Specific features of the microspatial distribution of soil testate amoebae in the forests of the Middle Volga region

Autor: Yu. V. Blinokhvatova, Yu. A. Mazei, E. A. Embulaeva
Rok vydání: 2011
Předmět:
Zdroj: Arid Ecosystems. 1:46-52
ISSN: 2079-0988
2079-0961
DOI: 10.1134/s2079096111010069
Popis: The microspatial (intraparcel) distribution of soil testate amoebae was studied in 12 heterogeneous oak forests and 7 pine forests of the Middle Volga region. Twenty-five species and forms of testate amoebae were discovered in the oak forests, while 36 were found in the pine forests. The richness, diversity, and structural evenness of species; spatial heterogeneity; and composition of the dominant complex of species do not change significantly within the undercrown spaces of the oak forests and different microbiotopes of the pine forests. From the tree-trunk base spaces through the undercrown to the intercrown areas of the oak forests, the abundance of centrostomic testate amoebae decreases and the abundance of plagiostomic forms increases. In addition, the abundance of the organisms decreases, and the composition of a complex of subdominant species changes. Terricolous forms of xenosome-shell rhizopods are characteristic of the pine forest litter, but small eurybiontic amoebae with shells built of endogenously forming idiosoms are typical for the moss cushions of Pleurozium schreberi and the fruticose lichens Cladonia sp. The regularities of the microspatial community heterogeneity of the soil testate amoebae are defined not so much by the ecological features of the particular species as by the response of the community as a whole to the microstructural heterogeneity of the biotope. As a result the populations of selected species show distinct preferences in different biogeocenoses (oak forests, pine forests).
Databáze: OpenAIRE
Externí odkaz: