carbon balance
; carbon budget
; carbon cycle
; carbon sequestration
; carbon sink
; climate change
; climate effect
; environmental disturbance
; forest ecosystem
; landscape
; net ecosystem production
; stand dynamics
; wildfire
; Lake Tahoe Basin
; United States
; carbon
; article
; carbon cycle
; climate change
; conifer
; fire
; growth, development and aging
; LANDIS-II
; landscape legacy
; model
; net ecosystem carbon balance
; soil
; theoretical model
; tree
; United States
; carbon
; climate change
; fire
; LANDIS-II
; landscape legacy
; model
; net ecosystem carbon balance
; soil
; California
; Carbon Cycle
; Climate Change
; Coniferophyta
; Fires
; Models, Theoretical
; Nevada
; Trees
英文摘要:
Understanding how climate change may influence forest carbon (C) budgets requires knowledge of forest growth relationships with regional climate, long-term forest succession, and past and future disturbances, such as wildfires and timber harvesting events. We used a landscape-scale model of forest succession, wildfire, and C dynamics (LANDIS-II) to evaluate the effects of a changing climate (A2 and B1 IPCC emissions; Geophysical Fluid Dynamics Laboratory General Circulation Models) on total forest C, tree species composition, and wildfire dynamics in the Lake Tahoe Basin, California, and Nevada. The independent effects of temperature and precipitation were assessed within and among climate models. Results highlight the importance of modeling forest succession and stand development processes at the landscape scale for understanding the C cycle. Due primarily to landscape legacy effects of historic logging of the Comstock Era in the late 1880s, C sequestration may continue throughout the current century, and the forest will remain a C sink (Net Ecosystem Carbon Balance > 0), regardless of climate regime. Climate change caused increases in temperatures limited simulated C sequestration potential because of augmented fire activity and reduced establishment ability of subalpine and upper montane trees. Higher temperatures influenced forest response more than reduced precipitation. As the forest reached its potential steady state, the forest could become C neutral or a C source, and climate change could accelerate this transition. The future of forest ecosystem C cycling in many forested systems worldwide may depend more on major disturbances and landscape legacies related to land use than on projected climate change alone.
Environmental Science and Management Department, Portland State University, PO Box 751, Portland, OR 97207, United States; Department of Natural Resources and Environmental Science, University of Nevada, Reno, 1664 N. Virginia St, Mail Stop 186, Reno, Nevada 89557, United States; Pacific Southwest Research Station, USDA Forest Service, 3644 Avtech Parkway, Redding, CA 96002, United States; Forestry Sciences Laboratory, Center for Forest Disturbance Science, USDA Forest Service, 320 Green Street, Athens, GA 30602, United States
Recommended Citation:
Loudermilk E.L.,Scheller R.M.,Weisberg P.J.,et al. Carbon dynamics in the future forest: The importance of long-term successional legacy and climate-fire interactions[J]. Global Change Biology,2013-01-01,19(11)