The breeding ecology and population dynamics of the little egret (Egretta garzetta) in Dayu Islet, Xiamen Egret Natural Reserve

厦门白鹭自然保护区包括鸡屿岛和大屿岛两部分。作者自1999年3月至2001年7月研究了大屿岛上的白鹭（Egrettagarzetta）繁殖生态和种群动态。 非繁殖季节，大屿岛西侧滩涂是白鹭的“择偶场”；繁殖季节，大屿岛为白鹭群体繁衍、觅食和栖息提供了适宜的条件。 在大屿岛繁殖的鹭类，1999年共4112只，营巢区面积为1.14×106m2，其中夜鹭（Nycticoraxnycticorax）1848只，白鹭1304只，池鹭(Aroleolabacchus)896只，牛背鹭(Bubulcusibis)56只和黄嘴白鹭(Egrettaeulophotes)8只。2000年岛上繁殖鹭类共572只...Xiamen Egret Natural Reserve includes two parts: Jiyu Islet and Dayu Islet. The breeding ecology and population dynamics of the little egret (Egretta garzetta) were studied in Dayu Islet from March 1999 to July 2001. The little egret used the marshland next to the west of Dayu Islet as a “lek” in non-breeding season, and used Dayu Islet as the nesting, reproducing and feeding site in breedin...学位：理学硕士院系专业：生命科学学院生物学系_动物学学号：19982600

The Spatial Distribution of Breeding Ardeidae in Dayu Island, Xiamen Egret Natural Reserve

采用样方法 ,根据生态学原理 ,分析厦门白鹭自然保护区大屿岛鹭类繁殖的空间分布规律 .结果表明 :鹭类在大屿岛繁殖时 ,具有明显的水平分布特征 .夜鹭 (N ycticorax nycticorax)主要分布于核心区中部偏南的中央大片区域 ;白鹭 (Egretta garzetta)各处都能分布 ;池鹭 (Aroleola bacchus)仅分布于核心区的南北 ;牛背鹭 (Bubulcus ibis)和黄嘴白鹭 (Egretta eulophotes)只分布在核心区中部偏北的局部区域 ,和白鹭、夜鹭共栖一处 .鹭类在大屿岛上的繁殖也具明显的垂直分布现象 .夜鹭巢位最高 ,白鹭、牛背鹭和黄嘴白鹭的巢居中 ,而且三者巢位相近 ;在白鹭和池鹭营巢在同一树上的情况下 ,池鹭的巢处于上层 .对鹭类集群繁殖时的空间分布现象的产生原因也进行了探讨With sampling method and ecological theory, the spatial distribution of Ardeidae in Dayu Island, Xiamen Egret Natural Reserve were investigated and discussed. The results show that there is a horizontal distribution in colonial breeding Ardeidae. Nycticerax nycticorax mainly distribute on southern region in the center of the core area; Egretta garzetta breed in all regions of the core area; Ardeola bacchus only locate their nests on both northern and southern sides of the core area; Bubulcus ibis and Egretta eulophotes place their nests on the North of the core area, sharing the place with Egretta garzetta and Aroleola bacchus . During breeding period, the vertical distributions also appear. Nycticorax nycticorax locate their nests on the tiptop of the forest; the nests of Egretta garzetta, Bubulcus ibis and Egretta eulophotes are in the middle. When Egretta garzetta and Aroleola bacchus nest on the same tree, the latter usually nest in higher place.福建省自然科学基金资助项目 (D9910 0 0 3