嘉陵江中游冬季水鸟的调查

目前嘉陵江“全江渠化、梯级开发”水电工程正在区段性实施中,因而嘉陵江出现了已经蓄水发电的渠化江段和尚未进行改造的江段。2004年12月~2005年2月选取嘉陵江中游有代表性的渠化江段和尚未进行改造的江段用固定样线法对沿江水鸟进行了调查,共记录了水鸟38种,其中留鸟13种,占34.2%;冬候鸟25种,占65.8%,与20世纪80年代以前相比,冬季水鸟减少了10种。统计分析表明,已经渠化的江段和尚未进行改造的江段相比水鸟的种类及密度存在显著差异,其原因主要是水电工程改变了沿江水鸟的栖息环境。

Investigation on Wintering Waterfowl at the Middle Reaches of Jialingjiang River

The Canalization and Waterpower project has been constructing in Jialingjiang River.Dams that built in the river have changed the environment at certain location that may influence on the waterfowl diversity and abundance.A survey was conducted at two sections,one with power dam and the other not,in the middle reaches of Jialingjiang River from December 2004 to February 2005.Total of 38 species were recorded during the survey,33 species at the section with dam and 35 birds at the part without dam.Among those 13(34.2%)are residents at the study area;25 species(65.8%) are winter visitors.Significant difference at population abundance was found in 14 birds between the two sections.In addition,the birds recorded this time were 10 species less comparing with the records in the year of 1980s.The reason for the difference may possibly due to habitat change caused by power dams.