扎龙湿地丹顶鹤繁殖生境质量变化

基于1996和2004年扎龙湿地丹顶鹤生境因子专题图,通过建立生境适宜性模型和种群格局最邻近体模型,定量分析了扎龙湿地丹顶鹤繁殖生境质量的变化.结果表明：研究期间,扎龙湿地丹顶鹤繁殖适宜生境经历了面积丧失和功能丧失过程;2004年,研究区内丹顶鹤繁殖适宜性生境已大量丧失,核心区繁殖适宜生境已经严重斑块化.丹顶鹤繁殖生境选择行为对生境质量变化的响应表现为两个过程：一是丹顶鹤巢址不断向核心区集中的过程,二是在核心区的分布格局经历了从均匀分布到成群分布的生态过程.

Changes of reproduction habitat quality of red-crowned crane in Zhalong wetlands

Based on the maps of habitat factors in Zhalong wetlands in 1996 and 2004, two models called habitat suitability index model and nearest neighbor analysis model were established to quantitatively analyze the changes of reproduction habitat quality of red-crowned crane in Zhalong wetlands. The results showedthat in 1996-2004, the suitable reproduction habitats of red-crowned crane in the wetlands experienced both area loss and functional loss. By the end of 2004, the suitable habitats in the study area lost greatly, and those in core area undergone serious fragmentation. Consequently, the habitatselection behaviors of red-crowned crane responded in two ways: one was the centralization of nests towards core area, and the other was the spatial distribution pattern changed from uniform to aggregative.