COMMUNITIES STRUCTURE AND BIOPRODUCTIVITY OF MACROSOZBENTHOS OF THE KARDASHINSKY LIMAN LAKE

Abstract

In the article, macrozoobenthos organisms communities of the Kardashinsky
liman lake are identified and described in different types of biotopes. The largest in
terms of distribution area is the oligochaeta-chironomids cenosis of Potamothrix
hammoniensis + Fleuria lacustris. It includes 25 species and taxes of a higher rank
of benthic invertebrates, of which 72% are chironomids larvae. It is formed on silt
bottom sediments, which currently occupy 58% of the lake bottom area.
The products and production-biological coefficients of cenosis were
determined. It has been established that mollusks play an important role in the
formation of the water’s production, accounting for more than 80% of the total
benthos. However, they don’t take an active part in the transfer of the energy flow.
The largest energy flow passes through insects (Ephemeroptera, Trichoptera,
Neuroptera) and crustaceans (Mysidae, Gammaridae). Attention is drawn to the
role of benthic organisms of different trophic levels in the transformation of
matter and energy. The components of the energy balance of macrozoobenthos
are calculated.
Key words: macrospineless, communities, trophic structure, production,
production-biological coefficient, energy balance.