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	<title>№4 2022 &#8211; ВОПРОСЫ ЛЕСНОЙ НАУКИ/FOREST SCIENCE ISSUES</title>
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		<title>PROFESSOR OLGA V. SMIRNOVA’S SYSTEM OF VIEWS  IN FOREST ECOSYSTEM ECOLOGY</title>
		<link>https://jfsi.ru/en/professor-olga-v-smirnovas-system-of-views-in-forest-ecosystem-ecology/</link>
		
		<dc:creator><![CDATA[lena]]></dc:creator>
		<pubDate>Thu, 06 Jul 2023 07:29:30 +0000</pubDate>
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					<description><![CDATA[Original Russian Text © 2019 O. I. Evstigneev, V. N. Korotkov published in Forest Science Issues Vol. 2, No. 4, pp. 1–36. © 2022                     &#46;&#46;&#46;]]></description>
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<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000; font-size: 10pt;">Original Russian Text © <a style="color: #000000;" href="https://jfsi.ru/2-4-2019-evstigneev_korotkov/">2019 O. I. Evstigneev, V. N. Korotkov published in Forest Science Issues Vol. 2, No. 4, pp. 1–36.</a></span></p>
<p style="text-align: left;"><span style="font-family: 'times new roman', times, serif; color: #000000;">© 2022                                             <strong>O. I. Evstigneev <sup>1, 3 *</sup>, V. N. Korotkov<sup>2</sup></strong></span><span style="font-family: 'times new roman', times, serif; color: #000000;">                </span></p>
<p style="text-align: center;"><span style="font-family: 'times new roman', times, serif; color: #000000;"><sup>1</sup><em>State Nature Biosphere Reserve “Bryanskii Les”, </em></span><br />
<em><span style="font-family: 'times new roman', times, serif; color: #000000;">Nerussa Station, Bryansk Oblast 242180, Russia</span></em></p>
<p style="text-align: center;"><span style="font-family: 'times new roman', times, serif; color: #000000;"><sup>2</sup><em>Yu. A. Israel Institute of Global Climate and Ecology, 20B </em></span><br />
<em><span style="font-family: 'times new roman', times, serif; color: #000000;">Glebovskaya st., Moscow 107258, Russia</span></em></p>
<p style="text-align: center;"><span style="font-family: 'times new roman', times, serif; color: #000000;"><em><sup>3</sup></em><em>Center for Forest Ecology and Productivity of </em><em>the RAS,<br />
Profsoyuznaya st. 84/32 bldg. 14, Moscow</em><em>,</em><em> 117997, Russia </em></span></p>
<p style="text-align: center;"><span style="font-family: 'times new roman', times, serif; color: #000000;">*E-mail: <a style="color: #000000;" href="mailto:quercus_eo@mail.ru">quercus_eo@mail.ru</a></span></p>
<p style="text-align: center;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Received: 16.09.2019</span></p>
<p style="text-align: center;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Revised: 07.10.2019</span></p>
<p style="text-align: center;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Accepted: 07.10.2019</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;"><strong> </strong></span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Professor Olga V. Smirnova, Doctor of Biological Sciences, is a prominent scientist in the field of plant demography, population biology, and forest ecosystem ecology. Professor Olga V. Smirnova’s edifice is based on ideas about the leading role of plant and animal populations in the organization of the biogeocenotic cover. In this case, it is implied that a continuous generational turnover in edificator (keystone species) populations is necessary to maintain the species and structural diversity in communities and ensure their sustainability. This system of views was influenced by Professor Alexey A. Uranov. The development of these ideas was consistent and gradual. First, Professor Olga V. Smirnova studied the biology of different plant species life forms. Examining their individual development, with identification of ontogenetic stages, is necessary for demographic research. She then developed the theory of coenopopulations as supraorganismal systems, which can self-sustain under different conditions. Finally, she developed the doctrine of biogeocenosis as a system of interacting populations and created the concept of anthropogenic transformation of the forest cover in the Holocene. Her contributions helped researchers to understand the mechanisms of the formation of modern zonality that are due to human activity.</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;"><strong>Key words:</strong> <em>plant</em> <em>biological age, plant population strategy, coenopopulation, edificator, forest ecosystem ecology, modern zonality, historical ecology</em></span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">October 9, 2019 marks the anniversary of Professor Olga Vsevolodovna Smirnova, Doctor of Biological Sciences, a prominent scientist in the field of plant demography, population biology and forest ecosystem ecology (Fig. 1).</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Professor Olga V. Smirnova was born to the family of intellectual workers in 1939. Her mother, Nina Nikolaevna, was a French to Russian translator, and her father, Vsevolod Mikhailovich, was an engineer. Her maternal grandfather, Nikolai A. Zhukov, graduated from the Moscow Higher Vocational School of Commerce (now Financial Academy) and worked as an economist with the People’s Commissariat for Foreign Affairs. Her paternal grandfather, Mikhail I. Smirnov, graduated from the Moscow Archaeological Institute in Nizhny Novgorod. He was an outstanding professional who specialized in local history and founded the Pereslavl-Zalessky Historical, Architectural and Art Museum-Reserve in 1919. Olga V. Smirnova spent her childhood in Gagarinsky Lane in the very heart of Moscow (Zhukova, 2006).</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">She showed interest in biology in her high school years, attending a young naturalists hobby group at the All-Russian Society for the Protection of Nature (VOOP) headed by a renowned biologist Pyotr P. Smolin. In 1963, Olga V. Smirnova graduated from the Chair in Geobotany at M. V. Lomonosov Moscow State University. In 1968, she defended her Candidate of Sciences thesis under supervision of Professor Alexey A. Uranov that was devoted to the topic “Life cycles, number and age composition of populations of the main components of oak grass cover”. In 1983, she defended her Doctor of Sciences thesis devoted to the topic “Behavior of species and functional organization of grass cover of deciduous forests (a case study of plain broad-leaved forests in the European part of the USSR and linden forests of Siberia)”. From 1966 to 1992, Olga V. Smirnova had been employed with the Problem-Centered Biology Laboratory (PBL) at the V. I. Lenin Moscow State Pedagogical Institute (MGPI) (Fig. 2, 3). In 1987, she published the book <em>Grass Cover Structure of Broad-Leaved Forests</em> that resulted from her Candidate’s thesis and Doctor’s thesis. Since September 1, 1992, Professor Olga V. Smirnova has been employed as Principal Researcher at the Center of Forest Ecology and Productivity of the Russian Academy of Sciences (CEPF RAS). From 1993 to 2008, she taught at Pushchino State University (PuschGENI) at the Department of System Ecology, founded and headed by Professor Alexander S. Komarov (Fig. 4, 5). In 1994, a collective monograph <em>Eastern European Broadleaf Forests, </em>and in 2004, a two-volume book <em>Eastern European Forests: History in Holocene and Contemporaneity</em> were published under her editorship. In 2017, Springer published a revised version of this book, <em>European Russian Forests: Their Current State and Features of Their History</em> as requested by the <em>Plant and Vegetation</em> editorial board. The fundamentals of Professor Olga V. Smirnova’s research, starting with the young naturalists hobby group and to the present day, are her expeditionary studies she conducts every year (Fig. 6–8).</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">In 2015, Professor Olga V. Smirnova founded an international research journal, <strong><em>Russian Journal of Ecosystem Ecology</em>. The journal covers the functioning and dynamics of ecosystems, the organization of biogeocenotic cover, and other issues of ecology. </strong>Professor Olga V. Smirnova supervised 25 successfully defended Candidate’s theses (Sugorkina, 1989; Evstigneev, 1990; Argunova, 1993; Istomina, 1993; Korotkov, 1993; Nedoseko, 1993; Chumachenko, 1993; Kiseleva, 1994; Shanijazova, 1994; Barinova, 1997; Ripa, 1997; Samohina, 1997; Sarycheva, 2000; Bobrovskaja, 2001; Braslavskaja, 2001; Turubanova, 2002; Bobrovskij, 2004; Shestakova, 2005; Bogdanova, 2006; Romanovskij, 2006; Lugovaja, 2008; Popov, 2008; Aleinikov, 2010; Zaprudina, 2012; Kharitonenkov, 2012); five of her students were awarded the degree of Doctors of Sciences (Chumachenko, 2006; Argunova, 2010; Evstigneev, 2010; Bobrovskij, 2013; Nedoseko, 2018). On December 2, 1994, she was awarded the title of Full Professor in Botany. To date, Professor Olga V. Smirnova has published over 300 works. All her publications, including an extensive reference list, are available online at http://istina.msu.ru/profile/sov1933/.</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Professor Olga V. Smirnova’s views in forest biogeocenology / forest ecosystem ecology are based on ideas about interacting populations of living beings, which were shaped under the influence of her mentor, Professor Alexey A. Uranov (Shorina et al., 2014). Within the framework of said system of views, Professor Olga V. Smirnova made a significant contribution to enhancing the concepts of plant biological age and plant population strategy by developing the doctrine of coenopopopulations and biogeocenosis as a system of interacting populations, as well as to ideas about modern zonality as an anthropogenic phenomenon.</span></p>
<div id="attachment_5718" style="width: 1010px" class="wp-caption aligncenter"><img aria-describedby="caption-attachment-5718" loading="lazy" class="size-full wp-image-5718" src="https://jfsi.ru/wp-content/uploads/2023/07/Fig.-1.jpg" alt="Figure 1. Olga V. Smirnova. Top left: An expedition in Sabar, August 1979, the Middle Urals, Artinsky District, Sverdlovsk Oblast. Photo by O. G. Barinov. Top right: Before the trip to Sabar in 1991. Photo by M. A. Barinova. Bottom left: Defense of Natalia E. Bogdanova’s Candidate’s thesis at the Moscow State Pedagogical University, November 20, 2006. Bottom right: Defense of Ekaterina L. Zheleznaya’s Candidate’s thesis at Moscow State Pedagogical University, March 2, 2009. Photo by O. M. Zhelezny" width="1000" height="1380" srcset="https://jfsi.ru/wp-content/uploads/2023/07/Fig.-1.jpg 1000w, https://jfsi.ru/wp-content/uploads/2023/07/Fig.-1-217x300.jpg 217w, https://jfsi.ru/wp-content/uploads/2023/07/Fig.-1-742x1024.jpg 742w, https://jfsi.ru/wp-content/uploads/2023/07/Fig.-1-109x150.jpg 109w, https://jfsi.ru/wp-content/uploads/2023/07/Fig.-1-768x1060.jpg 768w" sizes="(max-width: 1000px) 100vw, 1000px" /><p id="caption-attachment-5718" class="wp-caption-text"><span style="font-family: 'times new roman', times, serif; color: #000000;"><strong>Figure 1</strong>. Olga V. Smirnova. <strong>Top left:</strong> An expedition in Sabar, August 1979, the Middle Urals, Artinsky District, Sverdlovsk Oblast. Photo by O. G. Barinov. <strong>Top right:</strong> Before the trip to Sabar in 1991. Photo by M. A. Barinova. <strong>Bottom left:</strong> Defense of Natalia E. Bogdanova’s Candidate’s thesis at the Moscow State Pedagogical University, November 20, 2006.<strong> Bottom right:</strong> Defense of Ekaterina L. Zheleznaya’s Candidate’s thesis at Moscow State Pedagogical University, March 2, 2009. Photo by O. M. Zhelezny</span></p></div>
<div id="attachment_5719" style="width: 1010px" class="wp-caption aligncenter"><img aria-describedby="caption-attachment-5719" loading="lazy" class="size-full wp-image-5719" src="https://jfsi.ru/wp-content/uploads/2023/07/Fig.-2.jpg" alt="Figure 2. Professor Olga V. Smirnova’s colleagues (start). Top: Olga V. Smirnova with Alexey A. Uranov’s students — Inna M. Ermakova (Researcher at the Problem-Centered Biology Laboratory, Moscow State Pedagogical Institute) and Nina M. Grigorieva (Professor of the Chair in Botany of the Moscow State Pedagogical Institute, right), 1974. Bottom left: Among the tall forest herbs with Tatiana I. Serebryakova (Head of Chair in Botany at the Moscow State Pedagogical Institute from 1974 to 1986) during a trip to Salair (Guryevsky District, Kemerovo Oblast), 1982. Photo by M. A. Barinova. Bottom right: Aleksandra A. Chistyakova (Candidate of Biological Sciences, Full Professor at the Chair in Botany, Physiology and Plant Biochemistry, Penza State University), a co-author of Olga V. Smirnova’s principal works devoted to the interacting populations in forest communities" width="1000" height="1333" srcset="https://jfsi.ru/wp-content/uploads/2023/07/Fig.-2.jpg 1000w, https://jfsi.ru/wp-content/uploads/2023/07/Fig.-2-225x300.jpg 225w, https://jfsi.ru/wp-content/uploads/2023/07/Fig.-2-768x1024.jpg 768w, https://jfsi.ru/wp-content/uploads/2023/07/Fig.-2-113x150.jpg 113w" sizes="(max-width: 1000px) 100vw, 1000px" /><p id="caption-attachment-5719" class="wp-caption-text"><span style="font-family: 'times new roman', times, serif; color: #000000;"><strong>Figure 2.</strong> Professor Olga V. Smirnova’s colleagues (start). <strong>Top:</strong> Olga V. Smirnova with Alexey A. Uranov’s students — Inna M. Ermakova (Researcher at the Problem-Centered Biology Laboratory, Moscow State Pedagogical Institute) and Nina M. Grigorieva (Professor of the Chair in Botany of the Moscow State Pedagogical Institute, right), 1974. <strong>Bottom left:</strong> Among the tall forest herbs with Tatiana I. Serebryakova (Head of Chair in Botany at the Moscow State Pedagogical Institute from 1974 to 1986) during a trip to Salair (Guryevsky District, Kemerovo Oblast), 1982. Photo by M. A. Barinova. <strong>Bottom right:</strong> Aleksandra A. Chistyakova (Candidate of Biological Sciences, Full Professor at the Chair in Botany, Physiology and Plant Biochemistry, Penza State University), a co-author of Olga V. Smirnova’s principal works devoted to the interacting populations in forest communities</span></p></div>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;"><strong> </strong></span></p>
<div id="attachment_5720" style="width: 1010px" class="wp-caption aligncenter"><img aria-describedby="caption-attachment-5720" loading="lazy" class="size-full wp-image-5720" src="https://jfsi.ru/wp-content/uploads/2023/07/Fig.-3.jpg" alt="Figure 3. Professor Olga V. Smirnova’s colleagues (cont’d). Top: With Roman V. Popadjuk (Researcher at the Problem-Centered Biology Laboratory, Moscow State Pedagogical Institute) during an expedition to Prioksko-Terrasny Nature Reserve in 1990. Photo by M. A. Barinova. Bottom left: Natalia A. Toropova (Candidate of Biological Sciences, Associate Professor at the Chair in Botany, Tambov State Pedagogical Institute) in the Kanevsky Nature Reserve (Cherkasy Oblast, Ukraine), 1983. Bottom right: Professor Olga V. Smirnova’s colleagues discussing research plans in the Laboratory of Ecosystem Modeling, Institute of Physicochemical and Biological Problems of Soil Science, RAS (Pushchino). Left: Lyudmila B. Zaugol’nova (Doctor of Biological Sciences, Principal Researcher at the Center of Forest Ecology and Productivity, RAS, Moscow), right: Larisa G. Khanina (Candidate of Biological Sciences, Associate Professor, Head of Laboratory of Computational Ecology, Institute of Mathematical Problems of Biology, RAS, Pushchino), 1999" width="1000" height="1052" srcset="https://jfsi.ru/wp-content/uploads/2023/07/Fig.-3.jpg 1000w, https://jfsi.ru/wp-content/uploads/2023/07/Fig.-3-285x300.jpg 285w, https://jfsi.ru/wp-content/uploads/2023/07/Fig.-3-973x1024.jpg 973w, https://jfsi.ru/wp-content/uploads/2023/07/Fig.-3-143x150.jpg 143w, https://jfsi.ru/wp-content/uploads/2023/07/Fig.-3-768x808.jpg 768w" sizes="(max-width: 1000px) 100vw, 1000px" /><p id="caption-attachment-5720" class="wp-caption-text"><span style="font-family: 'times new roman', times, serif; color: #000000;"><strong>Figure 3.</strong> Professor Olga V. Smirnova’s colleagues (cont’d). <strong>Top:</strong> With Roman V. Popadjuk (Researcher at the Problem-Centered Biology Laboratory, Moscow State Pedagogical Institute) during an expedition to Prioksko-Terrasny Nature Reserve in 1990. Photo by M. A. Barinova. <strong>Bottom left:</strong> Natalia A. Toropova (Candidate of Biological Sciences, Associate Professor at the Chair in Botany, Tambov State Pedagogical Institute) in the Kanevsky Nature Reserve (Cherkasy Oblast, Ukraine), 1983. <strong>Bottom right:</strong> Professor Olga V. Smirnova’s colleagues discussing research plans in the Laboratory of Ecosystem Modeling, Institute of Physicochemical and Biological Problems of Soil Science, RAS (Pushchino). Left: Lyudmila B. Zaugol’nova (Doctor of Biological Sciences, Principal Researcher at the Center of Forest Ecology and Productivity, RAS, Moscow), right: Larisa G. Khanina (Candidate of Biological Sciences, Associate Professor, Head of Laboratory of Computational Ecology, Institute of Mathematical Problems of Biology, RAS, Pushchino), 1999</span></p></div>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">The Concept of Plant Biological Age</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Classifying plant populations into ontogenetic (age) groups constitutes the basis of population demographics studies. The works of Tikhon A. Rabotnov (1950) and his followers, including Professor Olga V. Smirnova, substantiated and developed an approach to age differentiation in individual plants based on studying the ontogeny of living organisms from birth to death. The method provides for the allocation of stages in individual plant development, or ontogenetic states that reflect the biological age of an individual plant. Professor Olga V. Smirnova studied the ontogeny of over 30 plant species growing in Eastern European forests and linden trees of Western Siberia (Table 1). She presented early descriptions of the ontogeny in three collective monographs edited by Professor Alexey A. Uranov, <em>Ontogenesis and Age Composition of Flowering Plant Populations</em> (1967), <em>Morphogenesis of Flowering Plants and The Structure of Their Populations</em> (1968) and <em>Age Composition of Flowering Plant Populations Due to Their Ontogenesis </em>(1974).</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">These works show that defining the ontogenetic (age) state is incomparably more important for demographic research than the analysis of numerical age. This is due to two reasons: 1) different individual plants of the same species often reach the same ontogenetic state in different numerical terms; yet, since they are at the same development stage, they play the same part in the population and in the community; 2) the time individual plants of different species and life forms take to go through the same ontogenetic states may vary. All this means that it may be more logical to associate comparative assessment of significance of plants in coenosis with not numerical age but development stage, that is, the ontogenetic state.</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;"><strong>Table 1.</strong> Ontogeny of plants studied by Professor Olga V. Smirnova</span></p>
<div style="overflow-x: auto;">
<table style="border: 1px #f1f1f1 solid; background-color: #ffffff;">
<tbody>
<tr>
<td width="239"><span style="font-family: 'times new roman', times, serif; color: #000000;">Life forms</span></td>
<td width="403"><span style="font-family: 'times new roman', times, serif; color: #000000;">Plants</span></td>
</tr>
<tr>
<td width="239"><span style="font-family: 'times new roman', times, serif; color: #000000;">Long rhizome herbs</span></td>
<td width="403"><span style="font-family: 'times new roman', times, serif; color: #000000;"><em>Aegopodium podagraria</em> L., <em>Carex pilosa</em> Scop., <em>Mercurialis perennis</em> L.</span></td>
</tr>
<tr>
<td width="239"><span style="font-family: 'times new roman', times, serif; color: #000000;">Short rhizome herbs</span></td>
<td width="403"><span style="font-family: 'times new roman', times, serif; color: #000000;"><em>Anemone altaica</em> Fisch. Ex C. A. Mey., <em>A. coerulea</em> D. C., <em>A. nemorosa</em> L., <em>A. ranunculoides</em> L., <em>Asarum europaeum</em> L., <em>Carex sylvatica</em> Huds., <em>Dentaria bulbifera</em> L., <em>D. quinguefolia</em> Bleb., <em>Lamium maculatum</em> (L.) L., <em>Pulmonaria obscura</em> Dumort., <em>Lathyrus vernus</em> (L.) Bernh.,</span></p>
<p><span style="font-family: 'times new roman', times, serif; color: #000000;"><em>Viola mirabilis</em> L.</span></td>
</tr>
<tr>
<td width="239"><span style="font-family: 'times new roman', times, serif; color: #000000;">Bulb-rhizome herbs</span></td>
<td width="403"><span style="font-family: 'times new roman', times, serif; color: #000000;"><em>Allium victorialis</em> L., <em>Erythronium sibiricum</em></span></p>
<p><span style="font-family: 'times new roman', times, serif; color: #000000;">(Fisch et Mey) Kryl.</span></td>
</tr>
<tr>
<td width="239"><span style="font-family: 'times new roman', times, serif; color: #000000;">Bulbiferous herbs</span></td>
<td width="403"><span style="font-family: 'times new roman', times, serif; color: #000000;"><em>Allium ursinum</em> L., <em>Gagea erubescens</em> (Bess.) Schult. &#038; Schult. Fil., <em>G. granulosa </em>Turcz., <em>G. lutea</em> (L.) Ker-Gawl., <em>G. minima</em> (L.) Ker-Gawl., <em>Scilla bifolia</em> L., <em>S. sibirica</em> Haw, <em>Tulipa biebersteiniana</em> Schult. &#038; Schult. Fil.</span></td>
</tr>
<tr>
<td width="239"><span style="font-family: 'times new roman', times, serif; color: #000000;">Tuberous herbs</span></td>
<td width="403"><span style="font-family: 'times new roman', times, serif; color: #000000;"><em>Corydalis bracteata </em>(Steph.) Pers., <em>C. solida </em>(L.) Clairv., <em>C. cava </em>(L.)Schweigg. &#038; Koerte, <em>C. marschalliana </em>(Pall. Ex Willd.) Pers.</span></td>
</tr>
<tr>
<td width="239"><span style="font-family: 'times new roman', times, serif; color: #000000;">Litter-ground-creeping herbs</span></td>
<td width="403"><span style="font-family: 'times new roman', times, serif; color: #000000;"><em>Galeobdolon luteum</em> Huds., <em>Galium odoratum</em> (L.) Scop., <em>Stellaria holostea</em> L., <em>Viola odorata</em> L.</span></td>
</tr>
<tr>
<td width="239"><span style="font-family: 'times new roman', times, serif; color: #000000;">Herbs with racemose root system</span></td>
<td width="403"><span style="font-family: 'times new roman', times, serif; color: #000000;"><em>Ficaria verna</em> Huds.</span></td>
</tr>
<tr>
<td width="239"><span style="font-family: 'times new roman', times, serif; color: #000000;">Taproot herbs</span></td>
<td width="403"><span style="font-family: 'times new roman', times, serif; color: #000000;"><em>Alliaria petiolata </em>(Bieb.) Cavara &#038; Grande</span></td>
</tr>
<tr>
<td width="239"><span style="font-family: 'times new roman', times, serif; color: #000000;">Trees</span></td>
<td width="403"><span style="font-family: 'times new roman', times, serif; color: #000000;"><em>Fagus sylvatica </em>L.</span></td>
</tr>
<tr>
<td colspan="2" width="642"><span style="font-family: 'times new roman', times, serif; color: #000000;">Note. Some of the ontogenies were researched in co-authorship; see the webpage at http://istina.msu.ru/profile/sov1933/</span></p>
<p><span style="font-family: 'times new roman', times, serif; color: #000000;"><em> </em></span></td>
</tr>
</tbody>
</table>
</div>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;"><strong> </strong></span></p>
<div id="attachment_5721" style="width: 1010px" class="wp-caption aligncenter"><img aria-describedby="caption-attachment-5721" loading="lazy" class="size-full wp-image-5721" src="https://jfsi.ru/wp-content/uploads/2023/07/Fig.-4.jpg" alt="Figure 4. Field trips. Top left: Summer field trip with 2nd-year undergraduate students of the Moscow State Pedagogical Institute in 1977 with Olga V. Smirnova (Candidate of Sciences, left) and Marina P. Solovyova (Associate Professor, Candidate of Sciences, second right) in Tellermanovskoe Forestry (Voronezh Oblast). Top right: Winter field trip with Master’s students of the Pushchino State University in Central Forest Nature Reserve, 1994: Konstantin V. Belyakov (Master’s student, left), Olga V. Smirnova, Mikhail S. Romanov (Master’s student, right). Photo by M. A. Barinova. Bottom left: Fall field trip with 1st-year Master’s students of the Pushchino State University in Kaluzhskiye Zaseki Nature Reserve, 1996. Left to right: Vladimir N. Korotkov (Candidate of Sciences, Senior Researcher at the All-Russian Research Center for Forest Resources), Oksana Sinotova (Master’s student), Marina Mishchenko (Master’s student), Larisa Tarasova (Master’s student), Maxim V. Bobrovskij (Senior Lecturer). Sitting, left to right: Aleksandr Kuritsyn (Master’s student), Vladimir Timofeev (Master’s student), Aleksandra Agafonova (postgraduate student), Olga V. Smirnova, Alexey Egorov (Master’s student). Bottom right: Fall field trip with 1st-year Master’s students of the Pushchino State University in Russky Sever National Park, 2005. Left to right: Alexey Aleinikov, Maxim Kharitonenkov, Olga V. Smirnova, Ekaterina Kobozeva, Vladimir Shanin, Alexey Gornov. Photo by M. V. Bobrovskij" width="1000" height="857" srcset="https://jfsi.ru/wp-content/uploads/2023/07/Fig.-4.jpg 1000w, https://jfsi.ru/wp-content/uploads/2023/07/Fig.-4-300x257.jpg 300w, https://jfsi.ru/wp-content/uploads/2023/07/Fig.-4-150x129.jpg 150w, https://jfsi.ru/wp-content/uploads/2023/07/Fig.-4-768x658.jpg 768w" sizes="(max-width: 1000px) 100vw, 1000px" /><p id="caption-attachment-5721" class="wp-caption-text"><span style="font-family: 'times new roman', times, serif; color: #000000;"><strong>Figure 4.</strong> Field trips. <strong>Top left:</strong> Summer field trip with 2nd-year undergraduate students of the Moscow State Pedagogical Institute in 1977 with Olga V. Smirnova (Candidate of Sciences, left) and Marina P. Solovyova (Associate Professor, Candidate of Sciences, second right) in Tellermanovskoe Forestry (Voronezh Oblast). <strong>Top right:</strong> Winter field trip with Master’s students of the Pushchino State University in Central Forest Nature Reserve, 1994: Konstantin V. Belyakov (Master’s student, left), Olga V. Smirnova, Mikhail S. Romanov (Master’s student, right). Photo by M. A. Barinova. <strong>Bottom left:</strong> Fall field trip with 1st-year Master’s students of the Pushchino State University in Kaluzhskiye Zaseki Nature Reserve, 1996. Left to right: Vladimir N. Korotkov (Candidate of Sciences, Senior Researcher at the All-Russian Research Center for Forest Resources), Oksana Sinotova (Master’s student), Marina Mishchenko (Master’s student), Larisa Tarasova (Master’s student), Maxim V. Bobrovskij (Senior Lecturer). Sitting, left to right: Aleksandr Kuritsyn (Master’s student), Vladimir Timofeev (Master’s student), Aleksandra Agafonova (postgraduate student), Olga V. Smirnova, Alexey Egorov (Master’s student). <strong>Bottom right:</strong> Fall field trip with 1st-year Master’s students of the Pushchino State University in Russky Sever National Park, 2005. Left to right: Alexey Aleinikov, Maxim Kharitonenkov, Olga V. Smirnova, Ekaterina Kobozeva, Vladimir Shanin, Alexey Gornov. Photo by M. V. Bobrovskij</span></p></div>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">The Concept of Plant Population Strategy</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Based on the system of ideas about plant coenotypes proposed by Leonty G. Ramensky (1935) and the concept of plant strategies developed by J. Grime (1979), Professor Olga V. Smirnova substantiated a new approach to studying plant population strategies (population behavior) (Smirnova, 1980, 1987; Smirnova, Chistyakova, 1980). The essential provisions of this approach are as follows.</span></p>
<ol style="text-align: justify;">
<li><span style="font-family: 'times new roman', times, serif; color: #000000;">The following properties are considered as integral, phytocoenotically significant plant population strategies: competitive, phytocoenotically tolerant, and reactive. <em>Competitive strategy </em>(violent, competitive power) means the ability of species to create and control the environment in a community, as well as suppress other living organisms due to the great vitality and highly intensive environment use. <em>Phytocoenotically tolerant strategy</em> (patient, resistance, endurance in an extremely unfavorable phytocoenotic environment) means the ability of species to survive for a long time in the area occupied by other living organisms, due to the maximum lowered vitality. <em>Reactive strategy</em> (explerent, dynamism, pioneering, ruderality) means the tendency of a species to the fastest possible development of released resources in the community due to vigorous vegetative growth and significant reproductive effort.</span></li>
</ol>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">According to said definitions, a plant population strategy means the ability of species to dominate or occupy a subordinate position in a community, which resulted from a long evolution in preagricultural climax coenoses undisturbed by humans. The described population strategies reflect the phytocoenotic potencies of a species. The real-life ranking of a species in a particular coenosis makes up its phytocoenotic position. Phytocoenotic potencies and phytocoenotic positions may be expected to overlap completely in climax communities in the preagricultural age. Real-life position of a species in modern communities differ significantly from its role in climax coenoses, since the communities structure has been fundamentally transformed by humans.</span></p>
<ol style="text-align: justify;" start="2">
<li><span style="font-family: 'times new roman', times, serif; color: #000000;">Integral properties (competitive, phytocoenotically tolerant, reactive) are inherent in every species but expressed to various degrees. Species that are predominantly competitive are violent, species that are predominantly tolerant are patient, and species that are predominantly ruderal are explerent. Aside from groups of species characterized by these three strategy types (behavior), following J. Grime (1979), Professor Olga V. Smirnova identified the groups of species that occupy an intermediate position.</span></li>
<li><span style="font-family: 'times new roman', times, serif; color: #000000;">Investigation of a plant strategy is based on investigation of biological properties of a species. This assumes a differentiated approach to studying biological (behavior) and ecosystem properties of a species. Knowing the ecosystem properties, one could reveal the requirements of a species to environment resources, whereas studying biological properties could help to define the method and nature of how to use said resources. In other words, plant ecosystem properties determine the species composition in a community, whereas biological properties determine the predominant or subordinate role of the species in the community. This approach to identifying types of plant behavior differs significantly from the methods of studying the coenotypes proposed by Leonty G. Ramensky (1935) and plant strategies developed by J. Grime (1979). Thus, Ramensky’s patient plants (or Grime’s stress-tolerant plants) are allocated based on ecosystem properties of species, while violent (competitive) plants and explerent (reactive) plants are allocated based on biological properties.</span></li>
<li><span style="font-family: 'times new roman', times, serif; color: #000000;">The history of studying phytocoenotic potencies in plants shows that it is not possible to single out any standalone, independent feature that would determine the type of plant behavior in its entirety. At the same time, each type of plant behavior is characterized by a set of particular (differential) properties, which are specific manifestations of competitive, tolerant and reactive strategy.</span></li>
<li><span style="font-family: 'times new roman', times, serif; color: #000000;">It may be advisable to analyze the types of behavior in plants of relative life forms occupying the same space-time niche and belonging to the same trophic level, i. e. the same synusia (Smirnova, 1987). This is determined by the fact that the types of a single synusia are characterized by similar impact on the environment and play a similar role in the community. Moreover, the biological originality of a given species is most fully manifested if we investigate the entire historically formed set of species at the same time. In temperate forests, synusias of trees, shrubs, summer broadleaf herbs, and early spring ephemeroids are usually considered as such (Eastern European &#8230;, 1994).</span></li>
</ol>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Based on these provisions and a detailed study of the biological plant properties, Professor Olga V. Smirnova developed a classification of plant species by strategy (behavior) type in the synusias of spring ephemeroids and summer broadleaf herbs (Smirnova, 1987). This approach was successfully implemented when studying the types of strategy of trees and shrubs in Eastern European forests (Smirnova, Chistyakova, 1980; Evstigneev, 2004, 2010; Evstigneev, Didenko, 2004). Below is an example of a plant classification by type of behavior in the synusia of summer broadleaf herbs (Smirnova, 1987).</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;"><strong>Type I</strong>. Competitive species (violent).</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Group 1 — vegetatively mobile: <em>Aegopodium podagraria</em> L., <em>Convallaria majalis</em> L., <em>Carex pilosa</em> Scop., <em>Mercurialis perennis</em> L.</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;"><strong>Type II</strong>. Tolerant species (patient).</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Group 1 — vegetatively slightly mobile: <em>Asarum europaeum</em> L., <em>Carex digitata</em> L., <em>C.</em> <em>rhizina</em> Blytt ex Lindbl., <em>Paris quadrifolia</em> L.<em>, Polygonatum multiflorum</em> (L.) All., <em>Pulmonaria obscura</em> Dumort., <em>Viola mirabilis</em> L.</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Group 2 — vegetatively immobile: <em>Brachypodium sylvaticum</em> (Huds.) Beauv., <em>Bromopsis benekenii</em> (Lange) Holub, <em>Carex sylvatica</em> Huds., <em>Campanula latifolia</em> L., <em>C. rapunculoides</em> L., <em>C. trachelium</em> L., <em>Dactylis glomerata</em> L., <em>Festuca gigantea</em> (L.) Vill., <em>F. sylvatica</em> L., <em>Geum urbanum</em> L., <em>Melica nutans</em> L., <em>Lathyrus vernus</em> (L.) Bernh., <em>Poa nemoralis</em> L., <em>Ranunculus cassubicus</em> L., <em>Scrophularia nodosa</em> L., <em>Scutellaria altissima</em> L.</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;"><strong>Type III</strong>. Reactive species (explerent).</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Subtype 1: competitive reactive species. Group 1 — vegetatively mobile: <em>Ajuga genevensis</em> L., <em>A. reptans</em> L., <em>Galeobdolon luteum</em> Huds., <em>Milium effusum L.</em>, <em>Viola odorata</em> L. Group 2 — vegetatively immobile: <em>Lamium maculatum</em> (L.) L.</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Subtype 2: Actually reactive. Group 1. Vegetatively mobile: <em>Galium odoratum</em> (L.) Scop., <em>Glechoma hederacea</em> L., <em>Stachys sylvatica</em> L., <em>Stellaria holostea</em> L., <em>Urtica dioica</em> L. Group 2: vegetatively immobile: <em>Alliaria petiolata</em> (Bieb.) Cavara &#038; Grande, <em>Chaerophyllum temulum</em> L., <em>Geranium robertianum</em> L., <em>Torilis japonica</em> (Houtt.) DC.</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Professor Olga V. Smirnova showed that defining phytocoenotic potencies in plants makes it possible to understand some features in the organization of climax coenoses which differed in maximum species diversity (Smirnova, Chistyakova, 1980; Smirnova, 1983, 1987). Competitive plant species constituted a stable basis for every synusia, for they were predominant in number and biomass, involved the largest portion of matter and energy in the community, significantly changed the coenotic environment, and executed the function of edificators. Tolerant plant species, having an extremely low vitality level, used resources that could not be occupied by competitively powerful plants. Reactive plant species “roamed around” from one disturbance to another and “patched the holes” that occasionally occurred in the community in areas where individuals died in populations of edificators. Species with different strategy (behavior) types act as complementary formations, thanks to which the community resources are used most efficiently.</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">The Theory of Coenopopulations</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">The team at the Problem-Centered Biology Laboratory at the Moscow State Pedagogical Institute where Professor Olga V. Smirnova was employed at the time, published four outstanding books on plant demography, <em>Plant Coenopopulations </em>(<em>Basic Concepts and Structure</em>) (1976), <em>Plant Coenopopulations </em>(<em>Development and Relationships</em>) (1977), <em>Dynamics of Plant Coenopopulations</em> (1985), and <em>Plant Coenopopulations </em>(<em>Essays on Population Biology</em>) (1988). The books are based on ideas of plant biological age. These monographs present the concept apparatus and propose a system of methods in plant population biology. Having summarized her long-term studies at the Problem-Centered Biology Laboratory and Chair in Botany at the Moscow State Pedagogical Institute, Professor Olga V. Smirnova, in collaboration with Lyudmila B. Zaugol’nova, developed the ideas of characteristic ontogenetic spectrum (COS) and elementary demographic unit (EDU).</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">COS is a full-membered ontogenetic spectrum with a certain ratio of ontogenetic group number, which allows for a continuous generational turnover. This spectrum is due to the plant biological properties: 1) total duration of ontogeny and individual age states; 2) rate of development in individuals having various ontogenetic states; 3) methods of population self-sustainment; 4) intensity and frequency of inspermation and elimination; 5) ability to create a soil reserve of seeds or other vegetative rudiments; 6) area of resource consumption by individuals at different stages of ontogeny (Zaugol’nova, 1994; Zaugol’nova, Smirnova, 1978; Smirnova, 1987; Zaugol’nova et al., 1992; Eastern European …, 1994, 2004). At first, in the framework of studies conducted by said researchers, COS was considered synonymous with “basic ontogenetic spectrum”. However, the authors later limited the concept of the basic ontogenetic spectrum with the modal one, obtained by averaging data on several coenopopulations belonging to one community variant (Smirnova et al., 1993; Zaugol’nova, 1994).</span></p>
<div id="attachment_5722" style="width: 1010px" class="wp-caption aligncenter"><img aria-describedby="caption-attachment-5722" loading="lazy" class="size-full wp-image-5722" src="https://jfsi.ru/wp-content/uploads/2023/07/Fig.-5.jpg" alt="Figure 5. Chair in System Ecology at the Training Center for Mathematical Biology of the Pushchino State University. Top: After Master’s thesis defense, July 1998. Sitting, left to right: Vitaly E. Reif (Master), Elena P. Sarycheva (postgraduate student), Andrey M. Tsyplyanovsky (postgraduate student), Sergey S. Bykhovets (Senior Lecturer). Standing (first row, left to right): Oksana A. Sinotova (Master), Galina E. Rubashko (Master), Elena S. Esipova (Master), Elena G. Didenko (Master), Irina F. Medvedeva (Head of Education Department), Valentina S. (Laboratory Assistant), Svetlana A. Turubanova (Master), Larisa G. Khanina (Candidate of Sciences, Associate Professor). Standing (second row, left to right): Vadim N. Pavlov (Doctor of Biology, Professor, Chairman of the State Examination Board), Maria M. Palenova (Candidate of Biological Sciences, Associate Professor), Alexander S. Komarov (Candidate of Biological Sciences, Associate Professor, Head of Chair), Olga V. Smirnova (Doctor of Biology, Full Professor), Anna V. Manukyants (Master), Vladimir V. Timofeev (Master), Maxim V. Bobrovskij (Senior Lecturer). Bottom left: Professor Olga V. Smirnova’s speech at the defense of Master’s theses on June 18, 2007. Bottom right: Olga V. Smirnova and Natalia A. Leonova (Candidate of Biological Sciences, Associate Professor at the Chair in Botany, Physiology and Plant Biochemistry of the Penza State University) after a research seminar on October 11, 1996 at the Chair in System Ecology" width="1000" height="1090" srcset="https://jfsi.ru/wp-content/uploads/2023/07/Fig.-5.jpg 1000w, https://jfsi.ru/wp-content/uploads/2023/07/Fig.-5-275x300.jpg 275w, https://jfsi.ru/wp-content/uploads/2023/07/Fig.-5-939x1024.jpg 939w, https://jfsi.ru/wp-content/uploads/2023/07/Fig.-5-138x150.jpg 138w, https://jfsi.ru/wp-content/uploads/2023/07/Fig.-5-768x837.jpg 768w" sizes="(max-width: 1000px) 100vw, 1000px" /><p id="caption-attachment-5722" class="wp-caption-text"><span style="font-family: 'times new roman', times, serif; color: #000000;"><strong>Figure 5.</strong> Chair in System Ecology at the Training Center for Mathematical Biology of the Pushchino State University. <strong>Top:</strong> After Master’s thesis defense, July 1998. Sitting, left to right: Vitaly E. Reif (Master), Elena P. Sarycheva (postgraduate student), Andrey M. Tsyplyanovsky (postgraduate student), Sergey S. Bykhovets (Senior Lecturer). Standing (first row, left to right): Oksana A. Sinotova (Master), Galina E. Rubashko (Master), Elena S. Esipova (Master), Elena G. Didenko (Master), Irina F. Medvedeva (Head of Education Department), Valentina S. (Laboratory Assistant), Svetlana A. Turubanova (Master), Larisa G. Khanina (Candidate of Sciences, Associate Professor). Standing (second row, left to right): Vadim N. Pavlov (Doctor of Biology, Professor, Chairman of the State Examination Board), Maria M. Palenova (Candidate of Biological Sciences, Associate Professor), Alexander S. Komarov (Candidate of Biological Sciences, Associate Professor, Head of Chair), Olga V. Smirnova (Doctor of Biology, Full Professor), Anna V. Manukyants (Master), Vladimir V. Timofeev (Master), Maxim V. Bobrovskij (Senior Lecturer). <strong>Bottom left:</strong> Professor Olga V. Smirnova’s speech at the defense of Master’s theses on June 18, 2007. <strong>Bottom right:</strong> Olga V. Smirnova and Natalia A. Leonova (Candidate of Biological Sciences, Associate Professor at the Chair in Botany, Physiology and Plant Biochemistry of the Penza State University) after a research seminar on October 11, 1996 at the Chair in System Ecology</span></p></div>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;"><strong> </strong></span></p>
<div id="attachment_5723" style="width: 1010px" class="wp-caption aligncenter"><img aria-describedby="caption-attachment-5723" loading="lazy" class="size-full wp-image-5723" src="https://jfsi.ru/wp-content/uploads/2023/07/Fig.-6.jpg" alt="Figure 6. Expeditions (start). Left: Olga V. Smirnova in the test area next to a wych elm, 1979. Sabar, Middle Urals, Artinsky District, Sverdlovsk Oblast. Photo by O. G. Barinov. Top: Before the trip to Sabar in 1991. Left to right: Svetlana I. Ripa (postgraduate student, Chair in Botany of the Moscow State Pedagogical Institute), Tatyana O. Yanitskaya (employee at the Chair in Higher Plants of the Moscow State University), Oleg G. Barinov (postgraduate student in Chemistry of the Moscow State Pedagogical Institute), Vladimir N. Korotkov (Researcher at the Laboratory of Nature Conservation Research Institute), Olga V. Smirnova (Doctor of Biological Sciences, Senior Researcher at the Moscow State Pedagogical Institute). Photo by M. A. Barinova. Bottom: Olga V. Smirnova on an all-terrain vehicle in Gorno-Khadytinsky Nature Reserve (Yamalo-Nenets Autonomous Okrug), 1999. Photo by M. V. Bobrovskij" width="1000" height="1100" srcset="https://jfsi.ru/wp-content/uploads/2023/07/Fig.-6.jpg 1000w, https://jfsi.ru/wp-content/uploads/2023/07/Fig.-6-273x300.jpg 273w, https://jfsi.ru/wp-content/uploads/2023/07/Fig.-6-931x1024.jpg 931w, https://jfsi.ru/wp-content/uploads/2023/07/Fig.-6-136x150.jpg 136w, https://jfsi.ru/wp-content/uploads/2023/07/Fig.-6-768x845.jpg 768w" sizes="(max-width: 1000px) 100vw, 1000px" /><p id="caption-attachment-5723" class="wp-caption-text"><span style="font-family: 'times new roman', times, serif; color: #000000;"><strong>Figure 6.</strong> Expeditions (start). <strong>Left:</strong> Olga V. Smirnova in the test area next to a wych elm, 1979. Sabar, Middle Urals, Artinsky District, Sverdlovsk Oblast. Photo by O. G. Barinov. <strong>Top:</strong> Before the trip to Sabar in 1991. Left to right: Svetlana I. Ripa (postgraduate student, Chair in Botany of the Moscow State Pedagogical Institute), Tatyana O. Yanitskaya (employee at the Chair in Higher Plants of the Moscow State University), Oleg G. Barinov (postgraduate student in Chemistry of the Moscow State Pedagogical Institute), Vladimir N. Korotkov (Researcher at the Laboratory of Nature Conservation Research Institute), Olga V. Smirnova (Doctor of Biological Sciences, Senior Researcher at the Moscow State Pedagogical Institute). Photo by M. A. Barinova. <strong>Bottom:</strong> Olga V. Smirnova on an all-terrain vehicle in Gorno-Khadytinsky Nature Reserve (Yamalo-Nenets Autonomous Okrug), 1999. Photo by M. V. Bobrovskij</span></p></div>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;"><strong> </strong></span></p>
<div id="attachment_5724" style="width: 1010px" class="wp-caption aligncenter"><img aria-describedby="caption-attachment-5724" loading="lazy" class="size-full wp-image-5724" src="https://jfsi.ru/wp-content/uploads/2023/07/Fig.-7.jpg" alt="Figure 7. Expeditions (cont’d 1). Top left: Olga V. Smirnova in Voronezh Nature Reserve, 1974, studying the structure of the grass cover in broad-leaved forests. Top right: Olga V. Smirnova next to a Korean pine in Ussurisky Nature Reserve (Far East), 2008. Photo by V. N. Korotkov. Bottom: Exploring the river bottom of the Podkamennaya Tunguska, July 2006. Evenkiysky District, Krasnoyarsk Krai, central area of Central Siberian Plateau. Olga V. Smirnova and Maxim V. Bobrovskij (Candidate of Biological Sciences, Associate Professor at the Chair in System Ecology, Pushchino State University)" width="1000" height="1228" srcset="https://jfsi.ru/wp-content/uploads/2023/07/Fig.-7.jpg 1000w, https://jfsi.ru/wp-content/uploads/2023/07/Fig.-7-244x300.jpg 244w, https://jfsi.ru/wp-content/uploads/2023/07/Fig.-7-834x1024.jpg 834w, https://jfsi.ru/wp-content/uploads/2023/07/Fig.-7-122x150.jpg 122w, https://jfsi.ru/wp-content/uploads/2023/07/Fig.-7-768x943.jpg 768w" sizes="(max-width: 1000px) 100vw, 1000px" /><p id="caption-attachment-5724" class="wp-caption-text"><span style="font-family: 'times new roman', times, serif; color: #000000;"><strong>Figure 7.</strong> Expeditions (cont’d 1). <strong>Top left:</strong> Olga V. Smirnova in Voronezh Nature Reserve, 1974, studying the structure of the grass cover in broad-leaved forests. <strong>Top right:</strong> Olga V. Smirnova next to a Korean pine in Ussurisky Nature Reserve (Far East), 2008. Photo by V. N. Korotkov. <strong>Bottom:</strong> Exploring the river bottom of the Podkamennaya Tunguska, July 2006. Evenkiysky District, Krasnoyarsk Krai, central area of Central Siberian Plateau. Olga V. Smirnova and Maxim V. Bobrovskij (Candidate of Biological Sciences, Associate Professor at the Chair in System Ecology, Pushchino State University)</span></p></div>
<div id="attachment_5725" style="width: 1010px" class="wp-caption aligncenter"><img aria-describedby="caption-attachment-5725" loading="lazy" class="size-full wp-image-5725" src="https://jfsi.ru/wp-content/uploads/2023/07/Fig.-8.jpg" alt="Figure 8. Expeditions (cont’d 2). Left: Olga V. Smirnova next to a rowan tree in Visimsky State Nature Biosphere Reserve, May 2019. Photo by A. P. Geraskina. Top: In the Pechora-Ilych Nature Reserve, August 2003. Left to right: Olga V. Smirnova, Elena Chernenkova, Sergey Pautov (Omsk State Technical University employee), Maxim Bobrovskij (Senior Lecturer at the Pushchino State University). Photo by V. N. Korotkov. Bottom: In the protected area of the Visimsky Nature Reserve during the study of a unique coniferous/broad-leaved forest populated with small-leaved linden and wych elm, May 2019. Left to right: Anna P. Geraskina (Candidate of Biological Sciences, Zoologist at the Center of Forest Ecology and Productivity, RAS), Rustam Z. Sibgatullin (Geobotanist at the nature reserve), Natalia V. Belyaeva (Phenologist at the nature reserve), Denis S. Shilov (Florist at the nature reserve), Olga V. Smirnova. Photo by V. N. Korotkov" width="1000" height="943" srcset="https://jfsi.ru/wp-content/uploads/2023/07/Fig.-8.jpg 1000w, https://jfsi.ru/wp-content/uploads/2023/07/Fig.-8-300x283.jpg 300w, https://jfsi.ru/wp-content/uploads/2023/07/Fig.-8-150x141.jpg 150w, https://jfsi.ru/wp-content/uploads/2023/07/Fig.-8-768x724.jpg 768w" sizes="(max-width: 1000px) 100vw, 1000px" /><p id="caption-attachment-5725" class="wp-caption-text"><span style="font-family: 'times new roman', times, serif; color: #000000;"><strong>Figure 8.</strong> Expeditions (cont’d 2). <strong>Left:</strong> Olga V. Smirnova next to a rowan tree in Visimsky State Nature Biosphere Reserve, May 2019. Photo by A. P. Geraskina. <strong>Top:</strong> In the Pechora-Ilych Nature Reserve, August 2003. Left to right: Olga V. Smirnova, Elena Chernenkova, Sergey Pautov (Omsk State Technical University employee), Maxim Bobrovskij (Senior Lecturer at the Pushchino State University). Photo by V. N. Korotkov. <strong>Bottom:</strong> In the protected area of the Visimsky Nature Reserve during the study of a unique coniferous/broad-leaved forest populated with small-leaved linden and wych elm, May 2019. Left to right: Anna P. Geraskina (Candidate of Biological Sciences, Zoologist at the Center of Forest Ecology and Productivity, RAS), Rustam Z. Sibgatullin (Geobotanist at the nature reserve), Natalia V. Belyaeva (Phenologist at the nature reserve), Denis S. Shilov (Florist at the nature reserve), Olga V. Smirnova. Photo by V. N. Korotkov</span></p></div>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">COS reflects the dynamically stable (definitive) coenopopulation state to which it returns from deviations caused by external influences. The real ontogenetic spectrum is most consistent with the COS in undisturbed (climax) communities. In human-transformed coenoses, the ontogenetic spectrum of a population generally deviates from COS to varying degrees (Coenopopopulations…, 1976; Smirnova et al., 1987, 1989, 1990, 1991, 1992; Eastern European …, 1994).</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Professor Olga V. Smirnova showed that plants have three types of characteristic ontogenetic spectra (Smirnova, 1987; Eastern European &#8230;, 1994). <em>The first type is left-sided</em> <em>spectrum</em>, with the maximum falling on pregenerative individuals. It is found in trees, monocarpic and oligocarpic tap-root herbs, bulbous, tuber-bulbous, and tuberous geophytes. These plants actively propagate by seed and/or deep rejuvenated vegetative rudiments. <em>The second type is a centered spectrum</em>: the largest number of individuals are located on middle-aged generative plants. It is characteristic of tap-rooted, long- and short-rhizomed herbs, sod grasses, and semi-shrubs. They have a weakly expressed aging period, propagate by seed or have a mixed propagation type, their vegetative reproduction is not accompanied by deep rejuvenation. <em>The third type is a bimodal spectrum </em>with two maxima: one in young individuals, and the other in mature or old generative individuals. This type is described in dense and loose sod grasses, tap-rooted and short-rhizomed herbs, in semi-shrubs. These plants have a significant life expectancy with a well-defined period of aging, their active propagation by seed is combined with vegetative reproduction with no deep rejuvenation.</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">EDU is a population unit, which is a set of individuals of different ages of the same species, necessary and sufficient to ensure sustainable generational turnover in the minimum allowable area. Important EDU characteristics include: 1) minimum number of individuals which allows for a continuous generational turnover; 2) minimum space necessary for a steady flow of generations; 3) lifetime of one generation (Smirnova et al., 1989; Zaugol’nova et al., 1993). EDU of different types are arranged in continuous series by values of each of the listed features (Table 2).</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;"><strong>Table 2.</strong> Some parameters of elementary demographic units (EDU) in plants growing in broad-leaved forests (Smirnova et al., 1992)</span></p>
<div style="overflow-x: auto;">
<table style="border: 1px #f1f1f1 solid; background-color: #ffffff;">
<tbody>
<tr>
<td width="208"><span style="font-family: 'times new roman', times, serif; color: #000000;">Type</span></td>
<td width="208"><span style="font-family: 'times new roman', times, serif; color: #000000;">Lifetime of a single generation, years</span></td>
<td width="208"><span style="font-family: 'times new roman', times, serif; color: #000000;">Minimum space, sq. m</span></td>
</tr>
<tr>
<td width="208"><span style="font-family: 'times new roman', times, serif; color: #000000;"><em>Quercus robur</em> L.</span></td>
<td width="208"><span style="font-family: 'times new roman', times, serif; color: #000000;">350</span></td>
<td width="208"><span style="font-family: 'times new roman', times, serif; color: #000000;">4.20 × 10<sup>5</sup></span></td>
</tr>
<tr>
<td width="208"><span style="font-family: 'times new roman', times, serif; color: #000000;"><em>Fraxinus excelsior</em> L.</span></td>
<td width="208"><span style="font-family: 'times new roman', times, serif; color: #000000;">250</span></td>
<td width="208"><span style="font-family: 'times new roman', times, serif; color: #000000;">1.30 × 10<sup>5</sup></span></td>
</tr>
<tr>
<td width="208"><span style="font-family: 'times new roman', times, serif; color: #000000;"><em>Tilia cordata</em> Mill.</span></td>
<td width="208"><span style="font-family: 'times new roman', times, serif; color: #000000;">180</span></td>
<td width="208"><span style="font-family: 'times new roman', times, serif; color: #000000;">2.70 × 10<sup>4</sup></span></td>
</tr>
<tr>
<td width="208"><span style="font-family: 'times new roman', times, serif; color: #000000;"><em>Acer platanoides</em> L.</span></td>
<td width="208"><span style="font-family: 'times new roman', times, serif; color: #000000;">180</span></td>
<td width="208"><span style="font-family: 'times new roman', times, serif; color: #000000;">1.80 × 10<sup>4</sup></span></td>
</tr>
<tr>
<td width="208"><span style="font-family: 'times new roman', times, serif; color: #000000;"><em>Carpinus betulus</em> L.</span></td>
<td width="208"><span style="font-family: 'times new roman', times, serif; color: #000000;">120</span></td>
<td width="208"><span style="font-family: 'times new roman', times, serif; color: #000000;">1.20 × 10<sup>4</sup></span></td>
</tr>
<tr>
<td width="208"><span style="font-family: 'times new roman', times, serif; color: #000000;"><em>Corylus avellana</em> L.</span></td>
<td width="208"><span style="font-family: 'times new roman', times, serif; color: #000000;">80</span></td>
<td width="208"><span style="font-family: 'times new roman', times, serif; color: #000000;">2.50 × 10<sup>3</sup></span></td>
</tr>
<tr>
<td width="208"><span style="font-family: 'times new roman', times, serif; color: #000000;"><em>Lathyrus vernus</em> (L.) Bernh.</span></td>
<td width="208"><span style="font-family: 'times new roman', times, serif; color: #000000;">20</span></td>
<td width="208"><span style="font-family: 'times new roman', times, serif; color: #000000;">1.00 × 10<sup>0</sup></span></td>
</tr>
<tr>
<td width="208"><span style="font-family: 'times new roman', times, serif; color: #000000;"><em>C. solida </em>(L.) Clairv.</span></td>
<td width="208"><span style="font-family: 'times new roman', times, serif; color: #000000;">10</span></td>
<td width="208"><span style="font-family: 'times new roman', times, serif; color: #000000;">0.25 × 10<sup>0</sup></span></td>
</tr>
<tr>
<td width="208"><span style="font-family: 'times new roman', times, serif; color: #000000;"><em>Geranium robertianum</em> L.</span></td>
<td width="208"><span style="font-family: 'times new roman', times, serif; color: #000000;">1</span></td>
<td width="208"><span style="font-family: 'times new roman', times, serif; color: #000000;">1.00 × 10<sup>0</sup></span></td>
</tr>
</tbody>
</table>
</div>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">The idea of EDU allowed Professor Olga V. Smirnova to propose a deeper definition of an important concept in forest ecology, namely the edificator (Smirnova, 1998; Smirnova, Toropova, 2008). This category includes species with the largest EDU and population mosaics existing for a long time. They include the largest portion of matter and energy in the cycles of generational turnover. Edificators belong to powerful environment converters. Populations of edificators with spontaneous development may transform a habitat to the greatest extent: they can change the hydrology, temperature, and lighting regime of a community, create micro- and mesorelief, and transform the soil cover. The intrinsic heterogeneity of the edificator EDU habitat allows for the coexistence of ecologically and biologically diverse species with smaller EDUs, and also maintains a high biodiversity level. The concept of edificator is synonymous with those of keystone species and ecosystem engineer. In the forest zone, edificators include species of various trophic groups and systematic positions: for example, large trees, needle- and leaf-eating insects, and tree-destroying fungi; river beavers join them in floodplain communities.</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">The Concept of Biogeocenosis as a System of Interacting Populations</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Professor Olga V. Smirnova has been actively developing an idea of the structure and dynamics of undisturbed (climax) forest biogeocoenoses that existed in the preagricultural age with no human intervention (East European &#8230;, 1994, 2004; Smirnova et al., 1988, 1989, 1990; Smirnova, 1998, 2000; Smirnova, Toropova, 2008). This understanding is based on a population view of the community and biogeocenotic cover. According to the concept of biogeocenosis as a system of interacting populations, the forest cover should be considered a hierarchy of population units in species of different trophic groups. The population life of edificators unites this multiscale mosaic into communities. Population mosaics of keystone species create an environment suitable for sustainable life of populations of many subordinate species and determine the maximum species diversity in communities.</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Phytogenic mosaicism in undisturbed forests results from the population life of edificator trees. In forests, the population life of trees creates a mosaic of lighting, water and soil regimes. This mosaic results from gaps in tree canopy that occur due to aging and death of one or several trees growing nearby. The death of a tree and associated soil perturbation determine the development of wind-soil complexes. At the same time, it builds a specific dumping microrelief, including hills, depressions, and coarse woody debris (Bobrovskij, 2004, 2013). Heterogeneous gap-like environment and wind-soil complexes, created as a result of generation flows in edificator tree populations, determines the presence of the maximum possible set of subordinate species of plants, animals, fungi, and representatives of other kingdoms in undisturbed forests. Having studied said mosaicism, Professor Olga V. Smirnova and her students created a new system of understanding forest ecology, the gap paradigm (Korotkov, 1991, 1993; Smirnova, 1998; Assessment &#8230;, 2000).</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Professor Olga V. Smirnova convincingly shows that mosaicism caused by vitality of animal phytophages is as characteristic a feature of forest landscapes as phytogenic one (Smirnova et al., 1993; Eastern European …, 1994, 2004). Zoogenic mosaicism in preagricultural forests resulted from population life of animal edificators. In undisturbed European forests, these animals included: 1) large herd ungulates (bison, auroch, tarpan, etc.); 2) leaf- and needle-eating insects; 3) beavers. Large herd ungulates that destroyed young trees, shrubs, and grasses, as well as compacted and cherished the soil, created zoogenic glades with meadow, forest margin, and meadow-steppe flora. By destroying leaves and needles, insects increase the illumination on the grass cover surface and the temperature of the air and soil, enrich the soil with nitrogen and other minerals, and also contribute to an increase in number of light-loving and nitrophilic types of herbs. Beavers, by building dams on streams and small rivers, create ponds and lowland swamps, increase species diversity and the number of related plant and animal species. By destroying trees and shrubs in the coastal strip, beavers form glades with light-loving flora and fauna.</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Professor Olga V. Smirnova shows that strong anthropogenic impact, destroying the population mosaic, breaks the cycles of generational turnover in keystone species. As a result, the development of communities becomes unidirectional, or succession, before the natural mosaic is restored. Understanding biogeocenosis as a system of interacting populations and a quantitative assessment of population parameters of principal coenosis builders make it possible to reconstruct the potential structure of biogeocenotic cover in an area, quantify the degree of disturbance in communities and their complexes, as well as to streamline existing succession systems.</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">The Concept of Anthropogenic Transformation of the Forest Cover in the Holocene</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Despite the large number of works devoted to anthropogenic transformation of the forest cover in the Holocene, the paradigm of climate migration still prevails in domestic science. Summarizing historical and paleontological data, Professor Olga V. Smirnova proposed a new, “anthropic” system of views that defines human impact as the essential factor in biogeocoenotic cover transformation in the Holocene (Smirnova, Bobrovskij, 2000; Smirnova et al., 2001a, 2001b, 2006, 2013; Turubanova, 2002; Smirnova, Turubanova, 2003; Haritonenkov, 2012; Smirnova, Toropova, 2016; Kalyakin et al., 2016; Smirnova, Toropova, 2016; Smirnova et al., 2018). This new paradigm can be described as follows.</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Written sources indicate that, over the recent 1–2 millennia, the diversity of life on Earth has been rapidly decreasing due to anthropogenic transformation. However, paleontological studies show that significant transformations on the Russian Plain and throughout Northern Eurasia date back much earlier. The first man-made environmental crisis in said area occurred 22–18 thousand years ago. It was caused by extermination of crucial edificators of late Pleistocene — that is, mammoths, woolly rhinoceros, giant deer, and other animals. They used to edify the composition and structure of plants and animals at that time. Herbs, primarily grasses, growing on meadow-steppe glades and forest margins were their primary source of nutrition. Meadow-steppe communities alternated with small clusters of trees. At the same time, palynology studies show that coniferous and broad-leaved tree species used to inhabit the entire Russian Plain in the Pleistocene. The soils of cryogenic savannah with a layer of permafrost underneath are chemically similar to modern chernozem soils. Their productivity throughout Northern Eurasia was so great that it allowed for sustainable existence of huge herds of giant phytophages and their retinue. Paleozoologists call this feature “the paradox of prehistoric pastures”. It was in cryogenic savannahs of the late Pleistocene (Upper or Final Paleolithic) that the sites of mammoth hunters with highly-developed farming and culture were found.</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Over the recent 10.000–7.000 years, there has been a general climate warming, which coincided with gradual destruction of keystone species of giant and large animals of the mammoth complex as a result of hunting. The degradation of the mammoth complex, which began in the late Pleistocene, led to woody plants strengthening their role. The pastures the mammoths and their companions used to graze were then inhabited by trees. The first trees appeared by volatile seeds and a rapid generational turnover: that were birch, willow, aspen, and pine trees. They were followed by dark coniferous (spruce, fir) and broad-leaved (oak, linden, maple, ash, beech, hornbeam, etc.) trees. The near extinction of the giants and largest phytophages in the mammoth complex, combined with warming, marked the beginning of development of a forest belt in the early Holocene at the site of former Pleistocene cryogenic savannahs.</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">At the beginning of the Middle Holocene (7.000–2.500 years ago), the forest belt was almost completely developed on the Russian plain with broad-leaved and dark coniferous trees being predominant species; it occupied the space from the northern to southern seas. Within the forest belt, due to transforming activity of bisons, aurochs, tarpans, the saiga and other animals, zoogenic glades with meadow and steppe plants occurred constantly. Beavers built settlements with wetlands along small watercourses. As a result, the biogeocenotic cover of the Middle Holocene was a set of forest-meadow-bog complexes, created and regulated by keystone species, that is, large herd ungulates, beavers, and trees.</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Since the mid-Middle Holocene occurred the production economy as the most powerful factor of biogeocenotic cover impact (agriculture, cattle breeding, smelting). The osteological material of this time includes a greatly reduced ratio of bones of wild ungulates (bison, auroch, tarpan, etc.) and increased ratio of livestock bones, whereas pollen of cultivated grasses appeared in the spore-pollen spectra. The production economy changed the biogeocenotic cover structure fundamentally. First of all, large herd ungulates and beavers disappeared not only due to hunting, but also due to the radical transformation of their habitats under the influence of slash-and-burn agriculture, logging and other harvesting trades. With the destruction of keystone animal species, the ratio of natural meadow-steppe ecosystems decreased, and that of forest ecosystems increased. As a result, the life of light-loving tree species (primarily oak and pine), as well as all light-loving plant species of other life forms, and many animal species that had previously inhabited zoogenic glades, became possible only in anthropogenic habitats. For example, pioneer tree species regenerated mainly on abandoned arable land.</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Relatively “independent” from humans remained the ecosystems of “shadow” coniferous/broad-leaved forests; their spontaneous development is possible even now under a natural reserve regime. However, only part of the region’s natural flora and fauna can sustainably exist in these communities.  Ecosystems representing the “fragments” of mid-Holocene forest-meadow-bog complexes have been preserved in the modern forest cover of the Russian Plain only as a small number of refugiums, untouched by strong anthropogenic transformation of recent centuries.</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">It is from the late mid-Holocene that it becomes fundamentally impossible to restore the potential (former) biogeocenotic cover in a spontaneous mode, since, on the one hand, the populations of keystone animal species (large herd ungulates and beavers) have greatly decreased in number, and, on the other hand, humans have become the most powerful environment transforming force. Human activity began to determine the existence of certain subordinate plant and animal species.</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">By the late mid-Holocene, forest burning for the slash-and-burn agriculture cycle pushed the southern border of the forest belt to the north. The spread of nomadic cattle breeding in the south of the Russian Plain resulted in the formation of steppe and semi-desert-steppe zones. These events were a major step towards modern zonality and probably had a significant impact on changes in the macroclimate of Eurasia in its entirety. They maybe were a reason for the growing climate instability in the second half of the Holocene.</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">From Iron Age to early Middle Ages (2.500–500 years ago), the northern borders of the ranges of broad-leaved tree species significantly retreated to the south, mainly due to slash-and-burn agriculture, which marked the beginning of the modern taiga — a forest strip where said tree species do not exist. At the same time, specific pyrogenic forests with predominance of <em>Pinus sylvestris</em> developed on the sandy soils of the forest belt. Slash-and-burn, and then cross-bed and arable agriculture, forest grazing, gathering litter and coarse woody debris as well as other kinds of forest use resulted in soil cover degradation in large areas. Forest burning on the northern border was the reason why the tundra zone developed from the forest tundra and northern taiga in the late Holocene.</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">In general, the production economy of the mid- and late Holocene divided the unified forest-meadow-bog complex into two groups: 1) ecosystems capable of supporting themselves with spontaneous development (“shadow” forests), which formed the forest belt itself; 2) ecosystems that require constant anthropogenic impact for life (floodplain and land meadows, meadow steppes, forests of pioneer tree species). At the same time, there was a final step in formation of anthropogenic zonality — under human impact, the unified forest belt on the Russian Plain divided into coniferous, coniferous/broad-leaved and broad-leaved forests.</span></p>
<p style="text-align: center;"><span style="font-family: 'times new roman', times, serif;"> <strong>CONCLUSION</strong></span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Professor Olga V. Smirnova’s edifice is based on ideas about the leading role of plant and animal populations in the organization of the biogeocenotic cover. In this case, it is implied that a continuous generational turnover in edificator (keystone species) populations is necessary to maintain the species and structural diversity in communities and ensure their sustainability. This system of views was influenced by Professor Alexey A. Uranov. The development of these ideas was consistent and gradual. First, Professor Olga V. Smirnova studied the biology of different plant species life forms. Examining their individual development, with identification of ontogenetic stages, is necessary for demographic research. She then developed the theory of coenopopulations as supraorganismal systems, which can self-sustain under different conditions. Finally, she developed the doctrine of biogeocenosis as a system of interacting populations and created the concept of anthropogenic transformation of the forest cover in the Holocene. Her contributions helped researchers to understand the mechanisms of the formation of modern zonality that are due to human activity.</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">We would like to congratulate Professor Olga V. Smirnova on her anniversary! We wish her a long life full of success in her new creative endeavors, vigor, energy, and good health! Her colleagues and students, as well as <em>Forest Science Issues</em> editorial board, join the congratulation.</span></p>
<p style="text-align: center;"><strong><span style="font-family: 'times new roman', times, serif; color: #000000;"> </span><span style="font-family: 'times new roman', times, serif; color: #000000;">ACKNOWLEDGMENTS</span></strong></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">The authors thank Oleg G. Barinov, Maria A. Barinova, Maxim V. Bobrovskij, Natalia N. Bogomolova, Alexey V. Gornov, Elena S. Esipova, Ekaterina L. Zheleznaya, Ekaterina A. Kobozeva, Svetlana I. Ripa, Mikhail S. Romanov, Andrey M. Romanovskij, Elena P. Sarycheva, Nikolay S. Smirnov and Larisa G. Khanina for their help in preparing this article.</span></p>
<p style="text-align: center;"><span style="font-family: 'times new roman', times, serif; color: #000000;"><strong>REFERENCES</strong></span></p>
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<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;"><strong>Reviewer:</strong> Candidate of Biological Sciences A. V. Gornov</span></p>
<p style="text-align: justify;">
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		<title>QUANTITATIVE ESTIMATES OF DIRECT PYROGENIC CARBON EMISSIONS IN FORESTS OF RUSSIA ACCORDING TO REMOTE MONITORING DATA 2021</title>
		<link>https://jfsi.ru/en/5-2-2022-ershov_sochilova/</link>
		
		<dc:creator><![CDATA[lena]]></dc:creator>
		<pubDate>Fri, 09 Jun 2023 16:31:59 +0000</pubDate>
				<category><![CDATA[№4 2022]]></category>
		<guid isPermaLink="false">https://jfsi.ru/?p=5696</guid>

					<description><![CDATA[ D.V. Ershov*, E. N. Sochilova   Center for Forest Ecology and Productivity of the Russian Academy of Sciences Profsoyuznaya st. 84/32 bldg. 14, Moscow, 117997, Russian Federation  *E-mail: dvershov67@gmail.com Received: 28.11.2022 Revised: 15.12.2022 Accepted:&#46;&#46;&#46;]]></description>
										<content:encoded><![CDATA[<p><span style="color: #000000;"><a style="color: #000000;" href="http://jfsi.ru/wp-content/uploads/2023/06/5-2-2022-Ershov_Sochilova.pdf"><img loading="lazy" class="size-full wp-image-1122 alignright" src="http://jfsi.ru/wp-content/uploads/2018/10/pdf.png" alt="" width="32" height="32" /></a></span></p>
<p style="text-align: center;"><span style="color: #000000;"><span style="font-family: 'times new roman', times, serif;"><strong> D.</strong></span><strong style="font-family: 'times new roman', times, serif;">V. Ershov</strong><sup style="font-family: 'times new roman', times, serif;">*</sup><strong style="font-family: 'times new roman', times, serif;">, E. N. Sochilova</strong></span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;"><strong> </strong></span></p>
<p style="text-align: center;"><span style="font-family: 'times new roman', times, serif; color: #000000;"><em>Center for Forest Ecology and Productivity of the Russian Academy of Sciences </em></span></p>
<p style="text-align: center;"><span style="font-family: 'times new roman', times, serif; color: #000000;"><em>Profsoyuznaya st. 84/32 bldg. 14, </em><em>Moscow, 117997</em><em>,</em><em> Russian Federation</em></span></p>
<p style="text-align: center;"><span style="font-family: 'times new roman', times, serif; color: #000000;"><em> </em></span><span style="font-family: 'times new roman', times, serif; color: #000000;"><sup>*</sup>E-mail: dvershov67@gmail.com</span></p>
<p style="text-align: center;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Received: 28.11.2022</span></p>
<p style="text-align: center;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Revised: 15.12.2022</span></p>
<p style="text-align: center;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Accepted: 18.12.2022</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">The paper presents statistic of the amount of direct Carbon emissions during wildfires of 2021 in the forested lands of Russia using long-term satellite data. In 2021, the area of ​​forest fire damages was 9.3 million hectares, and the amount of Carbon emissions was 66.4 MtC. These values are almost two points higher than the long-term average values. A comparison of similar indicators for twenty years allowed us to conclude that that year is anomalous with respect to the entire time series, similarly to the fire seasons of 2003 and 2012. The period or interval of recurrence of three anomalous fire seasons is nine years. We do not know the reason for the recurrence of anomalous fire seasons. At the same time, the forested areas damaged of the wildfires and the amount of direst Carbon and other greenhouse gases emissions in anomalous fire season years decreases from 127.2 MtC (3.7 p.) in 2003, 83.8 MtC (2.4 p.) in 2012 to 66.4 MtC (1.9 p.) in 2021.</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;"><strong><em>Keywords</em></strong><strong><em>:</em></strong> <em>Wild</em><em>fires</em><em>, </em><em>Pyrogenic Emissions</em><em>, Carbon, Remote </em><em>Sensing</em> <em>Monitoring, Forest Fire Fuels</em></span></p>
<p>&nbsp;</p>
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<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;"><strong> </strong></span></p>
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		<title>IMPACT OF SILVICULTURAL PRACTICES ON SOIL CARBON:  A REVIEW</title>
		<link>https://jfsi.ru/en/5-4-2022-tebenkova_et_al/</link>
		
		<dc:creator><![CDATA[lena]]></dc:creator>
		<pubDate>Fri, 02 Jun 2023 16:18:19 +0000</pubDate>
				<category><![CDATA[№4 2022]]></category>
		<guid isPermaLink="false">https://jfsi.ru/?p=5688</guid>

					<description><![CDATA[D.N. Tebenkova, D. V. Gichan, Yu. N. Gagarin   Center for Forest Ecology and Productivity of the Russian Academy of Sciences Profsoyuznaya st. 84/32 bldg. 14, Moscow, 117997, Russian Federation   E-mail: tebenkova.dn@gmail.com Received:&#46;&#46;&#46;]]></description>
										<content:encoded><![CDATA[<p><a style="color: #000000;" href="http://jfsi.ru/wp-content/uploads/2023/06/5-4-2022-Tebenkova_et_al.pdf"><img loading="lazy" class="size-full wp-image-1122 alignright" src="http://jfsi.ru/wp-content/uploads/2018/10/pdf.png" alt="" width="32" height="32" /></a></p>
<p style="text-align: center;"><span style="font-family: 'times new roman', times, serif; color: #000000;"><strong>D.N. Tebenkova, D. V. Gichan, Yu. N. Gagarin</strong></span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;"><strong> </strong></span></p>
<p style="text-align: center;"><span style="font-family: 'times new roman', times, serif; color: #000000;"><em>Center for Forest Ecology and Productivity of the Russian Academy of Sciences </em></span></p>
<p style="text-align: center;"><span style="font-family: 'times new roman', times, serif; color: #000000;"><em>Profsoyuznaya st. 84/32 bldg. 14, </em><em>Moscow</em><em>,</em><em> 117997</em><em>,</em><em> Russian Federation</em></span></p>
<p style="text-align: center;"><span style="font-family: 'times new roman', times, serif; color: #000000;"><em> </em></span></p>
<p style="text-align: center;"><span style="font-family: 'times new roman', times, serif; color: #000000;">E-mail: tebenkova.dn@gmail.com</span></p>
<p style="text-align: center;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Received: 20.11.2022</span></p>
<p style="text-align: center;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Revised: 18.12.2022</span></p>
<p style="text-align: center;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Accepted: 20.12.2022</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;"><em> </em></span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">The paper provides a review of Russian and foreign articles regarding studying the impact of silvicultural practices on the soil carbon pool to assess the effectiveness of forest carbon projects. Analyzing the works allowed us to conclude that silvicultural practices affect the content of soil carbon through a change in the rate of influx and decomposition of organic matter and, as a result, affect the redistribution of carbon in the soil profile. High-intensity felling, including clear felling, removal of logging residues, damage to the ground cover when planting forest crops, and the development of monocultures can negatively affect the soil carbon pool. On the contrary, selective and low-intensity thinning, leaving logging residues, and planting mixed forest stands, especially on abandoned agricultural lands, proved to be promising forest management practices that contribute to the accumulation and conservation of soil carbon.</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;"><strong><em> </em></strong></span><span style="font-family: 'times new roman', times, serif; color: #000000;"><strong><em>Keywords:</em></strong><em> carbon, soil, forest carbon projects, silvicultural practices</em></span></p>
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<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;"><em> </em></span></p>
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		<title>USE OF REMOTE SENSING DATA FROM SPACE FOR ROAD IMAGE RECOGNITION IN THE FORESTRY</title>
		<link>https://jfsi.ru/en/5-4-2022-podolskaia/</link>
		
		<dc:creator><![CDATA[lena]]></dc:creator>
		<pubDate>Wed, 19 Apr 2023 13:01:57 +0000</pubDate>
				<category><![CDATA[№4 2022]]></category>
		<guid isPermaLink="false">https://jfsi.ru/?p=5669</guid>

					<description><![CDATA[E. S. Podolskaia Center for Forest Ecology and Productivity of the Russian Academy of Sciences Profsoyuznaya st. 84/32 bldg. 14, Moscow, 117997, Russian Federation   E-mail: podols_kate@mail.ru Received: 08.10.2022 Revised: 19.12.2022 Accepted: 20.12.2022  &#46;&#46;&#46;]]></description>
										<content:encoded><![CDATA[<p><a style="color: #000000;" href="http://jfsi.ru/wp-content/uploads/2023/04/5-4-2022-Podolskaia.pdf"><img loading="lazy" class="size-full wp-image-1122 alignright" src="http://jfsi.ru/wp-content/uploads/2018/10/pdf.png" alt="" width="32" height="32" /></a></p>
<p style="text-align: center;"><span style="font-family: 'times new roman', times, serif; color: #000000;"><strong>E. S. Podolskaia </strong></span></p>
<p style="text-align: center;"><span style="font-family: 'times new roman', times, serif; color: #000000;"><em>Center for Forest Ecology and Productivity of the Russian Academy of Sciences </em></span></p>
<p style="text-align: center;"><span style="font-family: 'times new roman', times, serif; color: #000000;"><em>Profsoyuznaya st. 84/32 bldg. 14, </em><em>Moscow, 117997</em><em>,</em><em> Russian Federation</em></span></p>
<p style="text-align: center;"><span style="font-family: 'times new roman', times, serif; color: #000000;"><em> </em></span></p>
<p style="text-align: center;"><span style="font-family: 'times new roman', times, serif; color: #000000;">E-mail: podols_kate@mail.ru</span></p>
<p style="text-align: center;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Received: 08.10.2022</span></p>
<p style="text-align: center;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Revised: 19.12.2022</span></p>
<p style="text-align: center;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Accepted: 20.12.2022</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;"><em> </em></span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Paper presents an overview of history and current research state on the use of remote sensing data from space to recognize roads for the regional projects. We have characterized principles of road detection on the imagery. A group of direct deciphering signs used in combinations such as brightness and texture, geometry and brightness. Three research directions with examples identified: visual roads recognition, use of special software and libraries for developers, and use of neural networks. For the road network detection we have described methods and software, type and spatial resolution of imagery. Road image recognition based on the optical survey from the open and commercial sources, machine learning methods and neural networks. Actual tasks of road recognition are the following: evaluation of road surface condition, modeling of existing roads location, designing and building new roads, seasonality of roads use. A functionality summary of MapFlow plugin for road recognition in Open Source QGIS is given. Paper is a part of regional forestry transport modeling project to access the forest fires and forest resources by ground means.</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;"><strong><em>Key words:</em></strong><em> remote sensing data from space, road network, image recognition, forestry, neural networks, convolutional neural networks, Open Source QGIS, plugins, MapFlow</em></span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;"><em> </em></span></p>
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<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Satyanarayana V. L., Chandana Ch. G., Bindusha K., Padmanabhudu D., Shahanaaz bhanu G., Extraction of roads from satellite resolution images using Matlab, <em>International Journal of Engineering Applied Sciences and Technology, </em>2020, Vol. 4, No 12, pp. 708–714.</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Shoshina K. V., Sistema monitoringa i issledovanija lesnyh dorog (Forest road monitoring and research system),<em> Vestnik Severnogo (Arkticheskogo) Federal’nogo universiteta. Serija: Estestvennye nauki, </em>2013, No 4, pp. 50–54.</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Skripachev V. O., Gujda M. V., Gujda N. V., Zhukov A. O., Issledovanie svertochnyh nejronnyh setej dlja obnaruzhenija ob”ektov na ajerokosmicheskih snimkah (Research of convolutional neural networks to detect objects on the aerospace images), <em>International Journal of Open Information Technologies, </em>2022, Vol. 10, No 7, pp. 54–64.</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Tormozov V. S., Vasilenko K. A., Zolkin A. L., Nastrojka i obuchenie mnogoslojnogo perseptrona dlja zadachi vydelenija dorozhnogo pokrytija na kosmicheskih snimkah goroda (Setup and training of a multilayer perceptron for the task of highlighting the pavement on satellite images of the city),<em> Programmnye produkty i sistemy, </em>2020, Vol. 33, No 2, pp. 343–348, DOI: 10.15827/0236-235X.130.343-348.</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Turk Y., Boz F., Aydin A., Eker R., Evaluation of UAV usage possibility in determining the forest roads pavement degradation: preliminary results. 3rd International Engineering Research Symposium, INERS’19. Comparison of Autonomous and Manual UAV Flights in Determining Forest Road Surface Deformations, <em>European Journal of Forest Engineering,</em> 2022, Vol. 8 (2), pp. 77–84.</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Tusikova A. A., Vihtenko Je. M., O raspoznavanii avtomobil’nyh dorog na sputnikovyh snimkah s ispol’zovaniem svertochnyh setej MASK-RCNN (About the recognition of highways on satellite images using convolutional networks MASK-CNN),<em> V Mezhdunarodnaja konferencija </em>“<em>Informacionnye tehnologii i vysokoproizvoditel’nye vuchyslenija</em>” (<em>ITHPC-2019</em>)<em>, </em>Habarovsk, Rossija, 2019, pp. 308–314.</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Wei X., Fu X., Yun Y., Lv X., Multiscale and multitemporal road detection from high resolution SAR images based attention mechanism, <em>Remote Sensing,</em> 2021, Vol. 13, p. 3149. DOI: 10.3390/rs 13163149.</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Zegeye A., Road extraction from satellite imagery based on fully convolutional neural network, <em>IOSR Journal of Computer Engineering (IOSR-JCE),</em> 2020, Vol. 22, No 4, Ser. II, pp. 59–72, DOI: 10.9790/0661-2204035972.</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;">Zhurkin I. G., Badyshev T. T., Analiz izmenenij zheleznodorozhnoj seti po kosmicheskim snimkam (Analysis of changes in the railway network based on satellite images),<em> Izvestija vysshih uchebnyh zvedenij. Geodezija i ajerofotos</em>”<em>emka, </em>2014, Vol. 3, pp. 83–86.</span></p>
<p style="text-align: justify;"><span style="font-family: 'times new roman', times, serif; color: #000000;"><strong> </strong></span></p>
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		<title>Application of gis technologies to build spatial predictors for mapping forest ecosystem functions at the local level</title>
		<link>https://jfsi.ru/en/5-4-2022-savin_et_al/</link>
		
		<dc:creator><![CDATA[lena]]></dc:creator>
		<pubDate>Fri, 07 Apr 2023 07:13:33 +0000</pubDate>
				<category><![CDATA[№4 2022]]></category>
		<guid isPermaLink="false">https://jfsi.ru/?p=5652</guid>

					<description><![CDATA[Original Russian Text © 2022 M. S. Savin, A. S. Plotnikova, A. N. Narykova published in Forest Science Issues Vol. 5, No 2, Article 105. © 2022               &#46;&#46;&#46;]]></description>
										<content:encoded><![CDATA[<p><a style="color: #000000;" href="http://jfsi.ru/wp-content/uploads/2023/04/5-4-2022-Savin_et_al.pdf"><img loading="lazy" class="size-full wp-image-1122 alignright" src="http://jfsi.ru/wp-content/uploads/2018/10/pdf.png" alt="" width="32" height="32" /></a></p>
<p style="text-align: justify;"><span style="color: #000000; font-family: 'times new roman', times, serif;">Original Russian Text © 2022 M. S. Savin, A. S. Plotnikova, A. N. Narykova published in Forest Science Issues Vol. 5, No 2, Article 105.</span></p>
<p style="text-align: left;"><span style="color: #000000; font-family: 'times new roman', times, serif;"><strong>© 2022                                   M. S. Savin</strong><strong><sup>1</sup></strong><strong>, A. S. Plotnikova</strong><strong><sup>2</sup></strong><strong>, A. N. Narykova</strong><strong><sup>2</sup></strong></span></p>
<p style="text-align: center;"><span style="color: #000000; font-family: 'times new roman', times, serif;"><strong><em><sup> </sup></em></strong></span></p>
<p style="text-align: center;"><span style="color: #000000; font-family: 'times new roman', times, serif;"><em><sup>1 </sup></em><em>Faculty of Geography of Moscow State University </em></span></p>
<p style="text-align: center;"><span style="color: #000000; font-family: 'times new roman', times, serif;"><sup>2 </sup><em>Center for Forest Ecology and Productivity of the RAS</em></span></p>
<p style="text-align: center;"><span style="color: #000000; font-family: 'times new roman', times, serif;"><em>Profsoyuznaya st. 84/32 bldg. 14, Moscow, 117997, Russia</em></span></p>
<p style="text-align: center;"><span style="color: #000000; font-family: 'times new roman', times, serif;">E-mail: odm244@gmail.com</span></p>
<p style="text-align: center;"><span style="color: #000000; font-family: 'times new roman', times, serif;">Received: 18.04.2022</span></p>
<p style="text-align: center;"><span style="color: #000000; font-family: 'times new roman', times, serif;">Revised: 15.05.2022</span></p>
<p style="text-align: center;"><span style="color: #000000; font-family: 'times new roman', times, serif;">Accepted: 25.05.2022</span></p>
<p style="text-align: justify;"><span style="color: #000000; font-family: 'times new roman', times, serif;"><strong> </strong></span></p>
<p style="text-align: justify;"><span style="color: #000000; font-family: 'times new roman', times, serif;">The article presents the experience of using GIS technologies to prepare spatial predictors for their further use in modeling and mapping the dynamics of forest ecosystem functions. The study was conducted on the territory of the Dankovsky district forestry, which is located in the south of the Moscow region. GIS analysis of spatial data containing information about the relief and the hydrographic network of the study area was performed. As a result, morphometric values describing the surface runoff and altitude zonality of the study area have been created. The article describes GIS tools that can be used to create thematic geospatial products: slope exposure, steepness and curvature; direction, distance and length of the flow line, total flow; average altitude above sea level and distance to the river. In addition, the boundaries of river catchment basins have been identified by using GIS analysis, within which it is also planned to model climate-regulating forest functions associated with the carbon cycle.</span></p>
<p style="text-align: justify;"><span style="color: #000000; font-family: 'times new roman', times, serif;"><strong>Keywords</strong>:<em> GIS analysis, forests, climate-regulating functions and services, morphometric relief value, DEM, SRTM, OSM</em></span></p>
<p style="text-align: justify;"><span style="color: #000000; font-family: 'times new roman', times, serif;">Natural ecosystems are inextricably intertwined with ecosystem processes occurring therein, i. e. physical, chemical and biological forces or events linking organisms and their environment (Ecosystem processes, 2022). The totality of physical, biological, chemical and other processes that support the integrity and maintain the ecosystem is commonly referred to as ecosystem functions (Ansink et al., 2008). Ecosystem services are understood as the benefits that people obtain from ecosystems (Alсamo et al., 2005).</span></p>
<p style="text-align: justify;"><span style="color: #000000; font-family: 'times new roman', times, serif;">Four categories of ecosystem services are identified based on the types of benefits for humans in accordance with the Millennium Ecosystem Assessment (2005) classification: Provisioning, Regulating, Cultural and Supportive Services. Various mechanisms of ecosystem regulation of environmental indicators are considered as Regulating Services — in particular, climate regulation, hydrological regime regulation, erosion control, pollination and others. Mapping of climate-regulating services of forests is an important issue. It is associated with the functions of biomass production, carbon and nitrogen cycle regulation, formation of natural soil fertility, etc. (Lukina et al., 2020). This approach can be used as a tool for the topics of biodiversity and creating decision support systems.</span></p>
<p style="text-align: justify;"><span style="color: #000000; font-family: 'times new roman', times, serif;">To date, mapping of ecosystem functions and services at the local level has been most developed in Western Europe (Spain, Italy, Germany, Sweden, etc.) and the USA. The objective of many studies is the assessment and mapping of the ecosystem services, including climate regulation (Burkhard et al., 2009; Palomo et al., 2013; Felipe-Lucia et al., 2014; Istomina, Luzhkova, 2017). There are works on mapping carbon stocks in soils (Chan et al., 2006; Garcia-Pausas et al., 2007); soil stability (Nelson et al., 2009; Felipe-Lucia et al., 2014; Bruno et al., 2021); regulation of runoff (Burkhard et al., 2009; Nedkov et al., 2015) and the quality of water resources (Bruno et al., 2021).</span></p>
<p style="text-align: justify;"><span style="color: #000000; font-family: 'times new roman', times, serif;">According to current studies, mapping of ecosystem functions and services may include construction of regression models using machine learning methods. The purpose of this work is to create predictors by conducting GIS analysis of spatial data for their further use in modeling and mapping of forest ecosystem functions, including climate-regulating ones.</span></p>
<p style="text-align: center;"><span style="color: #000000; font-family: 'times new roman', times, serif;"><strong>OBJECTS AND MATERIALS OF THE STUDY</strong></span></p>
<p style="text-align: justify;"><span style="color: #000000; font-family: 'times new roman', times, serif;">The study investigates the territory of the Dankovsky district forestry, which is located in the south of the Moscow region on the border between the Moskvoretsko-Okskaya and Zaokskaya physiographic provinces (Atlas GUGK, 1976) (Fig. 1). The relief of the southern part of the Moscow region typically has wide, well-developed river valleys and a developed ravine network. There are also karst relief forms such as craters, caves, sinkholes in places close to the surface of carbonate rocks of the Carboniferous period (Vagner, Manucharjanc, 2003). Similar landforms could be found in Prioksko-Terrasny Biosphere Reserve, bordering the study area.</span></p>
<p style="text-align: justify;"><span style="color: #000000; font-family: 'times new roman', times, serif;">The Moscow region has a fairly dense river network with more than four hundred small and large rivers of the Caspian Sea basin. The Rechma, the Sushka and the Todenka are tributaries of the Oka river, which is one of the largest rivers of the Moscow region. It runs through the Dankovsky forest district, a research territory of interest (Fig. 1). In the soil cover of the forest zone of the Moscow region, sod-podzolic soils and podzols predominate, whereas in the floodplains of rivers, alluvial soils are common (Soil map of the Moscow region, 1985).</span></p>
<div id="attachment_5653" style="width: 1010px" class="wp-caption aligncenter"><img aria-describedby="caption-attachment-5653" loading="lazy" class="wp-image-5653 size-full" src="https://jfsi.ru/wp-content/uploads/2023/04/Pic_1_Савин.png" alt="Figure 1. Study area — Dankovsky district forestry of the Moscow region" width="1000" height="707" srcset="https://jfsi.ru/wp-content/uploads/2023/04/Pic_1_Савин.png 1000w, https://jfsi.ru/wp-content/uploads/2023/04/Pic_1_Савин-300x212.png 300w, https://jfsi.ru/wp-content/uploads/2023/04/Pic_1_Савин-150x106.png 150w, https://jfsi.ru/wp-content/uploads/2023/04/Pic_1_Савин-768x543.png 768w" sizes="(max-width: 1000px) 100vw, 1000px" /><p id="caption-attachment-5653" class="wp-caption-text"><span style="font-family: 'times new roman', times, serif; color: #000000;"><strong>Figure 1.</strong> Study area — Dankovsky district forestry of the Moscow region</span></p></div>
<p style="text-align: justify;"><span style="color: #000000; font-family: 'times new roman', times, serif;">The study included the analysis of spatial data containing information about the relief and the hydrographic network of the object of study by means of a geographic information system (GIS). Open data from the OpenStreetMap (OSM) mapping project were used for GIS analysis of the hydrographic network. OSM data are provided in common geoinformation formats, are divided by layers and have a clear structure of attribute information.</span></p>
<p style="text-align: justify;"><span style="color: #000000; font-family: 'times new roman', times, serif;">Currently, two types of digital elevation models (DEMs) are most common — raster models with a regular height network (GRID) and TIN models with an irregular triangulation network. Out of the many existing DEMs (GMTED2010, ASTER GDEM2, SPOT DEM, Next Map, NextMap World 30, TanDEM-X Global DEM, etc.), the Shuttle Radar Topography Mission (SRTM) raster model with a grid cell size of 30 × 30 m was selected for the study. The model was obtained by satellite radar imaging with SIR-C and X-SAR instruments and covers the territory of the Earth between 60°N and 54°S (USGS &#8230;, 2022). As was noted in the work of Ju. I. Karionov (2010), SRTM has a high degree of correspondence of the relief to topographic maps plotted to a scale of 1:100 000–1:50 000.</span></p>
<p style="text-align: justify;"><span style="color: #000000; font-family: 'times new roman', times, serif;"><strong> </strong></span></p>
<p style="text-align: center;"><span style="color: #000000; font-family: 'times new roman', times, serif;"><strong>GIS TOOLS FOR SPATIAL DATA ANALYSIS</strong></span></p>
<p style="text-align: justify;"><span style="color: #000000; font-family: 'times new roman', times, serif;">The impact of morphometric values representing surface runoff and altitude zonality should be assessed in models of climate-regulating functions of forests at the local level (Kuznetsova et al., 2020) (Fig. 2). Morphometric value (MV) refers to the numerical characters of the relief defined at each point of the map, such as slope height, steepness or exposure (Sharyj, 2006). This MV, along with the roughness (ruggedness) of the terrain, geometric shapes and thermal regimen of the slopes are one of the main aspects of the effect of relief on the functioning of the ecosystem.</span></p>
<div id="attachment_5654" style="width: 1010px" class="wp-caption aligncenter"><img aria-describedby="caption-attachment-5654" loading="lazy" class="wp-image-5654 size-full" src="https://jfsi.ru/wp-content/uploads/2023/04/Pic_2_Савин.png" alt="Figure 2. Schematic diagram of preparation of spatial predictors" width="1000" height="585" srcset="https://jfsi.ru/wp-content/uploads/2023/04/Pic_2_Савин.png 1000w, https://jfsi.ru/wp-content/uploads/2023/04/Pic_2_Савин-300x176.png 300w, https://jfsi.ru/wp-content/uploads/2023/04/Pic_2_Савин-150x88.png 150w, https://jfsi.ru/wp-content/uploads/2023/04/Pic_2_Савин-768x449.png 768w" sizes="(max-width: 1000px) 100vw, 1000px" /><p id="caption-attachment-5654" class="wp-caption-text"><span style="font-family: 'times new roman', times, serif; color: #000000;"><strong>Figure 2</strong>. Schematic diagram of preparation of spatial predictors</span></p></div>
<p style="text-align: justify;"><span style="color: #000000; font-family: 'times new roman', times, serif;">The research used ESRI (Environmental Systems Research Institute) software — the geographic information system of ArcGIS Desktop, supplemented with the Spatial Analyst module for spatial modeling and analysis. This module allows user to create, analyse and display raster data in the cartographic interface. Spatial Analyst can be used for raster data vectorization as well.</span></p>
<p style="text-align: justify;"><span style="color: #000000; font-family: 'times new roman', times, serif;"><strong>Identification of morphometric values describing surface runoff</strong></span></p>
<p style="text-align: justify;"><span style="color: #000000; font-family: 'times new roman', times, serif;">The ArcGIS Spatial Analyst module contains tools of the Hydrology toolset used to simulate the movement of water on the surface using a digital elevation model. Thematic tools of this group can be used independently or sequentially to build a network of streams or identify watersheds. The following tools were used: Flow Direction, Flow Distance and Flow Length for the runoff, Flow Accumulation for the total flow (Overview of the Hydrology toolset).</span></p>
<p style="text-align: justify;"><span style="color: #000000; font-family: 'times new roman', times, serif;">The<em> Flow Direction </em>tool creates a raster layer of flow direction from each pixel of the DEM to its steepest downslope neighbor. The methods of single and multiple flow directions were used. In the case of a single direction, the flow from the cell is running exclusively to one neighboring cell; in the case of multiple directions, the flow is distributed between different neighboring cells. The method of single flow direction D8 was used in the study, implying flow into only one of eight neighboring cells. A detailed description of the Flow Direction tool is given in the article by A. S. Plotnikova et al. (2017).</span></p>
<p style="text-align: justify;"><span style="color: #000000; font-family: 'times new roman', times, serif;">The<em> Flow Length </em>tool calculates the length of the flow inside the river basin. The input data is a raster layer of the flow direction. The tool makes it possible to choose the direction of measuring the length of the flow line: down or up the slope to the watershed line of the catchment basin area. The results can be applied in solving a wide range of ecological and hydrological problems, in particular, calculating the time of water passage to the outlet or for modeling surface runoff.</span></p>
<p style="text-align: justify;"><span style="color: #000000; font-family: 'times new roman', times, serif;">The<em> Flow Distance </em>tool calculates the minimum distance following the flow path to the cell into which they flow. The tool analyzes the raster layer of the flow direction D8. For each cell, one possible path downhill to the drain cell is identified, along which the flow distance is measured. In addition to the DEM and the flow direction, raster data of streams are required for the Flow Distance tool. The original vector data of OSM streams were translated into a raster representation using the <em>Polyline to Raster</em> tool<a style="color: #000000;" href="https://translated.turbopages.org/proxy_u/en-ru.ru.f035427c-6243a3b3-b7a9e2c8-74722d776562/https/gis.stackexchange.com/questions/140057/using-polyline-to-raster-tool-in-arcgis"> of the To Raster toolset of the Conversion Tools data conversion module</a>. The cells of the resulting raster layer are assigned to a particular spatial object as a result of applying the maximum or combined length method. The tool provides an option of interactive method selection.</span></p>
<p style="text-align: justify;"><span style="color: #000000; font-family: 'times new roman', times, serif;">The<em> Flow Accumulation </em>tool is used to create a raster layer of total flow to each pixel of the DEM. The input data is a raster layer of the flow direction. Pixels of the output raster layer with a high flow accumulation are areas of concentrated flow, where pixels with a flow accumulation of zero are sections of the watershed line (Jenson, Domingue, 1988). The tool requires the user to set the number of pixels involved in the flow analysis. Apart from that, based on the raster layer of the flow direction, the ArcGIS Spatial Analyst module allows to select the boundaries of river catchment basins (Fig. 3). The <em>Basin </em>or<em> Watershed </em>tools are used, which are described in detail in the work by A. S. Plotnikova and A. O. Kharitonova (2018).</span></p>
<p style="text-align: justify;"><span style="color: #000000; font-family: 'times new roman', times, serif;">The tools of the Surface toolset are used to determine the slope exposure, steepness and curvature. The<em> Aspect </em>tool creates raster surface of the exposure using the 3 × 3 cell “moving window” method. The result reflects the spatial orientation of the elementary slope of the DEM. Measurements are performed clockwise in degrees from 0 (north) to 360 (north again), making a full circle.</span></p>
<p style="text-align: justify;"><span style="color: #000000; font-family: 'times new roman', times, serif;">The<em> Slope </em>tool identifies the slope steepness, i. e. the degree of surface change in the horizontal and vertical directions. The tool finds the maximum height change per unit distance between the analyzed cell and eight surrounding neighbors. As a result, a raster layer of slope steepness is created in two different units of measurement — degrees or percentage points.</span></p>
<p style="text-align: justify;"><span style="color: #000000; font-family: 'times new roman', times, serif;">The<em> Curvature </em>tool creates a raster layer of the standard curvature of the slope, taking into account the profile and plan curvature. The profile curvature describes the angle of the maximum slope and is built parallel to the slope. Thus, the curvature of the profile characterizes the flow velocity on the surface. A negative value in the profile output indicates the surface as upwardly convex at the analyzed cell. It means that the flow slows down. A positive value indicates that the surface is upwardly concave, which means the acceleration of the flow. A positive value indicates the surface is upwardly concave — the flow accelerates. A value of 0 indicates the surface is flat and has a constant angle of slope. The plan curvature is perpendicular to the angle of maximum slope. The plan curvature characterizes the horizontal flow direction — convergence and divergence of the flow on the surface. In the planned output, a positive value indicates the surface is upwardly convex at that cell. A negative value indicates the surface is upwardly concave at that cell. A zero value also characterizes a surface with a constant angle of slope. Simultaneous consideration of both types of curvature, called standard curvature, allows us to better understand the patterns of redistribution of matter in liquid or solid form along the slope.</span></p>
<p style="text-align: justify;"><span style="color: #000000; font-family: 'times new roman', times, serif;"><strong>Identification of morphometric values describing altitude zonality</strong></span></p>
<p style="text-align: justify;"><span style="color: #000000; font-family: 'times new roman', times, serif;">The<em> Zonal Statistics as Table </em>tool of the Zonal toolset is used to find the value of the average altitude above sea level within the forest subcompartment that in the future will serve as a spatial unit for regression modeling of ecosystem functions of the object of study. The SRTM DEM and the vector layer of the boundaries of forest subcompartments are employed as an input dataset for the Zonal Statistics as a Table tool. As an output, we got a table of average heights within the subcompartment.</span></p>
<p style="text-align: justify;"><span style="color: #000000; font-family: 'times new roman', times, serif;">The final predictor created by GIS analysis of spatial data is the distance to the river, which was calculated in two stages. First, we found the centroid of the polygon of the forest subcompartment. This task was performed using the <em>Feature To Point </em>tool from the Features toolset of the ArcGIS Data Management Tools module. The tool translates input polygonal objects into output points — centroids of polygons. Then, the distance from the centroid of the subcompartment polygon to the object of the hydrological network was calculated using the <em>Near</em> tool of the Proximity toolset of the ArcGIS Analysis Tools data analysis module.</span></p>
<p style="text-align: center;"><span style="color: #000000; font-family: 'times new roman', times, serif;"><strong>RESULTS AND DISCUSSION</strong></span></p>
<p style="text-align: justify;"><span style="color: #000000; font-family: 'times new roman', times, serif;">The conducted research resulted in obtaining morphometric values describing surface runoff (direction, distance and length of the flow line, total flow; slope exposure, steepness and curvature) and altitude zonality (average altitude above sea level) of the Dankovsky district forestry. The obtained morphometric values can be considered as predictors for modeling climate-regulating functions, including those related to the carbon stocks and the formation of water runoff.</span></p>
<p style="text-align: justify;"><span style="color: #000000; font-family: 'times new roman', times, serif;">Figure 3 highlights the boundaries of the catchment basins of the rivers in the area of study. It is apparent that they correlate well with the results obtained in Kazan Federal University (Ermolaev et al., 2017). Kazan researchers propose to use the map of river basins of the European territory of Russia they had created for various geoecological assessments. There are quite a few examples of modern scientific research using the river basin as an object of environmental monitoring (Smolyaninov et al., 2007; Liseckij et al., 2014; Kharitonova et al., 2019).</span></p>
<div id="attachment_5655" style="width: 1010px" class="wp-caption aligncenter"><img aria-describedby="caption-attachment-5655" loading="lazy" class="wp-image-5655 size-full" src="https://jfsi.ru/wp-content/uploads/2023/04/Pic_3-_Савин.jpg" alt="Figure 3. Highlighted boundaries of river catchment basins" width="1000" height="707" srcset="https://jfsi.ru/wp-content/uploads/2023/04/Pic_3-_Савин.jpg 1000w, https://jfsi.ru/wp-content/uploads/2023/04/Pic_3-_Савин-300x212.jpg 300w, https://jfsi.ru/wp-content/uploads/2023/04/Pic_3-_Савин-150x106.jpg 150w, https://jfsi.ru/wp-content/uploads/2023/04/Pic_3-_Савин-768x543.jpg 768w" sizes="(max-width: 1000px) 100vw, 1000px" /><p id="caption-attachment-5655" class="wp-caption-text"><span style="font-family: 'times new roman', times, serif; color: #000000;"><strong>Figure 3.</strong> Highlighted boundaries of river catchment basins</span></p></div>
<p style="text-align: justify;"><span style="color: #000000; font-family: 'times new roman', times, serif;">The boundaries of the river basins of the European territory of Russia are identified on the basis of the GMTED2010 DEM with a resolution of 250 m. In addition to the boundaries, the map contains data on the nature, resource potential and ecological condition of the basin. Subject information like this will be useful in assessing the climate-regulating functions of forests related to the carbon cycle — for example, the dynamics of carbon stocks and the formation of the hydrological regime.</span></p>
<p style="text-align: justify;"><span style="color: #000000; font-family: 'times new roman', times, serif;">The above description of GIS tools used to analyze terrain and hydrographic network data for determining the direction, distance and length of the flow line, as well as exposure, steepness and curvature of the slope is of interest for various environmental studies within the framework of the basin concept of nature management.</span></p>
<p style="text-align: center;"><span style="color: #000000; font-family: 'times new roman', times, serif;"><strong>FINANCING</strong></span></p>
<p style="text-align: justify;"><span style="color: #000000; font-family: 'times new roman', times, serif;">The work was carried out as part of an additional agreement to the state task of the CEPF RAS (registration number 122110700044-2) in accordance with the Decree of the Government of the Russian Federation dated September 2, 2022 No 2515-р for the implementation of the most important innovative project of national importance aimed at creation of a unified national monitoring system for climatically active substances.</span></p>
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<p style="text-align: justify;"><span style="color: #000000; font-family: 'times new roman', times, serif;"><strong>Reviewer:</strong> Candidate of Technical Sciences V. S. Gruzinov</span></p>
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