Competition-colonization dynamics in experimental bacterial metacommunities
Competition-colonization dynamics in experimental bacterial metacommunities
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DOI：
10.1038/ncomms2239
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发表时间：
2012-12-01
影响因子：
16.6
通讯作者：
Mouquet, Nicolas
中科院分区：
文献类型：
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作者：
Livingston, George;Matias, Miguel;Mouquet, Nicolas
用来解释物种共存的最简单的假设之一是竞争-殖民权衡，即如果物种在竞争和殖民能力之间表现出权衡，则它们可以稳定地共存于景观中。尽管有广泛的理论，但预测竞争-殖民权衡的动态结果在很大程度上未经检验。景观变化，如栖息地的破坏，被认为是在竞争殖民动态下的共存有很大的影响，虽然没有正式的测试这一预测。在这里，我们提出了竞争殖民动力学的第一个例子，完全转置理论到两个假单胞菌菌株的控制实验metacquitity。竞争殖民动态实现了直接操纵权衡强度和殖民率，以产生全方位的共存条件和栖息地破坏的反应。我们的研究成功地产生了与理论预测相匹配的竞争-殖民动态，我们的研究结果进一步揭示了当扩展到整个亚热带地区时，多样性与生产力之间的负相关关系。
One of the simplest hypotheses used to explain species coexistence is the competition-colonization trade-off, that is, species can stably coexist in a landscape if they show a trade-off between competitive and colonization abilities. Despite extensive theory, the dynamics predicted to result from competition-colonization trade-offs are largely untested. Landscape change, such as habitat destruction, is thought to greatly influence coexistence under competition-colonization dynamics, although there is no formal test of this prediction. Here we present the first illustration of competition-colonization dynamics that fully transposes theory into a controlled experimental metacommunity of two Pseudomonas bacterial strains. The competition-colonization dynamics were achieved by directly manipulating trade-off strength and colonization rates to generate the full range of coexistence conditions and responses to habitat destruction. Our study successfully generates competition-colonization dynamics matching theoretical predictions, and our results further reveal a negative relationship between diversity and productivity when scaling up to entire metacommunities.