DOI: 10.1111/gcb.12224
论文题名: Long-term changes in forest carbon under temperature and nitrogen amendments in a temperate northern hardwood forest
作者: Savage K.E. ; Parton W.J. ; Davidson E.A. ; Trumbore S.E. ; Frey S.D.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2013
卷: 19, 期: 8 起始页码: 2389
结束页码: 2400
语种: 英语
英文关键词: ForCent
; Nitrogen
; Radiocarbon isotopes
; Soil organic matter
; Soil warming
Scopus关键词: carbon
; nitrogen
; organic compound
; soil organic matter
; aboveground biomass
; air temperature
; atmospheric sink
; belowground biomass
; carbon flux
; carbon sink
; climate change
; climate effect
; forest ecosystem
; long-term change
; nitrogen
; radionuclide
; soil amendment
; soil carbon
; soil organic matter
; article
; biological model
; carbon cycle
; chemistry
; climate change
; ecosystem
; environmental monitoring
; evaluation
; ForCent
; metabolism
; methodology
; radiocarbon isotopes
; soil
; soil warming
; United States
; ForCent
; nitrogen
; radiocarbon isotopes
; soil organic matter
; soil warming
; Carbon
; Carbon Cycle
; Carbon Isotopes
; Climate Change
; Ecosystem
; Environmental Monitoring
; Massachusetts
; Models, Biological
; Nitrogen
; Organic Chemicals
; Soil
; Harvard Forest
; Massachusetts
; United States
英文摘要: Currently, forests in the northeastern United States are net sinks of atmospheric carbon. Under future climate change scenarios, the combined effects of climate change and nitrogen deposition on soil decomposition, aboveground processes, and the forest carbon balance remain unclear. We applied carbon stock, flux, and isotope data from field studies at the Harvard forest, Massachusetts, to the ForCent model, which integrates above- and belowground processes. The model was able to represent decadal-scale measurements in soil C stocks, mean residence times, fluxes, and responses to a warming and N addition experiment. The calibrated model then simulated the longer term impacts of warming and N deposition on the distribution of forest carbon stocks. For simulation to 2030, soil warming resulted in a loss of soil organic matter (SOM), decreased allocation to belowground biomass, and gain of aboveground carbon, primarily in large wood, with an overall small gain in total system carbon. Simulated nitrogen addition resulted in a small increase in belowground carbon pools, but a large increase in aboveground large wood pools, resulting in a substantial increase in total system carbon. Combined warming and nitrogen addition simulations showed a net gain in total system carbon, predominately in the aboveground carbon pools, but offset somewhat by losses in SOM. Hence, the impact of continuation of anthropogenic N deposition on the hardwood forests of the northeastern United States may exceed the impact of warming in terms of total ecosystem carbon stocks. However, it should be cautioned that these simulations do not include some climate-related processes, different responses from changing tree species composition. Despite uncertainties, this effort is among the first to use decadal-scale observations of soil carbon dynamics and results of multifactor manipulations to calibrate a model that can project integrated aboveground and belowground responses to nitrogen and climate changes for subsequent decades. © 2013 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62370
Appears in Collections: 影响、适应和脆弱性
There are no files associated with this item.
作者单位: Woods Hole Research Center, 149 Woods Hole Rd, Falmouth, MA 02540, United States; Colorado State University, Fort Collins, CO 80523, United States; Max Planck Institute for Biogeochemistry, 07745 Jena, Germany; University of New Hampshire, Durham, NH 03824, United States
Recommended Citation:
Savage K.E.,Parton W.J.,Davidson E.A.,et al. Long-term changes in forest carbon under temperature and nitrogen amendments in a temperate northern hardwood forest[J]. Global Change Biology,2013-01-01,19(8)