Effect of Forest Mosaic on the Functional Diversity of Earthworms (Oligochaeta, Lumbricidae) in the Forest-Steppe Belt of the Ob River Region (Novosibirsk Oblast)

Pub Date : 2024-07-27 DOI:10.1134/s1995425524700331

S. A. Ermolov

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Abstract

This paper discusses earthworm (Lumbricidae) populations inhabiting forb–fern pine forests and fern birch–aspen forests prevailing in the forest-steppe belt of the Ob River region (Novosibirsk oblast) in relation to the forest mosaic. A detailed analysis of the structure of earthworm complexes has made it possible to identify individual species and living forms biotopically confined not only to certain forest types, but to forest microsites as well. Pine forests are mostly predominated by Asian earthworm species, while birch–aspen forests are mostly predominated by cosmopolitans. Differences between earthworm populations inhabiting various microsites in population density and biomass are more pronounced in forest openings than in undercrown and intercrown spaces, especially in pine forests. An analysis of earthworm populations inhabiting fallen deadwood has made it possible to identify distinctive features of their structure: in pine forests, incomplete deadwood earthworm complexes complement soil earthworm complexes; in birch–aspen forests, fallen deadwood represents a distinct microsite with a fully featured earthworm complex.

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森林镶嵌对新西伯利亚州鄂毕河地区森林草原带蚯蚓（寡毛目，褐蚯蚓科）功能多样性的影响

摘要本文讨论了栖息在鄂毕河地区（新西伯利亚州）森林草原带盛行的禁止-蕨类松树林和蕨类桦树-杨树林中的蚯蚓（Lumbricidae）种群与森林镶嵌的关系。通过对蚯蚓群结构的详细分析，可以确定不仅局限于某些森林类型，而且局限于森林微生境的个别物种和生物形式。松树林中主要是亚洲蚯蚓物种，而桦树-杨树林中主要是宇宙蚯蚓。栖息在不同微生境中的蚯蚓种群在种群密度和生物量方面的差异在林间空地比在树冠下和树冠间空间更为明显，尤其是在松树林中。通过分析栖息在倒伏枯木中的蚯蚓种群，可以确定其结构的显著特点：在松树林中，不完整的枯木蚯蚓群是对土壤蚯蚓群的补充；在桦树-杨树林中，倒伏枯木是一个独特的微生境，具有完整的蚯蚓群。

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