Evolution of within-colony distribution patterns of birds in response to habitat structure
Evolution of within-colony distribution patterns of birds in response to habitat structure
复制标题
鸟类群内分布模式对栖息地结构的响应的演变
DOI：
--
复制
发表时间：
2014
影响因子：
2.3
通讯作者：
P. Minias
中科院分区：
文献类型：
--
作者：
P. Minias
长期以来，人们一直认为栖息地结构会影响集群鸟类在其筑巢集群中的分布，但这一假设从未得到正式验证。本研究的目的是测试的栖息地异质性和群体内分布的鹳形目之间的相关演化，通过使用Pagel的一般方法的离散变量的比较分析。分析表明，在均匀生境中物种繁殖的分布（高质量的个人占据中央筑巢位置）的中心-外围梯度占主导地位。这些主要是地面筑巢的larids和spheniscids，其中明确的中央周边模式记录在约。80%的分类群。由于均匀的栖息地提供的巢址的物理质量变化不大，中央筑巢的位置应该在很大程度上是首选，因为他们提供更好的保护，更有效的捕食者检测和威慑的手段。相比之下，中心-外围梯度往往被破坏异质栖息地，其中75%的殖民Ciconiiform物种表现出均匀的分布模式。在这种分布模式下，边缘巢址的高物理质量赋予更高的健身效益相比，低质量的中心网站，因此，高质量的对可能会选择巢址，而不管他们的殖民地内的位置。在均匀生境中繁殖和均匀分布模式被确定为可能的祖先状态，在鹳形目，但有一个显着的过渡率，从均匀分布到中央边缘分布占据均匀生境的物种。
It has long been suggested that habitat structure affects how colonial birds are distributed within their nesting aggregations, but this hypothesis has never been formally tested. The aim of this study was to test for a correlated evolution between habitat heterogeneity and within-colony distributions of Ciconiiformes by using Pagel’s general method of comparative analysis for discrete variables. The analysis indicated that central-periphery gradients of distribution (high-quality individuals occupying central nesting locations) prevail in species breeding in homogeneous habitats. These were mainly ground-nesting larids and spheniscids, where clear central-periphery patterns were recorded in ca. 80 % of the taxa. Since homogeneous habitats provide little variation in the physical quality of nest sites, central nesting locations should be largely preferred because they give better protection against predators by means of more efficient predator detection and deterrence. By contrast, central-periphery gradients tended to be disrupted in heterogeneous habitats, where 75 % of colonial Ciconiiform species showed uniform patterns of distribution. Under this model of distribution, edge nest sites of high physical quality confer higher fitness benefits in comparison to low-quality central sites, and thus, high-quality pairs are likely to choose nest sites irrespectively of their within-colony location. Breeding in homogeneous habitats and uniform distribution patterns were identified as probable ancestral states in Ciconiiformes, but there was a significant transition rate from uniform to central-periphery distributions in species occupying homogeneous habitats.