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首页> 外文期刊>Ecology letters >Invading populations of an ornamental shrub show rapid life history evolution despite genetic bottlenecks
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Invading populations of an ornamental shrub show rapid life history evolution despite genetic bottlenecks

机译:尽管存在遗传瓶颈,但入侵灌木的种群显示出快速的生活史演变

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摘要

Human-mediated species introductions offer opportunities to investigate when and how non-native species to adapt to novel environments, and whether evolution has the potential to contribute to colonization success. Many long-established introductions harbour high genetic diversity, raising the possibility that multiple introductions of genetic material catalyze adaptation and/or the evolution of invasiveness. Studies of nascent invasions are rare but crucial for understanding whether genetic diversity facilitates population expansion. We explore variation and evolution in founder populations of the invasive shrub Hypericum canariense. We find that these introductions have experienced large reductions in genetic diversity, but that increased growth and a latitudinal cline in flowering phenology have nevertheless evolved. These life history changes are consistent with predictions for invasive plants. Our results highlight the potential for even genetically depauperate founding populations to adapt and evolve invasive patters of spread.
机译:人为介导的物种介绍为调查何时以及如何使非本地物种适应新环境提供了机会,以及进化是否有可能为成功定居做出贡献。许多历史悠久的引种具有很高的遗传多样性,增加了遗传材料多次引种催化适应性和/或侵袭性演变的可能性。关于新生入侵的研究很少,但对于了解遗传多样性是否有助于人口扩张至关重要。我们探索入侵灌木金丝桃金丝桃的创始种群的变异和进化。我们发现这些引种经历了遗传多样性的大幅度减少,但是增长的增长和开花物候方面的纬度呈线性变化。这些生活史的变化与对入侵植物的预测一致。我们的研究结果突出表明,即使遗传上绝育的创始种群也有可能适应和发展传播的入侵模式。

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