DOI: 10.1016/j.foreco.2015.04.002
Scopus记录号: 2-s2.0-84938212963
论文题名: Drought impacts on ecosystem functions of the U.S. National Forests and Grasslands: Part II assessment results and management implications
作者: Sun S. ; Sun G. ; Caldwell P. ; McNulty S. ; Cohen E. ; Xiao J. ; Zhang Y.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2015
卷: 353 起始页码: 269
结束页码: 279
语种: 英语
英文关键词: Droughts
; Ecosystem productivity
; National Forests and Grasslands
; Water yield
Scopus关键词: Climate change
; Conservation
; Decision making
; Drought
; Ecology
; Forestry
; Hydrology
; Restoration
; Timber
; Water supply
; Ecosystem productivity
; Gross primary productivity
; Land surface characteristics
; Management implications
; National forests
; Recreation opportunities
; Standardized precipitation index
; Water yield
; Ecosystems
; benchmarking
; climate change
; climate effect
; drought
; ecosystem function
; environmental assessment
; environmental restoration
; forest management
; grassland
; hydrological change
; land surface
; model validation
; precipitation (climatology)
; primary production
; protected area
; water stress
; water supply
; watershed
; yield
; United States
英文摘要: The 781,000km2 (193million acre) United States National Forests and Grasslands system (NF) provides important ecosystem services such as clean water supply, timber production, wildlife habitat, and recreation opportunities to the American public. Quantifying the historical impacts of climate change and drought on ecosystem functions at the national scale is essential to develop sound forest management and watershed restoration plans under a changing climate. This study applied the previously validated Water Supply and Stress Index model (WaSSI) to 170 NFs in the conterminous U.S. (CONUS) to examine how historical extreme droughts have affected forest water yield (Q) and gross primary productivity (GPP). For each NF, we focused on the five years with the lowest annual SPI3 (Standardized Precipitation Index on a 3-month time scale) during 1962-2012. The extent of extreme droughts as measured by the number of NFs and total area affected by droughts has increased during the last decade. Across all lands in CONUS, the most extreme drought during the past decade occurred in 2002, resulting in a mean reduction of Q by 32% and GPP by 20%. For the 170 individual NFs, on average, the top-five droughts represented a reduction in precipitation by 145mmyr-1 (or 22%), causing reductions in evapotranspiration by 29mmyr-1 (or 8%), Q by 110mmyr-1 (or 37%) and GPP by 65gCm-2yr-1 (or 9%). The responses of the forest hydrology and productivity to the top-five droughts varied spatially due to different land-surface characteristics (e.g., climatology and vegetation) and drought severity at each NF. This study provides a comprehensive benchmark assessment of likely drought impacts on the hydrology and productivity in NFs using consistent methods and datasets across the conterminous U.S. The study results are useful to the forestry decision makers for developing appropriate strategies to restore and protect ecosystem services in anticipating potential future droughts and climate change. © 2015. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65364
Appears in Collections: 影响、适应和脆弱性
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作者单位: College of Hydrometeorology, Nanjing University of Information Science and Technology, Nanjing, Jiangsu Province, China; Department of Marine, Earth and Atmospheric Sciences, North Carolina State University, Raleigh, NC, United States; Eastern Forest Environmental Threat Assessment Center, Southern Research Station, United States Department of Agriculture Forest Services, Raleigh, NC, United States; Coweeta Hydrologic Laboratory, Southern Research Station, USDA-FS, Otto, NC, United States; Earth Systems Research Center, Institute for the Study of Earth, Oceans and Space, University of New Hampshire, Durham, NH, United States
Recommended Citation:
Sun S.,Sun G.,Caldwell P.,et al. Drought impacts on ecosystem functions of the U.S. National Forests and Grasslands: Part II assessment results and management implications[J]. Forest Ecology and Management,2015-01-01,353