caa a22 4500 605517401 CHVBK 20210128100719.0 cr unu---uuuuu 210128e20151101xx s 000 0 eng 10.1007/s10533-015-0142-z doi (NATIONALLICENCE)springer-10.1007/s10533-015-0142-z Soil incubations reproduce field methane dynamics in a subarctic wetland [Elektronische Daten] [Suzanne Hodgkins, Jeffrey Chanton, Lauren Langford, Carmody McCalley, Scott Saleska, Virginia Rich, Patrick Crill, William Cooper] A major challenge in peatland carbon cycle modeling is the estimation of subsurface methane (CH4) and carbon dioxide (CO2) production and consumption rates and pathways. The most common methods for modeling these processes are soil incubations and stable isotope modeling, both of which may involve departures from field conditions. To explore the impacts of these departures, we measured CH4/CO2 concentration ratios and 13C fractionation factors (αC, indicating CH4 production pathways) in field pore water from a thawing subarctic peatland, and compared these values to those observed in incubations of corresponding peat samples. Incubation CH4/CO2 production ratios were significantly and positively correlated with observed field CH4/CO2 concentration ratios, though observed field ratios were ~20% of those in incubations due to CH4's lower solubility in pore water. After correcting the field ratios for CH4 loss with an isotope mass balance model, the incubation CH4/CO2 ratios and αC were both significantly positively correlated with field ratios and αC (respectively), both with slopes indistinguishable from 1. Although CH4/CO2 ratios and αC were slightly higher in the incubations, these shifts were consistent along the thaw progression, indicating that ex situ incubations can replicate trends in in situ CH4 production. Springer International Publishing Switzerland, 2015 Peatlands nationallicence Methane nationallicence Geochemistry nationallicence Soil incubations nationallicence Stable isotopes nationallicence Hodgkins Suzanne Department of Earth, Ocean, and Atmospheric Science, Florida State University, 32306, Tallahassee, FL, USA aut Chanton Jeffrey Department of Earth, Ocean, and Atmospheric Science, Florida State University, 32306, Tallahassee, FL, USA aut Langford Lauren Department of Earth, Ocean, and Atmospheric Science, Florida State University, 32306, Tallahassee, FL, USA aut McCalley Carmody Thomas H. Gosnell School of Life Sciences, Rochester Institute of Technology, 14623, Rochester, NY, USA aut Saleska Scott Department of Ecology and Evolutionary Biology, University of Arizona, 85716, Tucson, AZ, USA aut Rich Virginia Department of Soil, Water and Environmental Science, University of Arizona, 85716, Tucson, AZ, USA aut Crill Patrick Department of Geological Sciences, Stockholm University, 10691, Stockholm, Sweden aut Cooper William Department of Chemistry and Biochemistry, Florida State University, 32306, Tallahassee, FL, USA aut Biogeochemistry Springer International Publishing 126/1-2(2015-11-01), 241-249 0168-2563 126:1-2<241 2015 126 10533 https://doi.org/10.1007/s10533-015-0142-z text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 brief-communication jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10533-015-0142-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hodgkins Suzanne Department of Earth, Ocean, and Atmospheric Science, Florida State University, 32306, Tallahassee, FL, USA aut NATIONALLICENCE 700 1- Chanton Jeffrey Department of Earth, Ocean, and Atmospheric Science, Florida State University, 32306, Tallahassee, FL, USA aut NATIONALLICENCE 700 1- Langford Lauren Department of Earth, Ocean, and Atmospheric Science, Florida State University, 32306, Tallahassee, FL, USA aut NATIONALLICENCE 700 1- McCalley Carmody Thomas H. Gosnell School of Life Sciences, Rochester Institute of Technology, 14623, Rochester, NY, USA aut NATIONALLICENCE 700 1- Saleska Scott Department of Ecology and Evolutionary Biology, University of Arizona, 85716, Tucson, AZ, USA aut NATIONALLICENCE 700 1- Rich Virginia Department of Soil, Water and Environmental Science, University of Arizona, 85716, Tucson, AZ, USA aut NATIONALLICENCE 700 1- Crill Patrick Department of Geological Sciences, Stockholm University, 10691, Stockholm, Sweden aut NATIONALLICENCE 700 1- Cooper William Department of Chemistry and Biochemistry, Florida State University, 32306, Tallahassee, FL, USA aut NATIONALLICENCE 773 0- Biogeochemistry Springer International Publishing 126/1-2(2015-11-01), 241-249 0168-2563 126:1-2<241 2015 126 10533