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首页> 外文期刊>Freshwater science >Macroscale drivers influencing the structural and functional organization of stream macroinvertebrate metacommunities: potential role of hydrological connectivity
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Macroscale drivers influencing the structural and functional organization of stream macroinvertebrate metacommunities: potential role of hydrological connectivity

机译：Macroscale驱动程序影响流溪流型MacroinverteCality的结构和功能组织：水文连接的潜在作用

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摘要

We assessed the potential influence of hydrological connectivity among subdrainages on the structural and functional organization of stream macroinvertebrate metacommunities in 2 adjacent, large Asian watersheds (~1.4 million km~(2)). To examine the structural organization of metacommunities, we used multisite β-diversity partitioning and applied the Elements of Metacommunity Structure (EMS) framework to resolve aspects of taxon associations and metacommunity assembly. We also decomposed functional β diversity into nestedness and turnover to assess functional organization of metacommunities among watersheds of contrasting connectivity. To describe changes in functional composition, we used a multidimensional functional trait analysis to calculate the 3 primary components of functional diversity. The nestedness component of β diversity had a higher contribution in the watershed displaying isolated subdrainages, and apparent lack of hydrological connectivity had a significant effect on the ecological fitting of macroinvertebrate metacommunities, generating a discrete composition of communities. Partitioning of functional β diversity suggested no difference among watersheds in metacommunity functional organization and a high level of functional redundancy among communities of subdrainages independent of hydrological isolation. These results show that hydrological connectivity is potentially an important driver structuring stream macroinvertebrate metacommunities at a macroecological scale. Patterns of metacommunity structure were expressed better using taxonomic than functional-trait diversity. In spite of a perceived functional redundancy, a wider functional space was observed in the absence of hydrological connectivity, a result suggesting discrete but partially overlapping functional entities associated with hydrological isolation in these watersheds.
机译：我们评估了副兴奋剂在2个邻近的大型亚洲流域（〜140万公里〜（2））中的结构和功能组织的水文连通性潜在影响。为了审查MetaComencities的结构组织，我们使用多路径β-多样性分区，并应用了MetAcomencity结构（EMS）框架的要素来解决分类群体协会和MetaComencity大会的方面。我们还将功能性β多样性分解为嵌套和营业额，以评估流域之间的据对比连通性的机构的功能组织。为了描述功能组合物的变化，我们使用了多维功能性特性分析来计算功能多样性的3个主要分量。 β多样性的嵌套组分在流域展出孤立的子项中具有更高的贡献，并且表观缺乏水文连通性对大型近似术地区的生态拟合具有显着影响，产生了分立的社区组成。功能性β多样性的分区表明流域在MetaComencity功能组织中没有区别，以及与水文隔离无关的子女群社区的高水平功能冗余。这些结果表明，水文连通性可能是一种重要的驾驶员结构化宏观学级的大型蠕动地区。使用分类学比功能性状多样性更好地表达了MetacomMunity结构的模式。尽管有一种功能冗余，但在没有水文连接的情况下观察到更广泛的功能空间，结果表明与这些流域中的水文隔离相关的离散但部分重叠的功能实体。

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  • 来源
    《Freshwater science》 |2018年第1期|共10页
  • 作者

    Alain Maasri; Barbara Hayford; Bolortsetseg Erdenee; Jon Gelhaus;

  • 作者单位

    Department of Biodiversity Earth and Environmental Science The Academy of Natural Sciences of Drexel University 1900 Ben Franklin Parkway Philadelphia Pennsylvania 19103 USA;

    Department of Life Sciences Wayne State College 1111 Main Street Wayne Nebraska 68787 USA;

    Department of Biodiversity Earth and Environmental Science The Academy of Natural Sciences of Drexel University 1900 Ben Franklin Parkway Philadelphia Pennsylvania 19103 USA;

    Department of Biodiversity Earth and Environmental Science The Academy of Natural Sciences of Drexel University 1900 Ben Franklin Parkway Philadelphia Pennsylvania 19103 USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 水生生物学;
  • 关键词

    metacommunity structure; functional diversity; functional redundancy; turnover; nestedness; EMS; Mongolia;

    机译：MetaComenity结构;功能多样性;功能冗余;营业额;嵌套;EMS;蒙古;

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