Are threat status and invasion success two sides of the same coin
Are threat status and invasion success two sides of the same coin
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威胁状态和入侵成功是同一枚硬币的两个面
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
D. Strayer
中科院分区：
文献类型：
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作者：
J. Jeschke;D. Strayer
全球变化增加了受威胁物种的数量和入侵者的影响。这两个问题有时被认为是同一枚硬币的两面，入侵物种具有濒危物种的相反特征。然而，这一假设的有效性从未得到过检验。我们分析了所有欧洲和北美淡水鱼和鸟类的20种生活史和其他特征。对于这1813个物种，我们比较了入侵成功和IUCN威胁状态的决定因素，发现有利于入侵的特征不仅仅是有利于濒危的相反。物种的大小和生活史与威胁状态的相关性比入侵性更强。另一方面，与人类的联系是入侵性的最佳预测因素，但与威胁状态无关。因此，入侵者的增加是由全球变化的不同方面引起的，而不是濒危物种的威胁。
Global change increases both the number of threatened species and the impacts of invasives. These two problems are sometimes assumed to be opposite sides of the same coin, with invasive species having the opposite characteristics of endangered species. However, the validity of this assumption has never been tested. We analysed 20 life-history and other traits of all European and North American freshwater fish and birds. For these 1813 species, we compared the determinants of invasion success and IUCN-threat status and found that traits favouring invasion are not simply the opposite of those that favour endangerment. The size and life history of species are correlated more strongly with threat status than invasiveness. On the other hand, association with humans is the best predictor of invasiveness but is not correlated with threat status. Thus, the rise of invaders is caused by different aspects of global change than the imperilment of endangered species.