Microbial Dormancy Supports Multi-Species Coexistence Under Resource Fluctuations

Area of Science:

• Microbial Ecology
• Theoretical Ecology
• Evolutionary Biology

Background:

• Microbial dormancy is an adaptive strategy for survival during fluctuating resource availability.
• Dormancy is linked to maintaining microbial diversity, but the underlying mechanisms are unclear.
• Density-dependent feedbacks are crucial for stable species coexistence.

Purpose of the Study:

• To elucidate the mechanisms by which microbial dormancy promotes stable coexistence under resource fluctuations.
• To investigate how dormancy influences density-dependent feedbacks and microbial community structure.
• To explore the potential for multi-species coexistence involving dormancy and other microbial strategies.

Main Methods:

• Analysis of consumer-resource models.
• Mathematical modeling of microbial population dynamics.
• Investigating trade-offs between dormancy, resource acquisition, and resource utilization.

Main Results:

• Dormancy provides a stable coexistence mechanism by exploiting resource fluctuations and reducing variability.
• Dormant microbes establish negative frequency dependence, promoting coexistence.
• A three-species model demonstrates coexistence of dormant, gleaner, and opportunist strategies, defying competitive exclusion.
• Multi-species coexistence arises from complex assembly rules not predictable from pairwise interactions.

Conclusions:

• Microbial dormancy is a key factor in maintaining diversity through stabilizing feedbacks.
• Dormancy can enable novel forms of multi-species coexistence, challenging traditional ecological theories.
• This study opens avenues for further theoretical and empirical research into microbial community dynamics and diversity maintenance.