期刊
JOURNAL OF THE ROYAL SOCIETY INTERFACE
卷 18, 期 183, 页码 -出版社
ROYAL SOC
DOI: 10.1098/rsif.2021.0613
关键词
competitive exclusion; environmental switching; demographic noise; chemostat; beta diversity; intermediate disturbance hypothesis
资金
- University of Lausanne
- Nakajima foundation
- European Research Council [715097]
- European Research Council (ERC) [715097] Funding Source: European Research Council (ERC)
The study found that environmental fluctuations can impact the diversity of microbial communities, especially under harsh conditions. In harsh conditions, the probability of weaker species driving the stronger one extinct increases, reaching a peak at different switching rates. This complex relationship has made it historically difficult to find patterns between environmental fluctuations and diversity.
Microorganisms live in environments that inevitably fluctuate between mild and harsh conditions. As harsh conditions may cause extinctions, the rate at which fluctuations occur can shape microbial communities and their diversity, but we still lack an intuition on how. Here, we build a mathematical model describing two microbial species living in an environment where substrate supplies randomly switch between abundant and scarce. We then vary the rate of switching as well as different properties of the interacting species, and measure the probability of the weaker species driving the stronger one extinct. We find that this probability increases with the strength of demographic noise under harsh conditions and peaks at either low, high, or intermediate switching rates depending on both species' ability to withstand the harsh environment. This complex relationship shows why finding patterns between environmental fluctuations and diversity has historically been difficult. In parameter ranges where the fittest species was most likely to be excluded, however, the beta diversity in larger communities also peaked. In sum, how environmental fluctuations affect interactions between a few species pairs predicts their effect on the beta diversity of the whole community.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据