A COMPARATIVE ANALYSIS OF RECENT SUBAQUEOUS TAPHOCOENOSES OF 24 PONDS LOCATED IN THE SHATURA AND RUZA DISTRICTS, MOSCOW REGION, CENTRAL RUSSIA

摘要

Recent taphocoenoses of 24 small-sized water bodies located in the Shatura and Ruza districts, Moscow Region, central Russia are described based on the results of a complex analysis of algal and invertebrate subfossil remains. Surface sediment samples were collected and analyzed by means of the method proposed by N.N. Smirnov. This method combines algae-zoological and cladoceran analyses. We show that the sediments of the study water bodies differ significantly from the ones formed in larger and deeper lakes. The abundance of testacean shells seems to be a useful tool for estimating the depth and size of extinct water bodies. Cluster (UPGMA) and Principal Component analyses of the presence of cladoceran species divides the water bodies into two groups, this agreeing with their locality. i.e. Shatura and Ruza districts, respectively. The results of these observations could be of help in palaeoecological reconstructions.