The worldwide impact of urbanisation on avian functional diversity.

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ID: 105396
2020
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Abstract
Urbanisation is driving rapid declines in species richness and abundance worldwide, but the general implications for ecosystem function and services remain poorly understood. Here, we integrate global data on bird communities with comprehensive information on traits associated with ecological processes to show that assemblages in highly urbanised environments have substantially different functional composition and 20% less functional diversity on average than surrounding natural habitats. These changes occur without significant decreases in functional dissimilarity between species; instead, they are caused by a decrease in species richness and abundance evenness, leading to declines in functional redundancy. The reconfiguration and decline of native functional diversity in cities are not compensated by the presence of exotic species but are less severe under moderate levels of urbanisation. Thus, urbanisation has substantial negative impacts on functional diversity, potentially resulting in impaired provision of ecosystem services, but these impacts can be reduced by less intensive urbanisation practices.
全球范围内，城市化正在导致物种丰富度和丰度的急剧下降，但其对生态系统功能与服务的普遍影响仍知之甚少。在此，我们整合了全球鸟类群落数据以及与生态过程相关的全面性状信息，结果表明，高度城市化环境中的群落相较于周边自然生境具有显著不同的功能组成，且功能多样性平均降低了20%。这些变化的发生并未伴随物种间功能相异性的显著下降；相反，它们是由物种丰富度和丰度均匀度的降低所致，进而导致了功能冗余的下降。城市中本土功能多样性的重构与下降并未因外来物种的存在而得到补偿，但在中度城市化水平下其严重程度相对较低。因此，城市化对功能多样性具有显著的负面影响，可能导致生态系统服务供给受损，但采用较低强度的城市化模式可以减轻这些影响。
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sol2020theecology Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Sol, Daniel;Trisos, Christopher;Múrria, Cesc;Jeliazkov, Alienor;González-Lagos, Cesar;Pigot, Alex L;Ricotta, Carlo;Swan, Christopher M;Tobias, Joseph A;Pavoine, Sandrine;
Journal Ecology letters
Year 2020
DOI
10.1111/ele.13495
URL
Keywords
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