中国画眉科鸟类分布格局探讨

中国现有画眉科鸟类122种,隶属于27属,占我国鸟类总种数的9.15%。通过运用GIS技术处理物种分布数据,研究了中国画眉科鸟类的分布格局和多样性中心。中国画眉科鸟类在水平分布上具有不均匀性,省际单元上云南最多(102种),占绝对优势;在动物地理亚区单元上滇南山地亚区分布最多(80种),其次是西南山地亚区(60种)、喜马拉雅亚区(47种);在垂直分布上,则以700～2700m的海拔地带具有最高的物种多样性。中国画眉科鸟类物种多样性最高的地区位于滇南山地亚区与西南山地亚区的交汇地带—横断山区南端。我国画眉科鸟类主要涉及以下3个分布型:东洋型、喜马拉雅-横断山型和南中国型。

THE DISTRIBUTION PATTERN OF THE BABBLERS (TIMALIIDAE) IN CHINA

China has 122 species of Babblers representing 27 genera, 47% of the world's total. Based on the locality data processed by GIS (geographic information system) , the diversity and distribution of Babblers in China were analyzed: we looked at geographical and elevational distribution, and centers of diversity of Babbers. Babber species in China were not evenly distributed. The result based on administrative regions showed that 102 species were distributed in Yunnan province. The result based on sub-zoogeographical regions showed that 80 species were found in the " South Yunnan Hilly Subregon" , 60 species in "Southwest Mountain Subregion" and 47 speaes in " Himalayan Slope Subregion". The result also showed that most species of Babblers were found between the elevational range of 700-2 700 m. From 100-1 500 m, species diversity increased with altitude, while from range 1 500-4 600 m, the opposite occured. Based on GIS interpolation of local richness data, the center of diversity of babblers was found to be located in south region of Hengduan Mountains. This region is located at the boundary of South Yunnan Hilly Subregion and Southwest Mountain Subregion. The majority species of Babblers in China belong to three distribution patterns, namely the Oriental Type, Himalayan-Hengduan Type and South-China Type.