Global hotspots and correlates of alien species richness across taxonomic groups
Global hotspots and correlates of alien species richness across taxonomic groups
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DOI：
10.1038/s41559-017-0186
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发表时间：
2017-07-01
影响因子：
16.8
通讯作者：
Essl, Franz
中科院分区：
文献类型：
--
作者：
Dawson, Wayne;Moser, Dietmar;Essl, Franz
人为媒介的跨越生物地理障碍的运输导致了外来物种在世界各地新区域的引进和建立。然而，我们缺乏多个分类群已建立的外来物种丰富度的全球图景。在这里，我们评估了186个岛屿和423个大陆地区的八个分类类别(两栖动物、蚂蚁、鸟类、淡水鱼、哺乳动物、维管植物、爬行动物和蜘蛛)的全球格局和已建立的外来物种丰富度的潜在驱动因素。已建立的外来物种丰富的热点主要是岛屿和沿海大陆地区。人均国内生产总值、人口密度和面积越大的地区，外星人财富就越高，其中岛屿的影响最大。蚂蚁和爬行动物、鸟类和哺乳动物、维管束植物和蜘蛛形成了一对分类群，在已建立的外来丰富度上具有最高的空间一致性，但解释丰富度的驱动因素在每对分类群之间存在差异。在所有分类组别中，我们的结果突出了需要优先防止外来物种进一步引入全球岛屿和沿海大陆地区。
Human-mediated transport beyond biogeographic barriers has led to the introduction and establishment of alien species in new regions worldwide. However, we lack a global picture of established alien species richness for multiple taxonomic groups. Here, we assess global patterns and potential drivers of established alien species richness across eight taxonomic groups (amphibians, ants, birds, freshwater fishes, mammals, vascular plants, reptiles and spiders) for 186 islands and 423 mainland regions. Hotspots of established alien species richness are predominantly island and coastal mainland regions. Regions with greater gross domestic product per capita, human population density, and area have higher established alien richness, with strongest effects emerging for islands. Ants and reptiles, birds and mammals, and vascular plants and spiders form pairs of taxonomic groups with the highest spatial congruence in established alien richness, but drivers explaining richness differ between the taxa in each pair. Across all taxonomic groups, our results highlight the need to prioritize prevention of further alien species introductions to island and coastal mainland regions globally.