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Workflow Based on the Combination of Isotopic Tracer Experiments to Investigate Microbial Metabolism of Multiple Nutrient Sources

Workflow Based on the Combination of Isotopic Tracer Experiments to Investigate Microbial Metabolism of Multiple Nutrient Sources

Published on: January 22, 2018

Nutrient stoichiometry shapes microbial coevolution.

Megan L Larsen¹, Steven W Wilhelm², Jay T Lennon¹

¹Department of Biology, Indiana University, Bloomington, IN, 47405, USA.

Ecology Letters

|March 30, 2019

Summary

This summary is machine-generated.

Nutrient scarcity drives coevolution between cyanobacteria and phages, altering biodiversity. This study reveals how nitrogen or phosphorus limitation impacts host-parasite interactions and evolutionary trajectories.

Keywords:

Arms race bacteria networks phage resistance resources

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Published on: May 28, 2007

Area of Science:

Microbial Ecology
Evolutionary Biology
Biogeochemistry

Background:

Coevolutionary dynamics are shaped by resource availability and environmental conditions.
Nutrient stoichiometry, specifically nitrogen (N) and phosphorus (P) limitation, can influence host-parasite interactions.
Understanding these eco-evolutionary feedbacks is crucial for microbial community functioning.

Discussion:

Long-term chemostat experiments with marine Synechococcus and lytic phages under N or P limitation revealed altered host-parasite interaction stability.
Directional selection for phage resistance suggests arms-race dynamics, while fluctuating phage infectivity indicates negative frequency-dependent selection.
Infection networks showed reduced modularity under N-limitation compared to P-limitation, implying host-range contraction and asymmetric coevolution.

Key Insights:

Nutrient stoichiometry significantly impacts the mode and stability of microbial coevolution.
Nitrogen and phosphorus limitation drive distinct coevolutionary trajectories and network structures in host-parasite systems.
Observed patterns of resistance and infectivity highlight the role of resource scarcity in shaping biodiversity through coevolution.

Outlook:

Investigating nutrient stoichiometry's role in microbial coevolution can predict changes in environmental and host-associated microbial communities.
Further research into eco-evolutionary feedbacks will enhance our understanding of biodiversity maintenance and ecosystem functioning.
This study provides a foundation for exploring how nutrient availability shapes microbial interactions in diverse ecosystems.