Study On Avifauna And Community Structure Of Birds On Aershan City

The survey on avifauna and community structure of birds were carried out with the method of line transect during April2011to March2012on Aershan City.A total of103bird species belonging to13orders and32families were counted. Of which,60are summer visitors,32are residents,6are passage migrants, and5are winter visitors. Breeding birds are the main of the local avifauna, and summer visitors took up the dominating species of the breeding birds.15birds are listed as grade II national key protected species. Avifauna of Aershan city have some reciprocal permeation and intermediate characteristics of northeast between Mongolia-Xinjiang region, have some reciprocal permeation and intermediate characteristics of south Daxinganling between north Daxinganling region. Aershan is an important breeding ground for the forest birds and the grassland birds, and is the important point on the passage of migratory birds.Aershan has an important position in the protection of migratory birds. According to the habitat distributive coefficent of birds,60species, which represented58.25%of whole species and constitute the main part of bird communities in all the six habitats, were classified as Neutral distribution pattern. The species composition of bird peaks in spring and autumn, with stationary phase in summer and winter. The bird Diversity indexes were diverse among different habitats in order:Woodland> Grassland> Wetland> Mountain> Farmland> Residential area. With the intensification of the degree of human activity, the bird diversity is significantly lower in the human regular activities habitats and the near-by town habitats. The survey results revealed that the impact of urbanization has been starting to show, and human activities affected the avifauna significantly.