Forest snail diversity and its environmental predictors along a sharp climatic gradient in southern Siberia
| Autor: | Michal Horsák, Lucie Juřičková, Veronika Horsáková, Milan Chytrý, Adéla Pokorná, Arnošt L. Šizling, Petr Pokorný |
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| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
biology Pleistocene Hemiboreal Ecology 010604 marine biology & hydrobiology Fauna Vegetation classification Snail 15. Life on land biology.organism_classification 010603 evolutionary biology 01 natural sciences Geography biology.animal Gastropoda Temperate climate Species richness Ecology Evolution Behavior and Systematics Nature and Landscape Conservation |
| Zdroj: | Acta Oecologica. 88:1-8 |
| ISSN: | 1146-609X |
| DOI: | 10.1016/j.actao.2018.02.009 |
| Popis: | Diversity patterns of forest snail assemblages have been studied mainly in Europe. Siberian snail faunas have different evolutionary history and colonization dynamics than European faunas, but studies of forest snail diversity are almost missing from Siberia. Therefore, we collected snails at 173 forest sites in the Russian Altai and adjacent areas, encompassing broad variation in climate and forest types. We found 51 species, with a maximum of 15 and an average of seven species per site. The main gradient in species composition was related to soil pH, a variable that also positively correlates with snail abundances. The second gradient was associated with climate characteristics of winter. We observed significant differences in both species richness and composition among six forest types defined based on vegetation classification. Hemiboreal continental forests were the poorest of these types but hosted several species characteristic of European full-glacial stages of the Late Pleistocene. A high snow cover in Temperate coniferous and mixed forests, protecting the soil from freezing, allowed the frost-sensitive large-bodied (>10 mm) species to inhabit this forest type. In contrast to most of the European snail assemblages studied so far we found that the factors responsible for the variation in species richness differed from those driving species composition. This may be attributed to the sharp climatic gradient and the presence of the cold-adapted species typical of the Pleistocene cold stages. We suggest that southern Siberian forests hosting these species can serve as modern analogues of full-glacial forests in periglacial Central and Eastern Europe. |
| Databáze: | OpenAIRE |
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