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Coral communities are regionally enriched along an oceanic biodiversity gradient

机译:珊瑚群落沿海洋生物多样性梯度富集了区域

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摘要

Ecological communities are influenced by processes operating at multiple scales(1-5). Thus, a better understanding of how broad- as well as local-scale processes affect species diversity and richness is increasingly becoming a central focus in modern community ecology(6-9). Here, in a study of unprecedented geographical scope, we show significant regional and local variation in the species richness of coral assemblages across an oceanic biodiversity gradient. The gradient that we sampled extends 10,000 km eastwards from the world's richest coral biodiversity hotspot in the central Indo-Pacific(10). Local richness and the size of regional species pools decline significantly across 15 islands spanning the gradient. In addition, richness declines across three adjacent habitats ( reef slopes, crests and flats). In each habitat, a highly consistent linear relationship between local and regional species richness indicates strong regional enrichment. Thus, even on the most diverse coral reefs in the world, local coral assemblages are profoundly affected by regional-scale processes. Understanding these historical and biogeographical influences is essential for the effective management and preservation of these endangered communities.
机译:生态群落受到多种规模过程的影响(1-5)。因此,对广泛的以及局部的过程如何影响物种多样性和丰富性的更好的理解正日益成为现代社区生态学的中心焦点(6-9)。在此,在一项史无前例的地理范围研究中,我们显示了整个海洋生物多样性梯度中珊瑚群落物种丰富度的显着区域和局部差异。我们从印度太平洋中部世界上最丰富的珊瑚生物多样性热点向东延伸10,000公里(10)。在整个梯度上的15个岛屿上,当地的丰富度和区域物种库的大小显着下降。此外,在三个相邻生境(礁石坡度,波峰和公寓)的富裕度下降。在每个栖息地中,本地和区域物种丰富度之间高度一致的线性关系表明区域丰富。因此,即使在世界上最多样化的珊瑚礁上,当地的珊瑚群也受到区域规模过程的深刻影响。了解这些历史和生物地理影响对于有效管理和保护这些濒危社区至关重要。

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