Invasive aquatic plants perform better in niches more similar to their parents

When arriving in novel environments, propagules experience new conditions that can affect their fitness. Gillard et al. grew plants of an invasive macrophyte, Ludwigia peploides subsp. montevidensis, from seeds sourced from three climatic regions in a common garden experiment. Populations from geographically distant and climatically distinct regions had the most distinct fitness responses. Populations from the third source region, geographically closer to one region but climatically closer to the other, exhibited intermediate responses. Indeed, population sites belonging to the same climate type did not systematically have more similar environmental niches. The more similar the environment in the source region is to the newly invaded region, the better invasive macrophytes grown from seeds perform under these new conditions.

Gillard, M. B., et al. 2020. Seed source regions drive fitness differences in invasive macrophytes. American Journal of Botany https://doi.org/10.1002/ajb2.1475

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入侵性水生植物在生态位上的表现更好，更类似于其父母

当到达新奇的环境时，繁殖者会经历可能影响其健康状况的新条件。吉拉德等。入侵性植物Ludwigia peploides亚种的植物 。 蒙特维登斯，是在一个普通的花园实验中，从三个气候区获得的种子。地理上和气候上不同的地区的人口具有最明显的适应性反应。来自第三源地区的人口，在地理上更靠近一个地区，但在气候上更靠近另一个地区，表现出中等反应。实际上，属于同一气候类型的人口场所没有系统地具有更多类似的环境生态位。源区域中的环境与新近入侵的区域越相似，在这些新条件下，从种子中生长出来的入侵性大型植物表现得越好。

Gillard，MB等。2020年。种子源区域驱动入侵性大型植物的适应性差异。美国植物学杂志https://doi.org/10.1002/ajb2.1475