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Determinants of different facets of beta diversity in Mediterranean marine amphipods

机译：地中海海洋Amphipods的β多样性不同方面的决定因素

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摘要

Relying on a purely taxonomic view of diversity may ignore the fact that ecological communities can be constituted of species having both distinct evolutionary histories and functional characteristics. Thus, considering how the multiple facets of diversity vary along environmental and geographic gradients may provide insights into the role of historic processes and current environmental conditions in determining the distribution of species, lineages and functions across space. Using distributional, taxonomic-distance and traits information, we explored the role of spatial/environmental gradients and of biogeographic subdivision of Mediterranean Sea on the different facets and components of beta diversity in seagrass amphipods. Beta diversity partitioning and correlation analyses showed a nearly equal contribution of the replacement and richness components on total beta diversity for all facets, although the influence of environmental and geographic distance differed among components. While the replacement was mainly related to a pure spatial gradient, both the environmental and geographic distances were correlated with the richness component of beta diversities. Our results are in line with the complex paleobiogeographic history of the Mediterranean Sea, with the replacement component likely related to the progressive substitution of species of Atlantic origin with Mediterranean endemics along the west-east geographic gradient, and the richness component to the marked environmental difference between different basins. Moreover, the influence of biogeographic partition on the richness components suggests a role of spatially structured gradients at biogeographic level in determining the net loss/gain of species, lineages and functions.
机译：依靠纯粹的分类分类观点可能会忽视生态社区可以构成具有不同进化历史的物种和功能特征的事实。因此，考虑到多样性的多样性沿环境和地理梯度的变化如何，可以提供历史过程和当前环境条件在确定种类，衬里和空间功能的分布方面的角色。利用分布，分类距离和性格特点，我们探讨的空间/环境梯度和海草脚类不同方面和β多样性的组成部分地中海的生物地理分区的作用。 β多样性分区和相关分析显示替代和丰富组件对所有方面的总β多样性的几乎相等的贡献，尽管环境和地理距离的影响不同。虽然更换主要与纯空间梯度相关，但环境和地理距离都与β多样性的丰富性分量相关。我们的结果符合地中海的复杂古代古代地理历史，替代组成部分可能与沿着西部地理梯度沿着地中海的地中海的逐步替代逐步替代地中海园林，以及丰富的成分对标志的环境差异在不同的盆地之间。此外，生物地理分区对富裕组分的影响表明在确定物种，谱系和功能的净损失/增益时，在生物地图水平中的空间结构化梯度作用。

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  • 来源
    《Marine biology》 |2021年第6期|90.1-90.12|共12页
  • 作者

    Bellisario Bruno; Camisa Federica; Abbattista Chiara; Cimmaruta Roberta;

  • 作者单位

    Tuscia Univ Viterbo Largo Univ Snc Blocco C I-01100 Viterbo Italy;

    Tuscia Univ Viterbo Largo Univ Snc Blocco C I-01100 Viterbo Italy;

    Tuscia Univ Viterbo Largo Univ Snc Blocco C I-01100 Viterbo Italy;

    Tuscia Univ Viterbo Largo Univ Snc Blocco C I-01100 Viterbo Italy;

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