Journal
ECOLOGICAL MODELLING
Volume 294, Issue -, Pages 1-18Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ecolmodel.2014.09.003
Keywords
Microbial ecosystem; Aquatic ecosystem; Biogeochemistry; Thermodynamic ecology; Stoichiometry; Ecosystem modeling
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Funding
- National Science Foundation [DEB-1021001]
- Montana Institute on Ecosystems' award from the National Science Foundation EPSCoR Track-1 program [EPS-1101342]
- Division Of Environmental Biology
- Direct For Biological Sciences [1216916] Funding Source: National Science Foundation
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We have developed a mechanistic model of aquatic microbial metabolism and growth, where we apply fundamental ecological theory to simulate the simultaneous influence of multiple potential metabolic reactions on system biogeochemistry. Software design was based on an anticipated cycle of adaptive hypothesis testing, requiring that the model implementation be highly modular, quickly extensible, and easily coupled with hydrologic models in a shared state space. Model testing scenarios were designed to assess the potential for competition over dissolved organic carbon, oxygen, and inorganic nitrogen in simulated batch reactors. Test results demonstrated that the model appropriately weights metabolic processes according to the amount of chemical energy available in the associated biochemical reactions, and results also demonstrated how simulated carbon, nitrogen, and sulfur dynamics were influenced by simultaneous microbial competition for multiple resources. This effort contributes an approach to generalized modeling of microbial metabolism that will be useful for a theoretically and mechanistically principled approach to biogeochemical analysis. (C) 2014 The Author. Published by Elsevier B.V.
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