Assessment of all groups of animal remains in sediments should precede special investigation of particular groups

Abstract

Remarkably, animal remains in lake sediments represent the entire integrated zoocenosis, as far as its constituents leave skeletal fragments. Recording of all present groups and their quantification are important points in such method. In the absence of general representation of relative importance of all groups, it is impossible to determine to which zoocoenosis the excellent special studies fit in, made, e.g., on cladocerans, chironomids, etc. How to cite this article: Smirnov N.N. 2018. Assessment of all groups of animal remains in sediments should precede special investigation of particular groups // Invert.

Ephippia of the Daphniidae (Branchiopoda: Cladocera) in Late Caenozoic deposits: untapped source of information for palaeoenvironment reconstructions in the Northern Holarctic

“…Deeper sediments have to be excavated by a heavy drilling with gravity corer or piston corer Brendonck, De Meester, 2003), often from special rafts, or from ice; this is complicated and expensive work. But the deep lake long cores are widely used for pollen (Anderson, Lozhkin, 2015), chironomid (Porinchu, Cwynar, 2002;Nazarova et al, 2017), diatom (Laing et al, 1999;Palagushkina et al, 2017), and other types of analysis (Smirnov, 2018). For example the core from El'gygytgyn Lake provides a continuous record of pollen and diatom data since at least the Middle Pleistocene (Nowaczyk et al, 2002;Cherepanova et al, 2007;Lozhkin et al, 2007).…”