Helictotrichon krylovii (Pavl.) Henrard. coenopopulations state in the upper flow of Yana river (north-east Yakutia)

The northernmost steppe communities in the Verkhoyansk region represent unique landscapes. Nowadays the steppe communities in the Yana River basin suffer from grazing and anthropogenic load. The results of the study of Helictotrichon krylovii (Pavl.) Henrard. coenopopulations (CP) state are given. Of 14 studied CPs 4 CPs are estimated as least endangered, 7 CPs are nearly considered to be endangered, and 3 CPs are in the state dependant on conservation activity. Required measures on conservation of steppe communities in the Upper Yana River basin are given.