Abstracts

Diversity of the Fauna

About 2500 variants of bird communities of East-European (EEP) and West-Siberian (WSP) plains are overinvestigated by the method of automatic classification. On the non-build-up land on the type’s level the regional differences of the northern overtype cluster are legibly investigated. More southern forest, high-moor, floodplain, and partly meadow–steppe variants of both plains have more resemblence and are joined in general groups of different rank. Forest-field bird communities on the contrary, differ on the class’es level: Siberian communities compose the forest type, European ones compose meadow-steppe type.

The zone-regional specificness is legibly investigated in towns and villages: north-siberian ornitocomplexes differ frome all others. All European synanthopic bird communities are similar with each other and both with Siberian analogs from middle taiga to steppe. Their differentiation, as regional, as zonal-subzonal is traced on the more low levels of consideration. The ornitocomplexes of careers, bings, and also of throngs are joined in the unique and indivisible types, independently of their regional and zonal belonging. Northern ofertype cluster of aquatic and circumaquatic communities is represented for both plains by the unique type of communities, the middle overtype cluster is devided on four types with the legibly pronounced regionality.

The comparision of general classification with previous ones, composed earlier, separately for each plain, have shone, that with the increase of the amount of data the most degree of generalization is traced: the particular groups of communities unite in the more large types. This is connected with more fragmentation of European forests. The zonality of ornitocomplexes of both plains as a whole approachs to the landscape zonality, but the boundaries by itselfs are partly don’t coinside. So, in the general classification only the communities of subzone of arctic tundra, and tundra ornitocomplexes of northern subarctic tundra in the limits of WSP are apportioned as the tundra type. The other communities of subarctic tundra, all ornitocomplexes of forest-tundra and northern taiga of WSP, and all subarctic and forest-tundra communities and also of the open, and mosaic northern taiga habitats of EEP have the forest-tundra image. As the result, in the general classification (to compare it with particular ones), the overtype boundaries of ornitocomplexes are shifted on the one subzone northwards on the EEP in relation to WSP.

This work is supported by RFFI.

Note. Abstracts are published in author's edition

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