Multistability and regime shifts in microbial communities explained by competition for essential nutrients
Multistability and regime shifts in microbial communities explained by competition for essential nutrients
复制标题
微生物群落的多重稳定性和政权转变通过对必需营养素的竞争来解释
作者：
V. Dubinkina;Yulia Fridman;P. Pandey;S. Maslov
对于相同的环境参数，微生物群落通常具有几种可能的物种组成或群落状态。这些参数的变化可能会引发这些社区状态之间突然和持续的转变（政权更迭）。然而，人们对微生物群落多稳定性的主要决定因素和机制知之甚少。在这里，我们介绍并研究了一种资源显式模型，其中微生物竞争两种类型的必需营养素。我们采用稳定匹配问题的博弈论方法来识别微生物群落的所有可能的物种组成。然后，我们根据它们对三种扰动的适应能力对它们进行分类：养分供应的波动、新物种的入侵以及现有物种丰度的微小变化。我们观察了多重稳定性，并探索了模型中稳定状态之间复杂的政权转变网络。我们的结果表明，多重稳定性需要微生物物种具有不同的必需营养素化学计量。我们还发现，平衡的养分供应促进了多重稳定性和物种多样性，但使单个群落状态不太稳定。
Microbial communities routinely have several possible species compositions or community states observed for the same environmental parameters. Changes in these parameters can trigger abrupt and persistent transitions (regime shifts) between such community states. Yet little is known about the main determinants and mechanisms of multistability in microbial communities. Here we introduce and study a resource-explicit model in which microbes compete for two types of essential nutrients. We adapt game-theoretical methods of the stable matching problem to identify all possible species compositions of a microbial community. We then classify them by their resilience against three types of perturbations: fluctuations in nutrient supply, invasions by new species, and small changes of abundances of existing ones. We observe multistability and explore an intricate network of regime shifts between stable states in our model. Our results suggest that multistability requires microbial species to have different stoichiometries of essential nutrients. We also find that balanced nutrient supply promote multistability and species diversity yet make individual community states less stable.
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影响因子：
8.6
作者：
Posfai A;Taillefumier T;Wingreen NS
通讯作者：
Wingreen NS
影响因子：
4.6
作者：
Mello BL;Alessi AM;McQueen-Mason S;Bruce NC;Polikarpov I
通讯作者：
Polikarpov I
影响因子：
64.8
作者：
Browning, Thomas J.;Achterberg, Eric P.;Moore, C. Mark
通讯作者：
Moore, C. Mark
DOI：
10.1126/science.aat1168
发表时间：
2018-08-03
期刊：
Science (New York, N.Y.)
影响因子：
--
作者：
Goldford JE;Lu N;Bajić D;Estrela S;Tikhonov M;Sanchez-Gorostiaga A;Segrè D;Mehta P;Sanchez A
通讯作者：
Sanchez A