干旱区生态环境知识资源中心(Arid): A brown wave of riparian woodland mortality following groundwater declines during the 2012-2019 California drought

Arid

DOI	10.1088/1748-9326/ac1377
	A brown wave of riparian woodland mortality following groundwater declines during the 2012-2019 California drought
	Kibler, Christopher L.; Schmidt, E. Claire; Roberts, Dar A.; Stella, John C.; Kui, Li; Lambert, Adam M.; Singer, Michael Bliss
通讯作者	Kibler, CL (corresponding author), Univ Calif Santa Barbara, Dept Geog, Santa Barbara, CA 93106 USA.
来源期刊	ENVIRONMENTAL RESEARCH LETTERS
ISSN	1748-9326
出版年	2021
卷号	16 期号:8
英文摘要	As droughts become more frequent and more severe under anthropogenic climate change, water stress due to diminished subsurface supplies may threaten the health and function of semi-arid riparian woodlands, which are assumed to be largely groundwater dependent. To better support the management of riparian woodlands under changing climatic conditions, it is essential to understand the sensitivity of riparian woodlands to depth to groundwater (DTG) across space and time. In this study, we examined six stands of riparian woodland along 28 km of the Santa Clara River in southern California. Combining remote sensing data of fractional land cover, based on spectral mixture analysis, with historical groundwater data, we assessed changes in riparian woodland health in response to DTG during the unprecedented 2012-2019 California drought. We observed a coherent 'brown wave' of tree mortality, characterized by decreases in healthy vegetation cover and increases in dead/woody vegetation cover, which progressed downstream through the Santa Clara River corridor between 2012 and 2016. We also found consistent, significant relationships between DTG and healthy vegetation cover, and separately between DTG and dead/woody vegetation cover, indicating that woodland health deteriorated in a predictable fashion as the water table declined at different sites and different times. Based on these findings, we conclude that the brown wave of vegetation dieback was likely caused by local changes in DTG associated with the propagation of precipitation deficits into a depleted shallow alluvial aquifer. These factors suggest that semi-arid riparian woodlands are strongly dependent on shallow groundwater availability, which is in turn sensitive to climate forcing.
英文关键词	riparian remote sensing drought forest die-off phreatophyte groundwater dependent ecosystem California
类型	Article
语种	英语
开放获取类型	gold, Green Accepted
收录类别	SCI-E
WOS记录号	WOS:000678346300001
WOS关键词	DEPENDENT ECOSYSTEMS ; CLIMATE-CHANGE ; STREAM-FLOW ; SAN-PEDRO ; WATER ; RIVER ; COTTONWOODS ; VEGETATION ; POPULUS ; VULNERABILITY
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368588
作者单位	[Kibler, Christopher L.; Roberts, Dar A.] Univ Calif Santa Barbara, Dept Geog, Santa Barbara, CA 93106 USA; [Schmidt, E. Claire] Knox Coll, Dept Biol, Galesburg, IL 61401 USA; [Roberts, Dar A.; Kui, Li; Singer, Michael Bliss] Univ Calif Santa Barbara, Earth Res Inst, Santa Barbara, CA 93106 USA; [Stella, John C.] SUNY Coll Environm Sci & Forestry, Dept Sustainable Resources Management, Syracuse, NY 13210 USA; [Kui, Li; Lambert, Adam M.] Univ Calif Santa Barbara, Marine Sci Inst, Santa Barbara, CA 93106 USA; [Lambert, Adam M.] Univ Calif Santa Barbara, Cheadle Ctr Biodivers & Ecol Restorat, Santa Barbara, CA 93106 USA; [Singer, Michael Bliss] Cardiff Univ, Sch Earth & Environm Sci, Cardiff CF10 3AT, Wales; [Singer, Michael Bliss] Cardiff Univ, Water Res Inst, Cardiff CF10 3AX, Wales
推荐引用方式 GB/T 7714	Kibler, Christopher L.,Schmidt, E. Claire,Roberts, Dar A.,et al. A brown wave of riparian woodland mortality following groundwater declines during the 2012-2019 California drought[J],2021,16(8).
APA	Kibler, Christopher L..,Schmidt, E. Claire.,Roberts, Dar A..,Stella, John C..,Kui, Li.,...&Singer, Michael Bliss.(2021).A brown wave of riparian woodland mortality following groundwater declines during the 2012-2019 California drought.ENVIRONMENTAL RESEARCH LETTERS,16(8).
MLA	Kibler, Christopher L.,et al."A brown wave of riparian woodland mortality following groundwater declines during the 2012-2019 California drought".ENVIRONMENTAL RESEARCH LETTERS 16.8(2021).