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Global diversity patterns in sandy beach macrofauna: a biogeographic analysis

机译：沙滩大型动物群落的全球多样性格局：生物地理学分析

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Unlike the advances generated on land, the knowledge of global diversity patterns in marine ecosystems is limited to a small number of studies. For sandy beaches, which dominate the world’s ocean shores, previous meta-analyses highlighted the role of beach morphodynamics in explaining species richness patterns. Oceanographic variables and historical processes have not been considered, even though they could be main predictors of community structure. Our work, based on 256 sandy beaches around the world, analysed species richness considering for the first time temperature, salinity and primary productivity. Biogeographic units (realms, provinces and ecoregions) were used to incorporate historical factors in modelling processes. Ecoregions, which implicitly include isolation and coastal complexity among other historical geographic factors, best represented trends in species richness worldwide. Temperature was a main predictor of species richness, which increased from temperate to tropical sandy beaches. Species richness increased with tide range and towards wide beaches with gentle slopes and fine grains, which is consistent with the hypothesis that habitat availability has an important role in structuring sandy beach communities. The role of temperature and habitat availability suggests that ocean warming and sea level rise could affect the distribution of obligate species living in these narrow ecosystems.
机译：与陆地上取得的进展不同，海洋生态系统中全球多样性格局的知识仅限于少数研究。对于主导世界海洋沿岸的沙滩，以前的荟萃分析强调了沙滩形态动力学在解释物种丰富度模式中的作用。尽管海洋变量和历史过程可能是群落结构的主要预测指标，但并未考虑这些变量。我们的工作基于全球256个沙滩，在首次考虑温度，盐度和初级生产力的情况下分析了物种丰富度。生物地理单位（领域，省和生态区域）被用来在建模过程中纳入历史因素。在其他历史地理因素中隐含地包括隔离和沿海复杂性的生态区最能代表全球物种丰富度的趋势。温度是物种丰富度的主要预测指标，物种丰富度从温带到热带沙滩增加。物种丰富度随着潮汐范围的增加而增加，并向宽阔的海滩倾斜且具有细小颗粒，这与以下假设相一致：栖息地的可用性在构造沙滩社区中起着重要作用。温度和栖息地可用性的作用表明，海洋变暖和海平面上升可能会影响生活在这些狭窄生态系统中的专性物种的分布。

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