Mortality causes universal changes in microbial community composition
Mortality causes universal changes in microbial community composition
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DOI：
10.1038/s41467-019-09925-0
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发表时间：
2019-05-09
影响因子：
16.6
通讯作者：
Gore, Jeff
中科院分区：
文献类型：
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作者：
Abreu, Clare I.;Friedman, Jonathan;Gore, Jeff
所有生物都对非生物环境敏感，环境恶化可能导致灭绝。然而，在多物种群落中的生存取决于相互作用，一些物种甚至可能受到恶劣环境的青睐，从而损害其他物种，导致环境恶化时可能出现令人惊讶的群落转变。在这里，我们结合联合收割机理论和实验室微观世界来预测简单的微生物群落将如何改变下增加死亡率，控制不同的稀释。我们发现，在两种共培养，死亡率增加有利于更快的生长，证实了理论预测。此外，如果生长较慢的植物在低死亡率下占主导地位，那么随着死亡率的增加，结果可能会逆转。我们发现，这种增长和竞争能力之间的权衡是普遍存在的低稀释，导致结果急剧变化，稀释增加，这些两个物种的转变传播到简单的多物种社区。我们的研究结果认为，自下而上的方法可以提供洞察社区如何在压力下变化。
All organisms are sensitive to the abiotic environment, and a deteriorating environment can cause extinction. However, survival in a multispecies community depends upon interactions, and some species may even be favored by a harsh environment that impairs others, leading to potentially surprising community transitions as environments deteriorate. Here we combine theory and laboratory microcosms to predict how simple microbial communities will change under added mortality, controlled by varying dilution. We find that in a two-species coculture, increasing mortality favors the faster grower, confirming a theoretical prediction. Furthermore, if the slower grower dominates under low mortality, the outcome can reverse as mortality increases. We find that this tradeoff between growth and competitive ability is prevalent at low dilution, causing outcomes to shift dramatically as dilution increases, and that these two-species shifts propagate to simple multispecies communities. Our results argue that a bottom-up approach can provide insight into how communities change under stress.