Context-dependent dynamics lead to the assembly of functionally distinct microbial communities
Context-dependent dynamics lead to the assembly of functionally distinct microbial communities
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DOI：
10.1038/s41467-020-15169-0
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发表时间：
2020-03-18
影响因子：
16.6
通讯作者：
Cordero, Otto X.
中科院分区：
文献类型：
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作者：
Bittleston, Leonora S.;Gralka, Matti;Cordero, Otto X.
通过种间相互作用的生态位构建可以使未来的群落状态以过去的群落状态为条件。然而，这种历史依赖能在多大程度上引导社区走向功能不同的国家，仍然是一个活跃的辩论主题。利用从肉食性猪笼草野生猪笼草中收集的细菌群落，我们测试了历史对合成猪笼草微观世界中群落组成和功能的影响。我们发现，集合群落的多样性是由系统在装配前的早期阶段的多样性决定的。物种组成也取决于早期的群落状态，这不仅是因为物种池中的差异，还因为相同的物种在不同的群落环境中有不同的动态。重要的是，组成的差异与功能的差异成正比，因为资源使用的概况与组成密切相关，尽管呼吸频率趋同。因此，早期社区结构的差异可以传播到成熟的社区，限制它们的功能。历史偶然性可能会影响社区的组成和功能，但这种影响的程度尚不清楚。在这里，作者使用猪笼草微生物群落来证明群落动态和平衡时的关键代谢功能取决于历史和初始组成。
Niche construction through interspecific interactions can condition future community states on past ones. However, the extent to which such history dependency can steer communities towards functionally different states remains a subject of active debate. Using bacterial communities collected from wild pitchers of the carnivorous pitcher plant, Sarracenia purpurea, we test the effects of history on composition and function across communities assembled in synthetic pitcher plant microcosms. We find that the diversity of assembled communities is determined by the diversity of the system at early, pre-assembly stages. Species composition is also contingent on early community states, not only because of differences in the species pool, but also because the same species have different dynamics in different community contexts. Importantly, compositional differences are proportional to differences in function, as profiles of resource use are strongly correlated with composition, despite convergence in respiration rates. Early differences in community structure can thus propagate to mature communities, conditioning their functional repertoire. Historical contingency can affect community composition and function, but the extent to which this occurs is unclear. Here the authors use pitcher plant microbial communities to demonstrate that community dynamics and key metabolic functions at equilibrium depend on history and initial composition.