DOI: 10.5194/hess-21-981-2017
Scopus记录号: 2-s2.0-85013150646
论文题名: Water yield following forest-grass-forest transitions
作者: Elliott K ; J ; , Caldwell P ; V ; , Brantley S ; T ; , Miniat C ; F ; , Vose J ; M ; , Swank W ; T
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2017
卷: 21, 期: 2 起始页码: 981
结束页码: 997
语种: 英语
Scopus关键词: Agriculture
; Forestry
; Land use
; Water supply
; Watersheds
; Above ground biomass
; Experimental watersheds
; Forest regeneration
; Forest transition
; Land use and land cover change
; Management practices
; Southern appalachians
; Species composition
; Reforestation
; abandoned land
; evapotranspiration
; forest ecosystem
; grassland
; land cover
; land use change
; quantitative analysis
; succession
; transition zone
; water budget
; water management
; water use
; Appalachians
; Acer
; Carya
; Liriodendron
; Quercus
英文摘要: Many currently forested areas in the southern Appalachians were harvested in the early 1900s and cleared for agriculture or pasture, but have since been abandoned and reverted to forest (old-field succession). Land-use and land-cover changes such as these may have altered the timing and quantity of water yield (Q). We examined 80 years of streamflow and vegetation data in an experimental watershed that underwent forest-grass-forest conversion (i.e., old-field succession treatment). We hypothesized that changes in forest species composition and water use would largely explain long-term changes in Q. Aboveground biomass was comparable among watersheds before the treatment (208.3 Mg ha-1), and again after 45 years of forest regeneration (217.9 Mg ha-1). However, management practices in the treatment watershed altered resulting species composition compared to the reference watershed. Evapotranspiration (ET) and Q in the treatment watershed recovered to pretreatment levels after 9 years of abandonment, then Q became less (averaging 5.4 % less) and ET more (averaging 4.5 % more) than expected after the 10th year up to the present day. We demonstrate that the decline in Q and corresponding increase in ET could be explained by the shift in major forest species from predominantly Quercus and Carya before treatment to predominantly Liriodendron and Acer through old-field succession. The annual change in Q can be attributed to changes in seasonal Q. The greatest management effect on monthly Q occurred during the wettest (i.e., above median Q) growing-season months, when Q was significantly lower than expected. In the dormant season, monthly Q was higher than expected during the wettest months. © 2017 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79255
Appears in Collections: 气候变化事实与影响
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作者单位: USDA Forest Service, Southern Research Station, Coweeta Hydrologic Lab, Otto, NC, United States; Joseph W. Jones Ecological Research Center, Ichauway, Newton, GA, United States; UDSA Forest Service, Southern Research Station, Center for Integrated Forest Science, Raleigh, NC, United States
Recommended Citation:
Elliott K,J,, Caldwell P,et al. Water yield following forest-grass-forest transitions[J]. Hydrology and Earth System Sciences,2017-01-01,21(2)