Intraspecific Trait Variation Is Correlated with Establishment Success of Alien Mammals
Intraspecific Trait Variation Is Correlated with Establishment Success of Alien Mammals
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DOI：
10.1086/681105
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发表时间：
2015-06-01
影响因子：
2.9
通讯作者：
Jeschke, Jonathan M.
中科院分区：
文献类型：
--
作者：
Gonzalez-Suarez, Manuela;Bacher, Sven;Jeschke, Jonathan M.
许多研究旨在确定成功引入外来物种的共同预测因素，但搜索的成功有限，特别是对动物。过去的研究主要集中在平均性状值，即使遗传和表型变异已被证明在植物和一些动物（主要是无脊椎动物）的建立成功中发挥作用。使用一个全球数据库，描述了511个引进事件，代表97种哺乳动物，我们表明，种内形态特征的变化与建立成功，即使控制繁殖体压力的积极影响。特别是，更大的建立成功与成年人的身体大小的变化，但令人惊讶的是，新生儿的身体大小的变化较小，可能反映不同的权衡和限制，影响人口动态不同。我们发现没有平均性状描述符与建立成功，虽然物种占据更广泛的本地分布范围（可能有更大的生态位）更成功。我们的研究结果强调明确考虑种内变异的重要性，以预测建立成功的动物物种，并普遍了解人口动态。这种认识可能会改善对外来物种的管理，并提高有意释放的成功率，例如，用于生物控制或重新引入。
Many studies have aimed to identify common predictors of successful introductions of alien species, but the search has had limited success, particularly for animals. Past research focused primarily on mean trait values, even though genetic and phenotypic variation has been shown to play a role in establishment success in plants and some animals (mostly invertebrates). Using a global database describing 511 introduction events representing 97 mammalian species, we show that intraspecific variation in morphological traits is associated with establishment success, even when controlling for the positive effect of propagule pressure. In particular, greater establishment success is associated with more variation in adult body size but, surprisingly, less variation in neonate body size, potentially reflecting distinct trade-offs and constraints that influence population dynamics differently. We find no mean trait descriptors associated with establishment success, although species occupying wider native distribution ranges (which likely have larger niches) are more successful. Our results emphasize the importance of explicitly considering intraspecific variation to predict establishment success in animal species and generally to understand population dynamics. This understanding might improve management of alien species and increase the success of intentional releases, for example, for biocontrol or reintroductions.