Ecohydrological implications of woody plant encroachment

被引:595
|
作者
Huxman, TE [1 ]
Wilcox, BP
Breshears, DD
Scott, RL
Snyder, KA
Small, EE
Hultine, K
Pockman, WT
Jackson, RB
机构
[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
关键词
carbon cycling; ecohydrology; evapotranspiration; vegetation change; woody plant encroachment;
D O I
10.1890/03-0583
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
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.
引用
收藏
页码:308 / 319
页数:12
相关论文
共 50 条
  • [1] Is woody plant encroachment bad? Benefits of woody plant encroachment—A review
    Albert Orodena Aweto
    [J]. Landscape Ecology, 39
  • [2] Is woody plant encroachment bad? Benefits of woody plant encroachment-A review
    Aweto, Albert Orodena
    [J]. LANDSCAPE ECOLOGY, 2024, 39 (02)
  • [3] Ecohydrological connectivity: A unifying framework for understanding how woody plant encroachment alters the water cycle in drylands
    Wilcox, Bradford P.
    Basant, Shishir
    Olariu, Horia
    Leite, Pedro A. M.
    [J]. FRONTIERS IN ENVIRONMENTAL SCIENCE, 2022, 10
  • [4] Connecting the Dots: How Ecohydrological Connectivity Can Support Remote Sensing and Modeling to Inform Management of Woody Plant Encroachment
    Schmidt, Hailey E.
    Leyton, Javier M. Osorio
    Popescu, Sorin C.
    Yarasca, Efrain Noa
    Sarkar, Sayantan
    Wilcox, Bradford P.
    [J]. RANGELAND ECOLOGY & MANAGEMENT, 2024, 95 : 84 - 99
  • [5] Drivers of woody plant encroachment over Africa
    Z. S. Venter
    M. D. Cramer
    H.-J. Hawkins
    [J]. Nature Communications, 9
  • [6] Drivers of woody plant encroachment over Africa
    Venter, Z. S.
    Cramer, M. D.
    Hawkins, H. -J.
    [J]. NATURE COMMUNICATIONS, 2018, 9
  • [7] Ecohydrological impacts of woody-plant encroachment: seasonal patterns of water and carbon dioxide exchange within a semiarid riparian environment
    Scott, RL
    Huxman, TE
    Williams, DG
    Goodrich, DC
    [J]. GLOBAL CHANGE BIOLOGY, 2006, 12 (02) : 311 - 324
  • [8] Understanding woody plant encroachment: A plant functional trait approach
    de Jonge, Inger K.
    Olff, Han
    Mayemba, Emilian P.
    Berger, Stijn J.
    Veldhuis, Michiel P.
    [J]. ECOLOGICAL MONOGRAPHS, 2024, 94 (03)
  • [9] Woody Plant Encroachment Mitigated Differentially by Fire and Herbicide
    Scholtz, Rheinhardt
    Polo, John A.
    Fuhlendorf, Samuel D.
    Engle, David M.
    Weir, John R.
    [J]. RANGELAND ECOLOGY & MANAGEMENT, 2018, 71 (02) : 239 - 244
  • [10] Spatial patterns of woody plant encroachment in a temperate grassland
    Fogarty, Dillon T.
    Peterson, Robert B.
    Twidwell, Dirac
    [J]. LANDSCAPE ECOLOGY, 2022, 37 (11) : 2835 - 2846