Direct quantification of ecological drift at the population level in synthetic bacterial communities.
Direct quantification of ecological drift at the population level in synthetic bacterial communities.
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DOI：
10.1038/s41396-020-00754-4
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发表时间：
2021-01
期刊：
影响因子：
--
通讯作者：
Daffonchio D
中科院分区：
文献类型：
--
作者：
Fodelianakis S;Valenzuela-Cuevas A;Barozzi A;Daffonchio D
在群落生态学中，漂移指的是种群中随机的出生和死亡。在微生物生态学中，漂移是通过群落快照间接估计的，但以这种方式，几乎不可能将漂移的影响与其他生态过程的影响区分开来。与其他过程隔离量化漂移的受控实验仍然缺失。在这里，我们分离和量化漂移的一系列控制实验的简化和易于处理的细菌群落。我们检测到漂移随机出现在社区内的人口，并导致其增长率变异平均增加1.4-2%。我们进一步使用我们的实验结果来模拟复杂的微生物群落在各种条件下的选择和分散。我们发现，在高选择和低扩散下，漂移的重要性增加，它可以导致约5%的物种损失和约15%的β多样性增加。因漂变而灭绝的物种主要是稀有的，但当选择增加和扩散减少时，它们变得越来越不稀有。我们的研究结果提供了关于细菌群落漂移特性的定量见解，并表明它占自然调查中观察到的随机性的一致部分。
In community ecology, drift refers to random births and deaths in a population. In microbial ecology, drift is estimated indirectly via community snapshots but in this way, it is almost impossible to distinguish the effect of drift from the effect of other ecological processes. Controlled experiments where drift is quantified in isolation from other processes are still missing. Here we isolate and quantify drift in a series of controlled experiments on simplified and tractable bacterial communities. We detect drift arising randomly in the populations within the communities and resulting in a 1.4–2% increase in their growth rate variability on average. We further use our experimental findings to simulate complex microbial communities under various conditions of selection and dispersal. We find that the importance of drift increases under high selection and low dispersal, where it can lead to ~5% of species loss and to ~15% increase in β-diversity. The species extinct by drift are mainly rare, but they become increasingly less rare when selection increases, and dispersal decreases. Our results provide quantitative insights regarding the properties of drift in bacterial communities and suggest that it accounts for a consistent fraction of the observed stochasticity in natural surveys.
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影响因子：
7.4
作者：
Piyasena, Menake E.;Suthanthiraraj, Pearlson P. Austin;Applegate, Robert W., Jr.;Goumas, Andrew M.;Woods, Travis A.;Lopez, Gabriel P.;Graves, Steven W.
通讯作者：
Graves, Steven W.
影响因子：
5.2
作者：
Graham EB;Crump AR;Resch CT;Fansler S;Arntzen E;Kennedy DW;Fredrickson JK;Stegen JC
通讯作者：
Stegen JC
影响因子：
11
作者：
Quince, Christopher;Curtis, Thomas P.;Sloan, William T.
通讯作者：
Sloan, William T.
DOI：
10.1073/pnas.1203849109
发表时间：
2012-10-02
影响因子：
11.1
作者：
Kallmeyer, Jens;Pockalny, Robert;D'Hondt, Steven
通讯作者：
D'Hondt, Steven
影响因子：
6.4
作者：
Amir A;McDonald D;Navas-Molina JA;Debelius J;Morton JT;Hyde E;Robbins-Pianka A;Knight R
通讯作者：
Knight R