| 摘要: |
| 鄱阳湖是我国最大的淡水湖泊。每年秋冬枯水期，在赣江和修水入湖三角洲前缘，由草滩-泥滩-积水洼地组成的湿地生态环境为越冬候鸟提供了良好的栖息条件。调查表明，高程12-13m低地最适宜候鸟越冬生存。三峡建坝后，10月份水库蓄水长江下泄流量减少，引起鄱阳湖的提前退水和滩地提前显露，虽使动物性饵料略有减少，但对食草候鸟影响不大。人类提前对草滩资源利用和利用下限的扩大，使候鸟隐蔽条件变差。 |
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| DOI：10.18307/1989.0107 |
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| Eco-environment of wintering habitat of migratory birds in poyang lake and prediction of impacts of the theer-gorges project on it |
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Zhu Haihong
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Nanjing Institude of Geography and Limnology, Academia sinica
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| Abstract: |
| Poyang lake is the largest freshwater lake in China.During the low water level in autumn and winter, ecological environment of wetland in the delta front of the Ganjiang River consists of grass bank, muddy beach and back depression, providing favourable conditions for migratory birds to survive their winter. The investigation shows that the wetland at altiude of 12-13m is the most favourable place for migratory birds7 wintering. However the building of Three-gorges Reservoir may alleviate the discharge of the Changjing River in October, thus, may lead to the falling of the water level and to the exposedness of the lake bcach earlier than expected. The above-mentioned results exert less influence on herbivorous birds, but may reduce the numbers of animal foods slightly, the grass bank resources may be used not only earlier, but alse fully, because of the expanding of the lake beach, but the shelter condictions for migratory birds' wintering may get worse. |
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