Diversity of planktonic fauna of the Pechora River Delta
E. B. Fefilova, O. N. Kononova
Institute of Biology of Komi Scientific Center of UrB RAS, Syktyvkar, Russia
Keywords: зоопланктон, индексы видового разнообразия, редкие виды, богатство фауны, термофильные гидробионты, zooplankton, indexes of biodiversity, species structure, rare species, richness of fauna, thermophilic hydrobionts
Abstract
The structure and diversity of zooplankton of the mouth part of the largest river in the European North - Pechora is studied. The river delta, an adjacent piece of the Pechora course, estuary firth (the Korovinsky bay) and lakes on its northern coast - in Timan Tundra belong to the region under study. In the delta of the Pechora River the planktonic fauna was rich and unique on structure, in which rotifers (105 species) and cladocerans (55 species) prevailed. Thermophilic invertebrates are presented in zooplankton, but cold-loving are revealed. Among copepods brackish taxa and also a possible recent invader to the region ( Eurytemora sp.) are found. The analysis alpha- and beta-diversities of planktonic communities of the studied region has showed that in the delta water bodies and lakes in general indexes are the highest. That are caused, in our opinion, variety of environmental conditions and also features of gradients of the dominating environmental factors: temperature, etc.
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