Geographical variation in predictors of mammalian extinction risk: big is bad, but only in the tropics
Geographical variation in predictors of mammalian extinction risk: big is bad, but only in the tropics
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DOI：
10.1111/j.1461-0248.2009.01307.x
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发表时间：
2009-06-01
期刊：
影响因子：
8.8
通讯作者：
Purvis, Andy
中科院分区：
文献类型：
--
作者：
Fritz, Susanne A.;Bininda-Emonds, Olaf R. P.;Purvis, Andy
虽然以前的研究已经在全球或区域范围内调查了灭绝风险的相关性，但我们的研究明确模拟了地球仪上人为威胁和生物特征的区域影响。使用系统发育比较方法与一个新更新的超树5020现存的哺乳动物，我们调查物种特征的灭绝风险在每个世界自然基金会生态区的影响。我们的分析揭示了特征对风险影响的强烈地理差异：值得注意的是，较大的物种仅在热带地区风险较高。然后，我们将这些模式与当前和最近的历史人类影响的生态区使用空间建模。身体质量的结果显然反映了大规模的土地转换，由于热带以外的大型物种的历史下降。在目前人类活动频繁的地区，分布范围狭窄的稀有物种往往面临高风险。我们描述的生物特征和人为威胁之间的相互作用增加了对决定灭绝风险的过程的理解。
Whereas previous studies have investigated correlates of extinction risk either at global or regional scales, our study explicitly models regional effects of anthropogenic threats and biological traits across the globe. Using phylogenetic comparative methods with a newly-updated supertree of 5020 extant mammals, we investigate the impact of species traits on extinction risk within each WWF ecoregion. Our analyses reveal strong geographical variation in the influence of traits on risk: notably, larger species are at higher risk only in tropical regions. We then relate these patterns to current and recent-historical human impacts across ecoregions using spatial modelling. The body-mass results apparently reflect historical declines of large species outside the tropics due to large-scale land conversion. Narrow-ranged and rare species tend to be at high risk in areas of high current human impacts. The interactions we describe between biological traits and anthropogenic threats increase understanding of the processes determining extinction risk.