On characteristic of stenoecic grass coenopopulations in communities of the middle Lena river valleys (Central Yakutia)

The state of coenopopulations of several stenoecic grass species ( Stipa krylovii, Agropyron cristatum и Cleistogenes squarrosa )under conditions of Central Yakutia has been studied including the ecological estimation of communities and basic features of ontogenetic structure. The analysis of seed quality from different coenopopulations has been made.