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首页> 外文期刊>Conservation Biology >Establishment success across convergent Mediterranean ecosystems: an analysis of bird introductions
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Establishment success across convergent Mediterranean ecosystems: an analysis of bird introductions

机译：在融合的地中海生态系统中建立成功：对鸟类引进的分析

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Concern over the impact of invaders on biodiversity and on the functioning of ecosystems has generated a rising tide of comparative analyses aiming to unveil the factors that shape the success of introduced species across different regions. One limitation of these studies is that they often compare geographically rather than ecologically defined regions We propose an approach that can help address this limitation: comparison of invasions across convergent ecosystems that share similar climates. We compared avian invasions in five convergent mediterranean climate systems around,the globe. Based on a database of 180 introductions representing 121 avian species, we found that the proportion of bird species successfully established was high in all mediterranean systems (more than 40% for all five regions). Species differed in their likelihood to become established, although success was not higher for those originating from mediterranean systems than for those from nonmediterranean regions. Controlling for this taxonomic effect with generalized linear mixed models, species introduced into mediterranean islands did not show higher establishment success than those introduced to the mainland. Susceptibility to avian invaders, however, differed substantially among the different mediterranean regions. The probability that a species will become established was highest in the Mediterranean Basin and lowest in mediterranean Australia and the South African Cape. Our results suggest that many of the birds recently introduced into mediterranean systems, and especially into the Mediterranean Basin, have a high potential to establish self-sustaining populations. This finding has important implications for conservation in these biologically diverse hotspots.
机译：对入侵者对生物多样性和生态系统功能的影响的关注引起了比较分析的上升趋势，旨在揭示影响不同地区引进物种成功的因素。这些研究的局限性在于它们通常会比较地理区域而不是生态定义的区域。我们提出了一种有助于解决这一局限性的方法：比较具有相似气候的融合生态系统的入侵。我们比较了全球五个趋同的地中海气候系统中鸟类的入侵情况。基于代表121种鸟类的180种引种的数据库，我们发现成功建立的鸟类物种在所有地中海系统中所占的比例都很高（在所有五个地区中，这一比例都超过40％）。物种建立的可能性不同，尽管源自地中海系统的物种的成功率不高于来自非地中海区域的物种。用广义线性混合模型控制这种分类学效果，引入地中海岛屿的物种没有比引入大陆的物种显示更高的建立成功率。然而，在不同的地中海地区，禽类入侵者的易感性差异很大。在地中海盆地，一个物种成为定居物种的可能性最高，在地中海澳大利亚和南非开普省，这一可能性最低。我们的结果表明，最近引入地中海系统，尤其是引入地中海盆地的许多鸟类具有建立自我维持种群的巨大潜力。这一发现对这些生物多样性热点地区的保护具有重要意义。

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