Dynamics of Species Diversity in Small Mammal Communities in Slope Larch Forests on the Northern Coast of the Sea of Okhotsk

IF 0.7 4区环境科学与生态学 Q4 ECOLOGY Contemporary Problems of Ecology Pub Date : 2024-06-04 DOI:10.1134/s1995425524700240

E. A. Dubinin

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Abstract

In 2010–2023, the dynamics of the population abundance and changes in the proportion of species in the community of small mammals (insectivores and rodents) inhabiting a slope larch forest in the vicinity of the city of Magadan (northern coast of the Sea of Okhotsk) was traced. The census of animals was carried out using Gero traps and cone traps (trap-line methods). In total, we analyzed 4700 trap-nights and 15 720 cone-nights. Altogether, 3384 individuals of 9 species belonging to the families of shrews (Soricidae), squirrels (Sciuridae), mice (Muridae), and hamsters (Cricetidae) were trapped. During the considered period, the relative abundance and the amplitude of its interannual fluctuations decreased in the populations of even-toothed shrews (Sorex isodon) and grey red-backed voles (Craseomys rufocanus). The proportion of Laxmann’s shrews (S. caecutiens) and Korean field mice (Apodemus peninsulae) in the community increased 2.6 and 2.5 times, respectively, while the proportion of even-toothed shrew and grey red-backed vole decreased 2.8 times and 3 times, respectively. As a result, about 50% of the individuals in the samples were Laxmann’s shrews and about 30% were northern red-backed voles (Clethrionomys rutilus). This, in turn, led to an increase in the dominance (the Simpson index increased from 0.21 to 0.34), a decrease in evenness (the Pielou index decreased from 0.87 to 0.61), and a significant decrease in the species diversity of the small mammal community (the Shannon index decreased from 1.7 to 1.3; t = 10.90, p < 0.001).

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鄂霍次克海北岸山坡落叶松林小型哺乳动物群落物种多样性的动态变化

摘要 2010-2023 年期间，对居住在马加丹市（鄂霍次克海北岸）附近坡地落叶松林中的小型哺乳动物（食虫动物和啮齿动物）群落的种群数量动态和物种比例变化进行了追踪调查。动物普查采用了格罗诱捕器和锥形诱捕器（诱捕线法）。我们总共分析了 4700 个诱捕夜和 15 720 个锥形诱捕夜。共诱捕了鼩鼱科（Soricidae）、松鼠科（Sciuridae）、小鼠科（Muridae）和仓鼠科（Cricetidae）9 个物种的 3384 只个体。在研究期间，偶齿鼩（Sorex isodon）和灰红背田鼠（Craseomys rufocanus）种群的相对丰度及其年际波动幅度均有所下降。群落中拉克斯曼鼩（S. caecutiens）和朝鲜田鼠（Apodemus peninsulae）的比例分别增加了 2.6 倍和 2.5 倍，而偶齿鼩和灰红背田鼠的比例则分别减少了 2.8 倍和 3 倍。因此，样本中约 50%的个体是拉克斯曼鼩，约 30%是北方红背田鼠（Clethrionomys rutilus）。这反过来又导致了优势度的增加（辛普森指数从 0.21 上升到 0.34）、均匀度的下降（皮鲁指数从 0.87 下降到 0.61）以及小型哺乳动物群落物种多样性的显著下降（香农指数从 1.7 下降到 1.3；t = 10.90，p < 0.001）。

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来源期刊

Contemporary Problems of Ecology 环境科学-生态学

CiteScore

1.40

自引率

12.50%

发文量

审稿时长

6-12 weeks

期刊介绍： Contemporary Problems of Ecology is a multidisciplinary periodical that publishes original works on the following subjects: theoretical and methodical issues of ecology, regional aspects of ecology, regional ecological disasters, structure and functioning of ecosystems, anthropogenic transformation of ecosystems. All basic aspects of modern ecology, including the most complicated interactions between living organisms and their environment, are presented. Some of the journal issues are dedicated to global changes in biological diversity at various levels of organization (populations, species, ecosystems) principles and methods of nature conservation.