Analysis of long-term population dynamics of small mammals in forest ecosystems of the Altai State Nature Reserve
Elena P. Chertkova, Researcher, Postgraduate Student
Altaiskiy State Nature Biosphere Reserve, Gorno-Altaisk, Russia; Center for Forest Ecology and Productivity of the Russian Academy of Sciences, Moscow, Russia, tchertckova.elena@yandex.ru, https://orcid.org/0000-0003-1009-367X
Abstract
The paper presents the analysis results of long-term population dynamics of small mammals based on the data obtained by scientists of the Altai Nature Reserve (Yu. F. Marin, V. A. Dolgovykh, E. S. Solomennikova, E. A. Gorbunova) from 1976 to 2015. According to the reports of the Chronicle of Nature, the species composition of small mammals is represented by two orders: rodents Rodentia — 13 species and insectivores Eulipotyphla — 11 species. For each species the author analyzed the abundance index, hit percentage, dominance index and synchronicity of population changes using Spearman’s rank correlation. The dominant species among mouse-like rodents is the northern red-backed vole Clethrionomys rutilus — 45%, the co-dominants are the gray-sided vole Cl. rufocanus — 16% and the common red-backed vole Cl. glareolus — 12.4%. Among insectivores, the common shrew Sorex araneus dominates — 60%, the co-dominants in different years are the equal-toothed shrew S. isodon — 17% and the masked shrew S. caecutiens — 14.5%. The years with minimum (2002, 2003, 2009) and maximum (1994, 2015) abundance values are noted. Using the R software environment, the authors analyzed the dependence of species abundance on time using the linear regression method (autocorrelation, bootstrap). The dependence of abundance on time was revealed in Cl. rutilus. The peaks of increase and decline in the number of small mammals were examined and summarized by year: 2000 (53.2%) and 2014 (68%). The analysis revealed the interdependence of the number of rodents and insectivores mainly on climatic conditions, the abundance of food supply and fruiting of tree and shrub species.
Key words
Altai State Nature Reserve, monitoring, population dynamics, Rodentia, Eulipotyphla, program R, ecosystem.
Acknowledgments: The work was carried out and published within the framework of the research project of the state assignment of the Ministry of Natural Resources of the Russian Federation “Study of the natural course of processes and phenomena in order to ensure the preservation of the natural environment, including natural ecological systems, objects of flora and fauna in the Altai Nature Reserve. Data analysis for 2022, data collection for 1976—2015” (No. 1-22-2-1), and within the framework of the state assignment of the CEPF RAS (Registration number 1022090800034-7-1.6.19) in accordance with the Decree of the Government of the Russian Federation No. 2515-r dated September 2, 2022 in order to implement the most important innovative project of national importance aimed at creating a unified national monitoring system for climatically active substances
For citation:
Chertkova E. P. Analysis of long-term population dynamics of small mammals in forest ecosystems of the Altai State Nature Reserve. Vestnik of Orenburg State Pedagogical University. Electronic Scientific Journal, 2024, no. 1 (49), pp. 191—210. DOI: https://doi.org/10.32516/2303-9922.2024.49.10.
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