Carbon Cycle Implications of Soil Microbial Interactions
The soil environment contains the largest pool of organic carbon on the Earth’s surface, with soil carbon residency and flux controlled by microbial metabolism. Despite the fact that microbial interactions have metabolic implications, these interactions are often overlooked in conceptual models of the soil carbon cycle. Here, we hypothesize that microbial interactions are intrinsically coupled to carbon cycling through eco-evolutionary principles. Interactions drive phenotypic responses that result in allocation pattern shifts and changes in carbon use efficiency. These changes promote alterations in resource availability and community structure, thereby creating selective pressures that contribute to diffuse evolutionary mechanisms. The outcomes then feed back into microbial metabolic operations with consequences for carbon turnover, continuing a feedback loop of microbial interactions, evolutionary processes, and the carbon cycle.
KeywordsMicrobial interactions Carbon cycle Microbial metabolism Soil biofilms Public goods Eco-evolutionary dynamics
Compliance with Ethical Standards
This study was funded by the US Department of Energy, Office of Science, BER, grant #DE-SC0016410.
Conflict of Interest
Kelly I. Ramin declares that she has no conflict of interest. Steven D. Allison declares that he has no conflict of interest.
This article does not contain any studies with human participants or animals performed by any of the authors.
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