Redox-informed models of global biogeochemical cycles

Emily J. Zakem (), Martin F. Polz and Michael J. Follows
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Emily J. Zakem: University of Southern California
Martin F. Polz: Massachusetts Institute of Technology
Michael J. Follows: Massachusetts Institute of Technology

Nature Communications, 2020, vol. 11, issue 1, 1-10

Abstract: Abstract Microbial activity mediates the fluxes of greenhouse gases. However, in the global models of the marine and terrestrial biospheres used for climate change projections, typically only photosynthetic microbial activity is resolved mechanistically. To move forward, we argue that global biogeochemical models need a theoretically grounded framework with which to constrain parameterizations of diverse microbial metabolisms. Here, we explain how the key redox chemistry underlying metabolisms provides a path towards this goal. Using this first-principles approach, the presence or absence of metabolic functional types emerges dynamically from ecological interactions, expanding model applicability to unobserved environments. “Nothing is less real than realism. It is only by selection, by elimination, by emphasis, that we get at the real meaning of things.” –Georgia O’Keefe

Date: 2020
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DOI: 10.1038/s41467-020-19454-w

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