TESTATE AMOEBAE IN THE FOODPLAIN OF THE PECHORA RIVER                                      (SHIZHIM SETTLEMENT, PECHORA-ILYCH RESERVE)

Komarov Aleksandr Aleksandrovich, Postgraduate student, Penza State University (40 Krasnaya street, Penza, Russia), alek.89@inbox.ru
Stojko Tamara Grigor'evna, Candidate of biological sciences, professor, sub-department of zoology and ecology, Penza State University (40 Krasnaya street, Penza, Russia), tgstojko@mail.ru
Mazei Natal'ya Grigor'evna, Candidate of biological sciences, associate professor, Institute of Water Problems of the Russian Academy of Sciences (3 Gubkin street, Moscow, Russia), natashamazei@mail.ru
Komarova Ekaterina Valentinovna, Postgraduate student, Penza State University (40 Krasnaya street, Penza, Russia), ekaterina-log@inbox.ru
Malysheva Elena Aleksandrovna, Candidate of biological sciences, senior staff scientist, Penza State University (40 Krasnaya street, Penza, Russia), elenamalysheva@list.ru
Mazei Yuriy Aleksandrovich, Doctor of biological sciences, professor, sub-department of hydrobiology, Lomonosov Moscow State University (1 Leninskie gory street, Moscow, Russia), yurimazei@mail.ru

593.1

Background. Testate amoebae form specific communities in freshwater, soil and moss habitats. However, it is still unclear how do certain types of communities transform into other along environmental gradients? The aim of the article is to investigate testate amoeba communities along a floodplain gradient in the outskirts of Shizhim settlement on the left bank of the Pechora River.
Materials and methods. The data were collected in July 2010 in the following habitats: gravel on the riverbank, willow bushes, a pasture with rare aspen trees, a broad-leaved forest, a tall grass meadow, an area of fir-spruce taiga.
Results. Most samples featured widely distributed paedo- and eurybiont species from the genera Centropyxis, Plagiopyxis, Trinema, whereas bryobiont species from the genus Nebela displayed high abundance in gravel. Richness of spicies was minimal on a spatially homogenous tall-grass meadow and much higher in other habitats with maximal values in most spatially heterogeneous areas (on gravel).

testate amoeba, floodplain, the Pechora River, Pechora-Ilych Reserve.

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