ZOOPLANKTON COMMUNITIES OF BOGGY LAKES IN THE «SURSKAYA SHISHKA» HIGHLANDS
(MIDDLE VOLGA TERRITORY)

Stoiko Tamara Grigor'evna, Candidate of biological sciences, professor, sub-department of zoology and ecology, Penza State University (40 Krasnaya street, Penza, Russia), tgsojko@mail.ru
Burdova Viktoriya Aleksandrovna, Postgraduate student, Penza State University
(40 Krasnaya street, Penza, Russia), hydro-dnu@mail.ru
Mazei Yuri Aleksandrovich, Doctor of biological sciences, professor, sub-department of zoology and ecology,
Penza State University, (40 Krasnaya street, Penza, Russia), yurimazei@mail.ru

574.5

Background. Zooplankton communities in acidic environments (e.g. boggy lakes with quagmires) are characterised by peculiar composition and structure. The aim of the study is to describe and compare characteristics of zooplankton in two boggy lakes with Sphagnum quagmires of different successional stages.
Materials and methods. Material was collected in 2004 and 2008 within the Surskaya shishka highlands (Middle Volga territory). Samples were taken with the aid of Apstein net.
Results. In the lake that has more developed quagmire forty-nine species were identified, whereas in the second one 32 species were found. Species richness increased from spring towards autumn in accordance with the increasing of temperature from 17 to 26 centigrade degrees. In the first lake community structure drastically changed during the season. It starts from the prevalence of copepods nauplii (65 % of the total abundance). In summer Heterocope saliens (9 %) and Streblocerus serricaudatus (17 %) have also high abundances.
Conclusions. Zooplankton communities in two boggy lakes of different stages of transformations into the bogs differ by the species composition but not the community structure. However, both structure and composition of dominants are affected by the stage of seasonal succession but not the type of the water body.

zooplankton, community structure, Privolzhskaya highlands, boggy lakes.

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