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Article
Modeling priming effects on microbial consumption of dissolved organic carbon in rivers
Journal of Geophysical Research (2014)
  • Michelle A. Baker, Utah State University
  • E R Hotchkiss
  • R O Hall, Jr.
  • E J Rosi-Marshall
  • J L Tank
Abstract
Rivers receive and process large quantities of terrestrial dissolved organic carbon (DOC). Biologically available (unstable) DOC leached from primary producers may stimulate (i.e., prime) the consumption of more stable terrestrially derived DOC by heterotrophic microbes. We measured microbial DOC consumption (i.e., decay rates) from contrasting C sources in 10 rivers in the western and Midwestern United States using short-term bioassays of river water, soil and algal leachates, glucose, and commercial humate. We added inorganic nutrients (ammonium and phosphorus) to a subset of bioassays. We also amended a subset of river, soil, and commercial humate bioassays with glucose or algal leachates to test the hypothesis that unstable DOC primes consumption of more stable DOC...
Disciplines
Publication Date
2014
Publisher Statement
DOI: 10.1002/2013JG002599
Citation Information
Michelle A. Baker, E R Hotchkiss, R O Hall, E J Rosi-Marshall, et al.. "Modeling priming effects on microbial consumption of dissolved organic carbon in rivers" Journal of Geophysical Research Vol. 119 Iss. 5 (2014)
Available at: http://works.bepress.com/michelle_baker/67/