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Contemporary Problems of Ecology

2002 year, number 4

Comparative Characteristics of Some polygonal Plant Communities Within the Yamal Arctic Tundra Sub-zone

N. I. ANDREYASHKINA, N. V. PESHKOVA

Abstract

An analysis of floristic similarity between some polygonal communities and their elements  with respect to the moisture gradient of the ecotopes (arctic tundra subzone) has been carried out. It was found that the vegetation cover of adjacent microrelief elements was formed as a functionally whole entity. Probably, it is only in plain habitats of the watershed (polygonal tundras) that severe climatic conditions determine a rigorous selection of species.