Coexistence via coevolution driven by reduced allelochemical effects and increased tolerance to competition between invasive and native plants
Coexistence via coevolution driven by reduced allelochemical effects and increased tolerance to competition between invasive and native plants
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DOI：
10.1111/nph.14937
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发表时间：
2018-04-01
期刊：
影响因子：
9.4
通讯作者：
Peng, Shaolin
中科院分区：
文献类型：
--
作者：
Huang, Fangfang;Lankau, Richard;Peng, Shaolin
如果选择能减少竞争者之间的适应度不平等和/或加强每个种群内的负频率依赖，协同进化可以促进两个竞争物种的长期共存。然而，工厂竞争对手之间明确的共同进化很少有文献记载。植物入侵提供了捕捉共同进化过程的机会。在这里，我们通过在入侵历史的时间序列上测试不同共存长度的种群之间的竞争效应，研究了入侵杂草葱叶柄和本地竞争对手Pilea puila之间的发展关系如何影响它们的长期共存。它们的共存更多地是由于相对于均衡进程的稳定化进程的增加而促进的。这些变化可能部分源于入侵者化感作用特征的减少和原生植物耐受性的进化。这些结果表明，一些本土物种能够进化出对强大入侵者竞争效应的耐受性，这可能促进了它们在入侵群落中的持久性。然而，协同进化拯救相互竞争的种群的潜力可能因本地物种而异，不应指望进化过程来补偿外来入侵的生态后果。
Coevolution can promote long-term coexistence of two competing species if selection acts to reduce the fitness inequality between competitors and/or strengthen negative frequency dependence within each population. However, clear coevolution between plant competitors has been rarely documented. Plant invasions offer opportunities to capture the process of coevolution. Here we investigated how the developing relationship between an invasive forb, Alliaria petiolata, and a native competitor, Pilea pumila, may affect their long-term coexistence, by testing the competitive effects of populations of varying lengths of co-occurrence on each other across a chronosequence of invasion history.Alliaria petiolata and P.pumila tended to develop greater tolerance to competition over invasion history. Their coexistence was promoted more by increases in stabilizing relative to equalizing processes. These changes likely stem in part from reductions in allelopathic traits in the invader and evolution of tolerance in the native. These results suggested that some native species can evolve tolerance against the competitive effects of strong invaders, which likely promoted their persistence in invaded communities. However, the potential for coevolutionary rescue of competing populations is likely to vary across native species, and evolutionary processes should not be expected to compensate for the ecological consequences of exotic invasions.