| Abstrakt: |
Despite the large number of works performed on the bird fauna of Inner Asia, its dynamics is still very poorly studied. First of all, this is due to the complexity of atmospheric circulation processes, which determine the overall climate dynamics. Strong warming in Northern Asia is very uneven. There are large regions where these processes are more intensive and Eastern Siberia belongs to such regions of Inner Asia. The overall level of warming here is 1.9° C/100 years or even higher, compared to its average value for the northern hemisphere of 0.7° C/100 years. Changes in atmospheric circulation associated with the dynamics of solar activity led to the formation of strong, prolonged and extensive droughts and prolonged dry periods in Central Asia. This resulted in mass evictions of birds and shifts of their areas far to the north. The birds of shallow intrazonal lake-wetland ecosystems were the most sensitive to the high level of warming. The mass wave of their evictions occurred a decade earlier than for species not closely related to aquatic ecosystems. The subsequent wave included coastal birds of deep-water lakes, and then birds of local forest ecosystems of steppes and deserts began to be evicted. The most resistant to area drying were the native bird species of steppes and deserts. Among them only flights to the northern borders of their areas were noted. Obviously, the modern level of warming is not yet sufficient for strong changes of their areas. The strong changes of areas and redistribution over the territory of birds of important national economic importance or requiring special protection cause the need to develop special approaches to the organization of their protection and rational use under the new climatic conditions. [ABSTRACT FROM AUTHOR] |
