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首页> 外文期刊>Marine ecology progress series >Disentangling the effects of propagule supply and environmental filtering on the spatial structure of a rocky shore metacommunity
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Disentangling the effects of propagule supply and environmental filtering on the spatial structure of a rocky shore metacommunity

机译：解开传播繁殖和环境过滤对石质海岸群落的空间结构的影响

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ABSTRACT: Environment-driven variation in the supply of individuals to local assemblages can determine patterns of community structure. Alternatively, local environmental conditions can determine the type of species that can be successfully established in a given community. Most communities are probably found somewhere between these 2 extremes, but few studies have attempted to disentangle their effects in a community-wide context. Using multivariate approaches in rocky shore communities, we showed that environmental variables (i.e. sea surface temperature and wind stress), the benthic abundance of 108 species of invertebrates and macroalgae, and recruitment rates of invertebrates all shared significant spatial and temporal patterns of variability across a 400 km shoreline marked by the presence of a prominent upwelling centre. Variance-partition analyses for the invertebrates with pelagic development showed that spatially structured environmental filtering alone explained only 7% of the variation in community structure. In contrast, the combination of environmental conditions and recruitment variation explained 45% of the variability in community structure and an additional 18% was jointly explained by recruitment and spatial relationships among sampling sites. Unexplained variation (41%) can be attributed to factors like local species interactions that are robust to environmental variability. Therefore, environment-driven variation in recruitment rates can have, in comparison to pure environmental filtering, stronger effects on the structure of this metacommunity. Our results can serve as a foundation for predictive models of the response of biodiversity to climate change and other human-induced disturbances, which are predicted to alter local environmental conditions and dispersal pathways.
机译：摘要：环境驱动的个人向当地集合体供应的变化可以确定社区结构的模式。或者，当地环境条件可以确定可以在给定社区中成功建立的物种类型。大多数社区可能位于这两个极端之间，但是很少有研究试图在整个社区范围内消除其影响。使用多岩石海岸社区的多元方法，我们发现环境变量（即海面温度和风应力），108种无脊椎动物和大型藻类的底栖生物丰度以及无脊椎动物的募集率在一个区域内都具有明显的时空变异性。 400公里的海岸线，以突出的上升流中心为标志。对中上层发育无脊椎动物的方差-分区分析表明，仅空间结构化环境过滤仅能解释群落结构变化的7％。相比之下，环境条件和募集变异的结合解释了45％的群落结构变异性，另外18％则是由采样地点之间的募集和空间关系共同解释的。无法解释的变异（41％）可以归因于对环境变异具有鲁棒性的局部物种相互作用等因素。因此，与纯环境过滤相比，环境驱动的招聘率差异可能对该元社区的结构产生更大的影响。我们的结果可以作为生物多样性对气候变化和其他人为干扰的响应预测模型的基础，这些预测被认为会改变当地的环境条件和传播途径。

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