期刊
ECOLOGY LETTERS
卷 22, 期 5, 页码 838-846出版社
WILEY
DOI: 10.1111/ele.13241
关键词
Acinetobacter johnsonii; cross-feeding; exploitation; mathematical modelling; population dynamics; Pseudomonas putida; rate of environmental change; resource competition; species interactions; synthetic communities
类别
资金
- Swiss National Foundation
- European Molecular Biological Organization (EMBO) long-term postdoctoral fellowship [ALTF 241-2015]
- Adaptation to a Changing environment (ACE) postdoctoral fellowship
- CASCADE fellowship [PCOFUND-GA-2012-600181]
- Eawag
- ETH
Species interactions change when the external conditions change. How these changes affect microbial community properties is an open question. We address this question using a two-species consortium in which species interactions change from exploitation to competition depending on the carbon source provided. We built a mathematical model and calibrated it using single-species growth measurements. This model predicted that low frequencies of change between carbon sources lead to species loss, while intermediate and high frequencies of change maintained both species. We experimentally confirmed these predictions by growing co-cultures in fluctuating environments. These findings complement more established concepts of a diversity peak at intermediate disturbance frequencies. They also provide a mechanistic understanding for how the dynamics at the community level emerges from single-species behaviours and interspecific interactions. Our findings suggest that changes in species interactions can profoundly impact the ecological dynamics and properties of microbial systems.
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