Identifying the factors that determine the severity and type of alien bird impacts
Identifying the factors that determine the severity and type of alien bird impacts
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DOI：
10.1111/ddi.12721
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发表时间：
2018-06-01
影响因子：
4.6
通讯作者：
Blackburn, Tim M.
中科院分区：
文献类型：
--
作者：
Evans, Thomas;Kumschick, Sabrina;Blackburn, Tim M.
目的：确定外来鸟类对环境影响的严重程度和类型的相关特征，以提高我们预测哪些物种可能具有最具破坏性的影响的能力。地点:全球。方法：对113种鸟类的影响程度和类型的性状进行整理。使用混合效应模型对这些数据进行了分析，该模型考虑了物种的系统发育非独立性。结果：外来鸟类对生态环境的影响程度和影响类型在性状上不是随机分布的。外来物种范围大小和生境宽度与影响严重程度密切相关。捕食影响与饮食偏好密切相关，但也与外来生物的范围大小、相对脑大小和停留时间有关。与其他外来物种相互作用介导的影响与外来物种的范围大小和饮食宽度有关。主要结论：广泛分布的广泛性外来鸟类对环境的影响最为严重。这可能是因为这些物种的数量和无处不在更有可能造成环境影响，但这也可能是因为它们更有可能被发现和研究。我们的研究发现，几乎没有证据表明人均影响对影响严重程度的影响。
Aim: To identify traits related to the severity and type of environmental impacts generated by alien bird species, in order to improve our ability to predict which species may have the most damaging impacts.Location: Global.Methods: Information on traits hypothesized to influence the severity and type of alien bird impacts was collated for 113 bird species. These data were analysed using mixed effects models accounting for phylogenetic non-independence of species.Results: The severity and type of impacts generated by alien bird species are not randomly distributed with respect to their traits. Alien range size and habitat breadth were strongly associated with impact severity. Predation impacts were strongly associated with dietary preference, but also with alien range size, relative brain size and residence time. Impacts mediated by interactions with other alien species were related to alien range size and diet breadth.Main conclusions: Widely distributed generalist alien birds have the most severe environmental impacts. This may be because these species have greater opportunity to cause environmental impacts through their sheer number and ubiquity, but this could also be because they are more likely to be identified and studied. Our study found little evidence for an effect of per capita impact on impact severity.