Younger Dryas Cladocera assemblages from two valley mires in central Poland and their potential significance for climate reconstructions

摘要: Two sections of sediment from small oxbow-lake infillings located in different river valleys central Poland were studied by cladoceran analysis order to examine the response aquatic ecosystems Younger Dryas. Lithological and geochemical records, as well chydorid (Chydoridae) ephippia also used reconstruct Dryas climate trends. A high concentration cladocerans, presence Cladocera taxa preferring warmer water, was found. It is likely that local processes oxbow lakes important, because warmpreferring related their habitats development. Yet environmental forces, such influence rivers, habitat modification, macrophyte abundance, eutrophication, not only major factors affect diversity The observation changes composition indicates most occurred changes.