干旱区生态环境知识资源中心(Arid): Hydraulic traits that buffer deep-rooted plants from changes in hydrology and climate

Arid

DOI	10.1002/hyp.13587
	Hydraulic traits that buffer deep-rooted plants from changes in hydrology and climate
	Hultine, Kevin R.1; Froend, Ray 2,3; Blasini, Davis 1; Bush, Susan E.1; Karlinski, Melissa 2,3; Koepke, Dan F.1
通讯作者	Hultine, Kevin R.
来源期刊	HYDROLOGICAL PROCESSES
ISSN	0885-6087
EISSN	1099-1085
出版年	2020
卷号	34 期号:2 页码:209-222
英文摘要	Groundwater-dependent ecosystems are often defined by the presence of deeply rooted phreatophytic plants. When connected to groundwater, phreatophytes in arid regions decouple ecosystem net primary productivity from precipitation, underscoring a disproportionately high biodiversity and exchange of resources relative to surrounding areas. However, groundwater-dependent ecosystems are widely threatened due to the effects of water diversions, groundwater abstraction, and higher frequencies of episodic drought and heat waves. The resilience of these ecosystems to shifting ecohydrological-climatological conditions will depend largely on the capacity of dominant, phreatophytic plants to cope with dramatic reductions in water availability and increases in atmospheric water demand. This paper disentangles the broad range of hydraulic traits expressed by phreatophytic vegetation to better understand their capacity to survive or even thrive under shifting ecohydrological conditions. We focus on three elements of plant water relations: (a) hydraulic architecture (including root area to leaf area ratios and rooting depth), (b) xylem structure and function, and (c) stomatal regulation. We place the expression of these traits across a continuum of phreatophytic habits from obligate to semi-obligate to semi-facultative to facultative. Although many species occupy multiple phreatophytic niches depending on access to groundwater, we anticipate that populations are largely locally adapted to a narrow range of ecohydrological conditions regardless of gene flow across ecohydrological gradients. Consequently, we hypothesize that reductions in available groundwater and increases in atmospheric water demand will result in either (a) stand replacement of obligate phreatophytic species with more facultative species as a function of widespread mortality in highly groundwater-dependent populations or (b) directional selection in semi-obligate and semi-facultative phreatophytes towards the expression of traits associated with highly facultative phreatophytes in the absence of species replacement. Anticipated shifts in the expression of hydraulic traits may have profound impacts on water cycling processes, species assemblages, and habitat structure of groundwater-dependent woodlands and riparian forests.
英文关键词	groundwater-dependent vegetation hydraulic architecture local adaptation riparian ecohydrology rooting depth Swan Coastal Plain woody plant mortality xylem cavitation
类型	Article
语种	英语
国家	USA ; Australia
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000497123500001
WOS关键词	WATER RELATIONS ; XYLEM CAVITATION ; PHREATOPHYTIC VEGETATION ; RIPARIAN COTTONWOOD ; GLOBAL CONVERGENCE ; SEASONAL-VARIATION ; GROUNDWATER DEPTH ; BLACK COTTONWOOD ; TREE MORTALITY ; SEED DISPERSAL
WOS类目	Water Resources
WOS研究方向	Water Resources
EI主题词	2019-11-19
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310921
作者单位	1.Desert Bot Garden, Dept Res Conservat & Collect, Phoenix, AZ 85008 USA; 2.Edith Cowan Univ, Ctr Ecosyst Management, Joondalup, WA, Australia; 3.Edith Cowan Univ, Sch Sci, Joondalup, WA, Australia
推荐引用方式 GB/T 7714	Hultine, Kevin R.,Froend, Ray,Blasini, Davis,et al. Hydraulic traits that buffer deep-rooted plants from changes in hydrology and climate[J],2020,34(2):209-222.
APA	Hultine, Kevin R.,Froend, Ray,Blasini, Davis,Bush, Susan E.,Karlinski, Melissa,&Koepke, Dan F..(2020).Hydraulic traits that buffer deep-rooted plants from changes in hydrology and climate.HYDROLOGICAL PROCESSES,34(2),209-222.
MLA	Hultine, Kevin R.,et al."Hydraulic traits that buffer deep-rooted plants from changes in hydrology and climate".HYDROLOGICAL PROCESSES 34.2(2020):209-222.