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From 2000 to 2004, a survey was made upon the birds’ distribution status in winter along the water course and the bank of the Changjiang River of the Three Gorges Reservoir. 56 species, belonging to 9 orders and 21 families,are recorded. Among which, 1 species is listed in rank Ⅰ protected species and 3 are listed in rank Ⅱ. Birds recorded can be divided into 4 communities: the natatory birds, the wader, the river-closing birds and the birds inhabiting above the water. These communities differ greatly in reaction...

From 2000 to 2004, a survey was made upon the birds’ distribution status in winter along the water course and the bank of the Changjiang River of the Three Gorges Reservoir. 56 species, belonging to 9 orders and 21 families,are recorded. Among which, 1 species is listed in rank Ⅰ protected species and 3 are listed in rank Ⅱ. Birds recorded can be divided into 4 communities: the natatory birds, the wader, the river-closing birds and the birds inhabiting above the water. These communities differ greatly in reaction to the variation of water environment before and after the water level rising to 139 m. The results indicate:the natatory birds without obvious quantitative fluctuation change the distribution pattern obviously;the waders vary greatly in both quantitative fluctuation and distribution pattern;the river-closing birds and the birds inhabiting above the water decline obviously in quantity and vary distribution clearly.

20 0 0~ 2 0 0 4年 ,对三峡库区长江干流及部分主要支流的冬季鸟类分布状况进行了较为系统的调查。野外调查工作中 ,统计到鸟类 5 6种 ,隶属 9目 2 1科 ,其中国家Ⅰ级保护动物 1种 ,Ⅱ级保护动物 3种。由于不同类群的鸟类对于环境变化的反应差别较大 ,所以 ,将观察到的与水域生境密切相关的鸟类分为游禽类、涉禽类、傍水栖息类和空中傍水栖息类等 4种类型 ,对各类群在 2 0 0 3年三峡水库蓄水至1 3 9m高程前后的种群状况进行分析讨论。结果显示 ,水禽中以雁鸭类为主体的游禽类总体计数差别不大 ;涉禽类数量出现非常明显的变动 ;库区 1 1种傍水栖息类型鸟类总体数量在蓄水前后出现急剧变动 ,下降明显。

 
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