Environmental fluctuations reshape an unexpected diversity-disturbance relationship in a microbial community.
Environmental fluctuations reshape an unexpected diversity-disturbance relationship in a microbial community.
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环境波动重塑了微生物群落中意想不到的多样性-干扰关系。
DOI：
10.7554/elife.67175
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发表时间：
2021-09-03
期刊：
影响因子：
7.7
通讯作者：
Khalil AS
中科院分区：
文献类型：
--
作者：
Mancuso CP;Lee H;Abreu CI;Gore J;Khalil AS
长期以来，人们一直认为环境扰动在塑造生态系统的多样性和组成方面发挥着重要作用。然而，无法指定的干扰实验的特点产生了不一致的图片的多样性干扰关系（DDRs）。在这里，使用高通量的可编程培养系统，我们进行了土壤来源的细菌群落稀释干扰配置文件与不同的强度（平均稀释率），适用于不断或不同频率的波动。我们观察到一个意想不到的U形的社区多样性和干扰强度之间的关系，在没有波动。增加波动增加了社区的多样性，消除了U形。我们所有的结果都很好地捕捉到了Monod消费者资源模型，这也解释了U形DDR如何通过一种新的“利基翻转”机制出现。从广义上讲，我们结合的实验和建模框架展示了环境干扰的不同特征如何以复杂的方式相互作用，以管理生态系统组装，并提供了重塑微生物组组成的策略。
Environmental disturbances have long been theorized to play a significant role in shaping the diversity and composition of ecosystems. However, an inability to specify the characteristics of a disturbance experimentally has produced an inconsistent picture of diversity-disturbance relationships (DDRs). Here, using a high-throughput programmable culture system, we subjected a soil-derived bacterial community to dilution disturbance profiles with different intensities (mean dilution rates), applied either constantly or with fluctuations of different frequencies. We observed an unexpected U-shaped relationship between community diversity and disturbance intensity in the absence of fluctuations. Adding fluctuations increased community diversity and erased the U-shape. All our results are well-captured by a Monod consumer resource model, which also explains how U-shaped DDRs emerge via a novel ‘niche flip’ mechanism. Broadly, our combined experimental and modeling framework demonstrates how distinct features of an environmental disturbance can interact in complex ways to govern ecosystem assembly and offers strategies for reshaping the composition of microbiomes.