Crustaceans in the meiobenthos and plankton of the thermokarst lakes and polygonal ponds in the Lena River Delta (Northern Yakutia, Russia): species composition and factors regulating assemblage structuresстатья
Статья опубликована в журнале из списка Web of Science и/или Scopus
Аннотация:Information about invertebrates in the low-flow water bodies of northeastern Siberia isfar from complete. In particular, little is known about crustaceans—one of the main componentsof meiobenthic and zooplanktonic communities. An open question is which environmental factorssignificantly affect the crustaceans in different taxonomic and ecological groups? Based on the datacollected on the zooplankton and meiobenthos in the tundra ponds in the southern part of the LenaRiver Delta, analysis of the crustacean taxocene structure was performed. In total, 59 crustaceanspecies and taxa were found. Five of these are new for the region. The species richness was higherin the large thermokarst lakes than in the small water bodies, and the abundance was higher insmall polygonal ponds than in the other water bodies. Variations in the Cladocera assemblages weremainly affected by the annual differences in the water temperature; non-harpacticoid copepods weregenerally determined by hydrochemical factors; and for Harpacticoida, the macrophyte compositionwas significant. Three types of the crustacean assemblages characteristic of different stages of tundra lake development were distinguished. The hypothesis that the formation of crustacean taxocenes in the Lena River Delta is mainly determined by two types of ecological filters, temperature and local features of the water body, was confirmed.
