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首页> 外文期刊>Ecology letters >Loss of functional diversity under land use intensification across multiple taxa
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Loss of functional diversity under land use intensification across multiple taxa

机译:跨多个分类群的土地利用集约化下的功能多样性丧失

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摘要

Land use intensification can greatly reduce species richness and ecosystem functioning. However, species richness determines ecosystem functioning through the diversity and values of traits of species present. Here, we analyze changes in species richness and functional diversity (FD) at varying agricultural land use intensity levels. We test hypotheses of FD responses to land use intensification in plant, bird, and mammal communities using trait data compiled for 1600+ species. To isolate changes in FD from changes in species richness we compare the FD of communities to the null expectations of FD values. In over one-quarter of the bird and mammal communities impacted by agriculture, declines in FD were steeper than predicted by species number. In plant communities, changes in FD were indistinguishable from changes in species richness. Land use intensification can reduce the functional diversity of animal communities beyond changes in species richness alone, potentially imperiling provisioning of ecosystem services.
机译:土地利用集约化可以大大减少物种丰富度和生态系统功能。但是,物种丰富度通过存在的物种特征的多样性和价值来决定生态系统的功能。在这里,我们分析了不同农业土地利用强度水平下物种丰富度和功能多样性(FD)的变化。我们使用针对1600多个物种编制的特征数据,测试FD对植物,鸟类和哺乳动物群落中土地利用集约化响应的假设。为了将FD的变化与物种丰富度的变化隔离开来,我们将群落的FD与FD值的零期望相比较。在四分之一以上受农业影响的鸟类和哺乳动物群落中,FD的下降幅度超过了按物种数量预测的幅度。在植物群落中,FD的变化与物种丰富度的变化是无法区分的。土地利用集约化不仅可以改变物种丰富度,还可以减少动物群落的功能多样性,从而有可能阻碍生态系统服务的提供。

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