Spatial structure and species diversity of black alder forests of Nerusso-Desna poles'e.

摘要

The black alder (Alnus glutinosa) communities in the area of the rivers Nerussa and Desna, south of Bryansk, Russia, are characterized by large species diversity. The cause of such diversity is the complicated spatial structure of black alder communities. Spatial structure is presented by five elements (microsites) distinguished by size, time of existence, causes of origin, and ecological conditions. Differences in ecological conditions between various microsites cause differences in species composition.