Forest vegetation of headwaters of the Amga river (from the mouth to river Hatyrkhay's to the Amga ridge)

Abstract

In this article we presented the results of forestry and geobotanical studies in the upper reaches of the Amga River, which belongs to the Southern region of Yakutia. Materials are collected in 2006 in the riverheads of Amga – from the mouth of its right inflow Khatyrhai to the Amginsky Ridge, almost not studied site of South Yakutia. The study area is unique from the geobotanical point of view, since it is located at the junction of the three floristic districts, two geomorphological provinces, bordered by Olekminsky reserve in Yakutia. On the investigated site the entire area is covered with forest vegetation, where pure and mixed forests are formed. A distinctive feature of the region is the spread of forest communities rare for Yakutia with the presence at the basic evergreen coniferous species. Many communities include rare, endangered and endemic plant species listed in the Red Books of different levels. Materials of article will be a basis for creation of the database of infrequent vegetable communities for the organization of protection actions and also will add not numerous data on a vegetable cover of upper courses of the Amga River.