SPECIES COMPOSITION, STRUCTURE AND SEASONAL DYNAMICS OF TESTATE
AMOEBA COMMUNITY IN NIKOLSKOYE BOG (MIDDLE VOLGA REGION) 

Utkina (Trulova) Alisa Sergeevna, Candidate of biological sciences, senior researcher, Institute of fundamental and applied research, Penza State University (40 Krasnaya street, Penza, Russia), alisa.trulowa@yandex.ru
Mazei Yuri Alexandrovich, Doctor of biological sciences, professor, sub-department of zoology and ecology, Penza State University (40 Krasnaya street, Penza, Russia), yurimazei@mail.ru

593.11

Background. The aim of the study is to investigate species diversity, structure and seasonal dynamics of testate amoeba community in Nikolskoye bog, located in Kuznetsk District of Penza Region.
Materials and methods. Materials were collected monthly from May to November during 2011–2012 within four biotopes: 1) green mosses, located between sedge tussocks in the edge zone; 2) bottom of the stream, divided fen in the edge and bog in the center; 3) Sphagnum hummock in the bog; 4) Sphagnum hollow in the bog.
Results. One hundred and nineteen testate amoeba taxa have been identified. All the taxa are wide spread and belong to the soil-moss ecological group. Abundance varied from 1,1 to 14,7 thousands of individuals per gram of absolutely dry substratum. Species composition and community structure related with the type of substratum and its moisture content.
Conclusions. The seasonal changes in community structure are more prominent in the bog than in the fen. The changes occurred in the bog are not connected with the variability of moisture content. Whereas in other biotopes there is a significant positive correlation between moisture and abundance. Despite of changes in community composition, the diversity indices (Shannon and Pielou) remain stable in the course of annual community development.

testate amoebae, community structure, seasonal dynamics, bog, peatland, Middle Volga Region.

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