Environmental and geometric constraints on Indo-Pacific coral reef biodiversity
Environmental and geometric constraints on Indo-Pacific coral reef biodiversity
复制标题
DOI：
10.1111/j.1461-0248.2005.00763.x
复制
发表时间：
2005-06-01
期刊：
影响因子：
8.8
通讯作者：
Tanner, J
中科院分区：
文献类型：
--
作者：
Bellwood, DR;Hughes, TP;Tanner, J
印度-澳大利亚群岛是世界上最丰富的珊瑚礁生物多样性热点。传统的假设，占这种特殊的生物多样性，突出了环境变量的重要性，如栖息地面积和能源投入。然而，最近，一个额外的解释已经提出了基于几何约束的地理范围内的一个有界的域，这会导致一个中间域的物种丰富度的峰值，中间域效应（MDE）的位置。在这里，我们第一次研究面积，能源和MDE共同对物种丰富度模式的相对重要性。模型选择表明，最好的模型结合了MDE和珊瑚礁面积，但没有能源的影响，而且，这个最适合的模型捕捉到所有的主要功能的珊瑚礁鱼类和珊瑚物种丰富度模式。生境面积是影响物种丰富度的主要环境因子。防止生境进一步破碎和丧失，对保护珊瑚礁生物多样性至关重要。
The Indo-Australian Archipelago supports the world's richest coral reef biodiversity hotspot. Traditional hypotheses that account for such exceptional biodiversity have highlighted the importance of environmental variables such as habitat area and energy input. Recently, however, an additional explanation has been proposed based on geometric constraints in the placement of geographical ranges within a bounded domain, which cause a mid-domain peak in species richness; the mid-domain effect (MDE). Here, for the first time, we examine the relative importance of area, energy and MDE jointly on species richness patterns. Model selection indicates that the best model incorporates MDE and reef area, but no energy effect; moreover, this best-fit model captures all major features of reef fish and coral species richness patterns. Habitat area is the major environmental factor influencing species richness. The prevention of further fragmentation and loss of habitat area is of critical importance for the conservation of coral reef biodiversity.