中文摘要：

从隐蔽物、水源、人为干扰等多个影响因素确定了扎龙自然保护区丹顶鹤的适宜生境，并分析了20世纪80年代以来丹顶鹤适宜生境的动态变化过程。结果表明：自1979年以来，扎龙自然保护区丹顶鹤适宜生境面积不断萎缩，破碎化现象严重，对于丹顶鹤的生存极为不利。适宜生境退化是由于天然降水的波动，但最主要还是人为活动干扰所致。虽然保护区内适宜生境呈现明显的退化，调查表明丹项鹤的数量却逐年增加，一方面是丹顶鹤的数量还远远未达到保护区湿地的承载量，另一方面可能是丹顶鹤对于退化的生境具有适应性反应。

英文摘要：

The suitable habitat for Red-crowned Crane is determined in terms of shelter, water source and human disturbances. The dynamic change of suitable habitat during 1979 and 2000 was analysed. Result showed that the area of suitable habitat for Red-crowned Crane in Zhalong Natural Reserve had gradually decreased since 1979, and the fragmentation degree of the suitable habitat became more severe, which was extremely disadvantageous to the survival of Red-crowned Crane. The degradation of suitable habitat was caused by rainfall fluctuation, especially by human disturbances. Although the suitable habitat for Red-crowned Crane in Zhalong Natural Reserve showed obvious degeneration, the amount of Red-crowned Crane gradually increased, which indicates that maybe the amount of Red-crowned Crane is far away from the carrying capacity of Zhalong Natural Reserve, or the Red-crowned Crane has adaptive responses to the degradated habitats.