Spatiotemporal characteristics of bird diversity in Nanxi District,Yibin City,Sichuan Province
Nanxi District is located in the key ecological barrier area in the upper reaches of the Yangtze River,and its current situation of biological resources is an important basis for reflecting the quality of regional ecological environ-ment.From January 2023 to March 2024,a field survey targeting at bird diversity was conducted in Nanxi District using line transect method.In total,combined with literature data,we recorded 224 bird species belonging to 56 families and 17 orders in Nanxi.The results showed that there are 1 and 29 species of class Ⅰ and Ⅱ nationally key protected wild birds,respectively,as well as 2 species endemic to China.In the temporal dimension,the number of bird species is spring＞autumn＞winter＞summer,the number of individuals is winter＞autumn＞spring＞summer,the Shannon-Wiener index is autumn＞winter＞summer＞spring,and the Peilou evenness index is summer＞autumn＞winter＞spring.In the spa-tial dimension,the number of bird species and Shannon-Wiener index are both forest＞wetland＞shrub and meadow＞ag-ricultural land＞residential area,the number of individuals is forest＞shrub and meadow＞wetland＞agricultural land＞residential area,and the Peilou evenness index is residential area＞forest＞wetland＞shrub and meadow＞agricultural land.The results indicate that the structure of bird community is different among seasons and habitats,with forest and wetland being the most important habitats for maintaining bird diversity.Our findings suggest that it is necessary to focus on the protection of forest and wetland in the region while carrying out continuous monitoring of birds in this region.
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万方数据
