Long-term dynamics of the summer birds communitits in high mountains of Barguzinskiy ridge (North-East Pribaikalye)

In work results of 23-years monitoring of bird population in high-mountainous part of Barguzinskiy ridge are presented, the leading part of abiotic factors of environment during annual formation of the feathery communities is shown. Dynamics of number of the majority kinds of birds in different high-altitude belts of high mountains is statistically independent, different kinds unequally react to a situation developing annually. Formation of local birds communities in many respects is defined by external fac-tors of the environment, first of all, such as heat supply and the sum of deposits in the spring and in the beginning of summer.