Institut für Biologie der Martin-Luther-Universität Halle-Wittenberg


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Document Type



Erforschung biologischer Ressourcen der Mongolei (2005) 9: 59-70.

Proceedings of the symposium ”Ecosystem Research in the Arid Environments of Central Asia: Results, Challenges, and Perspectives,” Ulaanbaatar, Mongolia, June 23-24, 2004.


Copyright 2005, Martin-Luther-Universität. Used by permission.


Composition, abundance, distribution, and diversity of oribatid mite communities were investigated at five study areas in Eastern Mongolia. A total of 88 species of oribatid mites were recorded from the studied areas. The largest number of species (51 spp.) was found in the habitats of river valleys, while the plain steppe which covers the largest area contained the lowest species richness (24 spp.). Three other sub-regions with similar landscape types show approximately the same species richness (39 to 45 spp.), although they are located relatively far from each other. The oribatid mite faunas of all sub-regions were essentially similar to each other.

The abundances of oribatid mites were higher in mountain-steppes (5,240 to 9,800 ind./m2), and lower in the plain steppe and river basins (3,520 to 3,535 ind./m2). Oribatid mite communities were characterized by species with relatively similar abundances. The results of species diversity and evenness indices indicate species-rich assemblages with low dominance.