DOI: 10.1111/gcb.12388
论文题名: Post-clearcut dynamics of carbon, water and energy exchanges in a midlatitude temperate, deciduous broadleaf forest environment
作者: Williams C.A. ; Vanderhoof M.K. ; Khomik M. ; Ghimire B.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2014
卷: 20, 期: 3 起始页码: 992
结束页码: 1007
语种: 英语
英文关键词: Carbon balance
; Evapotranspiration
; Forest disturbance and regrowth
; Forest management
; Net ecosystem productivity
Scopus关键词: biogeochemical cycle
; broad-leaved forest
; carbon balance
; clearcutting
; deciduous forest
; energy balance
; evapotranspiration
; forest management
; net ecosystem production
; radiative transfer
; sensible heat flux
; temperate forest
; water exchange
; United States
; carbon
; carbon dioxide
; water
; article
; biodiversity
; carbon balance
; classification
; climate
; evapotranspiration
; forest disturbance and regrowth
; forest management
; forestry
; metabolism
; net ecosystem productivity
; photosynthesis
; plant
; sunlight
; United States
; carbon balance
; evapotranspiration
; forest disturbance and regrowth
; forest management
; net ecosystem productivity
; Biodiversity
; Carbon
; Carbon Dioxide
; Climate
; Forestry
; Massachusetts
; Photosynthesis
; Plants
; Sunlight
; Water
英文摘要: Clearcutting and other forest disturbances perturb carbon, water, and energy balances in significant ways, with corresponding influences on Earth's climate system through biogeochemical and biogeophysical effects. Observations are needed to quantify the precise changes in these balances as they vary across diverse disturbances of different types, severities, and in various climate and ecosystem type settings. This study combines eddy covariance and micrometeorological measurements of surface-atmosphere exchanges with vegetation inventories and chamber-based estimates of soil respiration to quantify how carbon, water, and energy fluxes changed during the first 3 years following forest clearing in a temperate forest environment of the northeastern US. We observed rapid recovery with sustained increases in gross ecosystem productivity (GEP) over the first three growing seasons post-clearing, coincident with large and relatively stable net emission of CO2 because of overwhelmingly large ecosystem respiration. The rise in GEP was attributed to vegetation changes not environmental conditions (e.g., weather), but attribution to the expansion of leaf area vs. changes in vegetation composition remains unclear. Soil respiration was estimated to contribute 44% of total ecosystem respiration during summer months and coarse woody debris accounted for another 18%. Evapotranspiration also recovered rapidly and continued to rise across years with a corresponding decrease in sensible heat flux. Gross short-wave and long-wave radiative fluxes were stable across years except for strong wintertime dependence on snow covered conditions and corresponding variation in albedo. Overall, these findings underscore the highly dynamic nature of carbon and water exchanges and vegetation composition during the regrowth following a severe forest disturbance, and sheds light on both the magnitude of such changes and the underlying mechanisms with a unique example from a temperate, deciduous broadleaf forest. © 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/61965
Appears in Collections: 影响、适应和脆弱性
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作者单位: Geography Department, Graduate School of Geography, Clark University, 950 Main Street, Worcester, MA 01610, United States
Recommended Citation:
Williams C.A.,Vanderhoof M.K.,Khomik M.,et al. Post-clearcut dynamics of carbon, water and energy exchanges in a midlatitude temperate, deciduous broadleaf forest environment[J]. Global Change Biology,2014-01-01,20(3)