Arid
DOI10.1890/03-0583
Ecohydrological implications of woody plant encroachment
Huxman, TE; Wilcox, BP; Breshears, DD; Scott, RL; Snyder, KA; Small, EE; Hultine, K; Pockman, WT; Jackson, RB
通讯作者Huxman, TE
来源期刊ECOLOGY
ISSN0012-9658
出版年2005
卷号86期号:2页码:308-319
英文摘要

Increases in the abundance or density of woody plants in historically semiarid and arid grassland ecosystems have important ecological, hydrological, and socioeconomic implications. Using a simplified water-balance model, we propose a framework for conceptualizing how woody plant encroachment is likely to affect components of the water cycle within these ecosystems. We focus in particular on streamflow and the partitioning of evapotranspiration into evaporation and transpiration. On the basis of this framework, we Suggest that streamflow and evaporation processes are affected by woody plant encroachment in different ways, depending on the degree and seasonality of aridity and the availability of subsurface water. Differences in landscape physiography, climate, and runoff mechanisms mediate the influence of woody plants on hydrological processes. Streamflow is expected to decline as a result of woody plant encroachment in landscapes dominated by subsurface flow regimes. Similarly, encroachment of woody plants can be expected to produce an increase in the fractional contribution of bare soil evaporation to evapotranspiration in semiarid ecosystems, Whereas such shifts may be small or negligible in both subhumid and and ecosystems. This framework for considering the effects of woody plant encroachment highlights important ecological and hydrological interactions that serve as a basis for predicting other ecological aspects of vegetation change-such as potential changes in carbon cycling within an ecosystem. In locations where woody plant encroachment results in increased plant transpiration and concurrently the availability of soil water is reduced, increased accumulation of carbon in soils emerges as one prediction. Thus, explicitly considering the ecohydrological linkages associated with vegetation change provides needed information on the consequences of woody plant encroachment on water yield, carbon cycling, and other processes.


英文关键词carbon cycling ecohydrology evapotranspiration vegetation change woody plant encroachment
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000227634400005
WOS关键词CHIHUAHUAN DESERT ; MOJAVE DESERT ; WATER YIELD ; NEW-MEXICO ; GRASSLAND/FOREST CONTINUUM ; CATCHMENT EXPERIMENTS ; AMERICAN SOUTHWEST ; VEGETATION CHANGES ; TEXAS RANGELANDS ; ROOTING DEPTH
WOS类目Ecology
WOS研究方向Environmental Sciences & Ecology
来源机构University of Arizona
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/148865
作者单位(1)Univ Arizona, Tucson, AZ 85721 USA;(2)Texas A&M Univ, College Stn, TX 77843 USA;(3)Los Alamos Natl Lab, Los Alamos, NM 87545 USA;(4)USDA, ARS, SW Watershed Res Ctr, Tucson, AZ 85719 USA;(5)USDA, ARS, Jornada Expt Range, Las Cruces, NM 88003 USA;(6)Univ Colorado, Boulder, CO 80309 USA;(7)Univ Utah, Dept Biol, Salt Lake City, UT 84112 USA;(8)Univ New Mexico, Dept Biol, Albuquerque, NM 87131 USA;(9)Duke Univ, Dept Biol, Durham, NC 27708 USA;(10)Duke Univ, Nicholas Sch Environm & Earth Sci, Durham, NC 27708 USA
推荐引用方式
GB/T 7714
Huxman, TE,Wilcox, BP,Breshears, DD,et al. Ecohydrological implications of woody plant encroachment[J]. University of Arizona,2005,86(2):308-319.
APA Huxman, TE.,Wilcox, BP.,Breshears, DD.,Scott, RL.,Snyder, KA.,...&Jackson, RB.(2005).Ecohydrological implications of woody plant encroachment.ECOLOGY,86(2),308-319.
MLA Huxman, TE,et al."Ecohydrological implications of woody plant encroachment".ECOLOGY 86.2(2005):308-319.
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