Emerging Stress and Relative Resiliency of Giant Sequoia Groves Experiencing Multiyear Dry Periods in a Warming Climate

doi:10.1016/j.ympev.2016.11.018

	Emerging Stress and Relative Resiliency of Giant Sequoia Groves Experiencing Multiyear Dry Periods in a Warming Climate
	Su, Yanjun ; Bales, Roger C.; Ma, Qin ; Nydick, Koren 3,4; Ray, Ram L.; Li, Wenkai 5; Guo, Qinghua1,2
	2017
发表期刊	JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
ISSN	2169-8953
卷号	122 期号:11 页码:3063-3075
摘要	The relative greenness and wetness of Giant Sequoia (Sequoiadendron giganteum) groves and the surrounding Sierra Nevada, California forests were investigated using patterns in vegetation indices from Landsat imagery for the period 1985-2015. Vegetation greenness (normalized difference vegetation index) and thus forest biomass in groves increased by about 6% over that 30year period, suggesting a 10% increase in evapotranspiration. No significant change in the surrounding nongrove forest was observed. In this period, local temperature measurements showed an increase of about 2.2 degrees C. The wetness of groves (normalized difference wetness index) showed no overall long-term trend but responded to changes in annual water-year precipitation and temperature. The long-term trends of grove greenness and wetness varied by elevation, with the lower rain-snow transition elevation zone (1,700-2,100m) marking a change from an increasing trend at lower elevations to a decreasing trend at higher elevations. The 2011-2015 drought brought an unprecedented drop in grove wetness, over 5 times the 1985-2010 standard deviation, and wetness in SEGI groves dropped 50% more than in nongrove areas. Overall, the wetness and greenness of SEGI groves showed a larger response to the warming climate and drought than nongrove areas. The influence of droughts on the wetness of SEGI groves reflected effects of both the multidecadal increase in forest biomass and the effects of warmer drought-year temperatures on the evaporative demand of current grove vegetation, plus sufficient regolith water storage of rain and snowmelt to sustain that vegetation through seasonal and multiyear dry periods.
关键词	Giant Sequoia Climate change Drought Vulnerability Remote senisng
学科领域	Biochemistry & Molecular Biology ; Evolutionary Biology ; Genetics & Heredity
DOI	10.1016/j.ympev.2016.11.018
收录类别	SCI
语种	英语
WOS关键词	DIFFERENCE WATER INDEX ; SIERRA-NEVADA ; SNOW ACCUMULATION ; RADIAL GROWTH ; CALIFORNIA ; DROUGHT ; GIGANTEUM ; RESTORATION ; CONIFERS ; WILDFIRE
WOS记录号	WOS:000394200500033
出版者	AMER GEOPHYSICAL UNION
文献子类	Article
出版地	WASHINGTON
EISSN	2169-8961
资助机构	Sequoia and Kings Canyon National Parks ; National Science Foundation through Southern Sierra Critical Zone Observatory [EAR-1239521]
作者邮箱	guo.qinghua@gmail.com
引用统计	被引频次：19[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/22117
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China 2.Univ Calif, Sierra Nevada Res Inst, Merced, CA 95340 USA 3.Univ Calif, Sch Engn, Merced, CA 95340 USA 4.Sequoia Natl Pk, US Natl Pk Serv, Tulare Cty, CA USA 5.Kings Canyon Natl Pk, US Natl Pk Serv, Tulare Cty, CA USA 6.Sun Yat Sen Univ, Sch Geog & Planning, Guangdong Prov Key Lab Urbanizat & Geosimulat, Guangzhou, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Su, Yanjun,Bales, Roger C.,Ma, Qin,et al. Emerging Stress and Relative Resiliency of Giant Sequoia Groves Experiencing Multiyear Dry Periods in a Warming Climate[J]. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,2017,122(11):3063-3075.
APA	Su, Yanjun.,Bales, Roger C..,Ma, Qin.,Nydick, Koren.,Ray, Ram L..,...&Guo, Qinghua.(2017).Emerging Stress and Relative Resiliency of Giant Sequoia Groves Experiencing Multiyear Dry Periods in a Warming Climate.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,122(11),3063-3075.
MLA	Su, Yanjun,et al."Emerging Stress and Relative Resiliency of Giant Sequoia Groves Experiencing Multiyear Dry Periods in a Warming Climate".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 122.11(2017):3063-3075.

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