articleNature CommunicationsNov 28, 2016GOLD OA

Direct evidence for microbial-derived soil organic matter formation and its ecophysiological controls

CMCynthia M. KallenbachSDSerita D. FreyASA. Stuart Grandy

University of New Hampshire · Colorado State University

PubMed
Indexed incrossrefdoajpubmed

Abstract

Soil organic matter (SOM) and the carbon and nutrients therein drive fundamental submicron- to global-scale biogeochemical processes and influence carbon-climate feedbacks. Consensus is emerging that microbial materials are an important constituent of stable SOM, and new conceptual and quantitative SOM models are rapidly incorporating this view. However, direct evidence demonstrating that microbial residues account for the chemistry, stability and abundance of SOM is still lacking. Further, emerging models emphasize the stabilization of microbial-derived SOM by abiotic mechanisms, while the effects of microbial physiology on microbial residue production remain unclear. Here we provide the first direct evidence…

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Topics & keywords

Topics
Keywords
  • Biogeochemical cycle
  • Soil organic matter
  • Abiotic component
  • Biogeochemistry
  • Environmental chemistry
  • Environmental science
  • Organic matter
  • Microbial population biology
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