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Summary: Simple three-pool model accurately describes patterns of
long-term litter decomposition in diverse climates
E . C A R O L A D A I R *w, W I L L I A M J . PA R T O N z§ , S T E V E N J . D E L G R O S S O z§ , W H E N D E E L .
S I LV E R } , M A R K E . H A R M O N k, S O N I A A . H A L L **, I N G R I D C . B U R K E § w w and
S T E P H E N C . H A R T zz§ §
*Department of Ecology, Evolution, and Behavior, University of Minnesota, Saint Paul, 1987 Upper Buford Circle, MN 55108,
USA, wDepartment of Forest Resources, University of Minnesota, Saint Paul, MN 55108, USA, zNatural Resource Ecology
Laboratory, Colorado State University, Fort Collins, CO 80523, USA, §Graduate Degree Program in Ecology, Colorado State
University, Fort Collins, CO 80523, USA, }Ecosystem Sciences Division, Department of Environmental Science, Policy, and
Management, University of California, Berkeley, CA, USA, kDepartment of Forest Sciences, Oregon State University, Corvallis, OR
97331, USA, **The Nature Conservancy, North Central Washington Field Office, Wenatchee, WA 98801, USA, wwDepartment of
Forest, Rangeland, and Watershed Stewardship, Colorado State University, Fort Collins, CO 80523, USA, zzSchool of Forestry,
Northern Arizona University, PO Box 15018, Flagstaff, AZ 86011-5018, USA, §§Merriam-Powell Center for Environmental
Research, Northern Arizona University, PO Box 15018, Flagstaff, AZ 86011-5018, USA
Abstract
As atmospheric CO2 increases, ecosystem carbon sequestration will largely depend on
how global changes in climate will alter the balance between net primary production and
decomposition. The response of primary production to climatic change has been
examined using well-validated mechanistic models, but the same is not true for decom-
position, a primary source of atmospheric CO2. We used the Long-term Intersite Decom-
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