Birds Resources And Diversity Of Mountainous Basins Of Nujiang River And Lantsang In Tibet

The geographical unit of mountainous basins of Nujiang River and Lantsang in Tibet is located in the east of Tibet.Its favorable natural environment and climatic conditions make the biodiversity here very rich.During 30 July to 31 August,2014 and 30 April to 28 June,2015,wu used line transect and point count method to investigate the birds resources of this geographical unit.A total of 250 line transects were applied in 60 quadrats,which were uniformly distributed in research area(5959.66 km2),the side length of each quadrat is 10 km.A total of 181 species and 11300 birds were counted,which belongs to 16 orders,49 families.Of them,116 species belong to Passeriformes,accounted for 64.09% of all birds,species,and 65 species of other orders make the rest,accounted for 35.91%.Resident birds accunt for the largest proportion(63.40%),and there are 15.46% summer migrant,10.82% passing migrant and 10.31% winter migrant.In fauna structure,there are 134(74.03%)cosmopolitan specials,40(22.10%)oriental species,7(3.87%)palacarctic species.There are 3 species under first-level national protected birds,and 21 species under second-level national protected birds,8 endemic species of China.And there are 4 species of recorded birds listed in CITES appendices?,21 species of recorded birds listed in CITES appendices ?.In this geographical unit,the number of bird species of four kinds of habitats in descending order are: forest(126),shrubwood(94),meadow(39),wetland(56).The diversity of bird communities is measured by Shannon-Wiener index,the high to low sequence is,forest,shrubwood,wetland,meadow.The diversity of bird communities is analyzed by using Simpson index,the high to low sequence is,forest,wetland,shrubwood,meadow.The evenness of bird communities is analyzed by using Pielou index,the high to low sequence is,wetland,forest,shrubwood,meadow.The similarities of different bird communities are analyzed by using Sorenson index.The result show that forest bird community and shrubwood bird community are in the highest similarity.On the basis of the study about the bird community structure and diversity,we put forward some countermeasures for protection of the geographical unit.