Ecological consequences of island colonization by southwest pacific birds, I. Types of niche shifts.
Ecological consequences of island colonization by southwest pacific birds, I. Types of niche shifts.
复制标题
西南太平洋鸟类岛屿殖民的生态后果，I.生态位转变的类型。
DOI：
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发表时间：
1970
影响因子：
11.1
通讯作者：
Jared M. Diamond
中科院分区：
文献类型：
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作者：
Jared M. Diamond
西南太平洋岛屿的陆地和淡水鸟类主要来自新几内亚，为研究岛屿入侵的生态后果提供了有利条件。物种贫乏的岛屿上的竞争减少允许一些殖民物种在空间上扩大其生态位，通过占据海拔带，栖息地类型和/或森林的垂直层，它们被物种丰富的岛屿上的其他物种排除在外。向更高海拔的扩展，或从二次生长到森林，尤其频繁。其他殖民者在新几内亚的同类栖息地变得更加丰富。改变饮食习惯是罕见的。觅食技术的变化，主要是那些殖民者，已被隔离足够长的时间，经历了形态分歧。大约一半的殖民人口没有经历生态位的转变。
The land and fresh-water birds of the southwest Pacific islands derive mainly from New Guinea and offer a favorable situation for studying ecological consequences of island invasions. The reduction of competition on species-poor islands permits some colonizing species to expand their niches spatially, by occupying altitudinal bands, types of habitats, and/or vertical strata of the forest from which they are excluded by other species on species-rich islands. Expansions to higher altitudes, or from second-growth into forest, are especially frequent. Other colonists become more abundant in the same type of habitat preferred on New Guinea. Instances of a change in diet are rare. Changes in foraging technique are noted mainly for those colonists that have been isolated long enough to have undergone morphological divergence. Approximately half of the colonizing populations experience no niche shift.