干旱区生态环境知识资源中心(Arid): Cavitation-resistant junipers cease transpiration earlier than cavitation-vulnerable oaks under summer dry conditions

Arid

DOI	10.1002/eco.2337
	Cavitation-resistant junipers cease transpiration earlier than cavitation-vulnerable oaks under summer dry conditions
	Northup, Alison P.; Keitt, Timothy H.; Farrior, Caroline E.
通讯作者	Northup, AP (corresponding author), Univ Texas Austin, Austin, TX 78712 USA.
来源期刊	ECOHYDROLOGY
ISSN	1936-0584
EISSN	1936-0592
出版年	2021-08
英文摘要	Ashe juniper (Juniperus ashei Buchholz) and escarpment live oak (Quercus fusiformis Small) are two of the most common woody species of the Edwards Plateau, an arid-to-semi-arid region of nearly 100,000 km(2) in central Texas. They have very different hydraulic strategies, yet they experienced similar mortality rates during an extreme drought in 2011. We measured J. ashei and Q. fusiformis sap flow velocities during summer dry periods of 2016 and 2017 at six micro-sites. Although these were years with more-or-less average summer conditions, both included significant dry periods. To estimate the relative rate of decrease in sap velocity for each species during the dry periods, we fit a Bayesian exponential decay model to the sap velocity time series for each tree. We found that Q. fusiformis trees were better able to maintain transpiration than J. ashei during dry periods at five micro-sites and were comparable at the sixth micro-site. We conclude that it is likely that Q. fusiformis can better maintain transpiration during dry periods than J. ashei, on average, and that in the case of these two species, greater cavitation resistance may not translate to greater drought resistance.
英文关键词	Bayesian drought resistance Juniperus Quercus sap flow transpiration trees
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000687965900001
WOS关键词	2 EVERGREEN TREES ; EDWARDS PLATEAU ; WATER RELATIONS ; CENTRAL TEXAS ; DROUGHT ; MORTALITY ; VARIABILITY ; MECHANISMS ; MANAGEMENT ; WOODLANDS
WOS类目	Ecology ; Environmental Sciences ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/362972
作者单位	[Northup, Alison P.; Keitt, Timothy H.; Farrior, Caroline E.] Univ Texas Austin, Austin, TX 78712 USA
推荐引用方式 GB/T 7714	Northup, Alison P.,Keitt, Timothy H.,Farrior, Caroline E.. Cavitation-resistant junipers cease transpiration earlier than cavitation-vulnerable oaks under summer dry conditions[J],2021.
APA	Northup, Alison P.,Keitt, Timothy H.,&Farrior, Caroline E..(2021).Cavitation-resistant junipers cease transpiration earlier than cavitation-vulnerable oaks under summer dry conditions.ECOHYDROLOGY.
MLA	Northup, Alison P.,et al."Cavitation-resistant junipers cease transpiration earlier than cavitation-vulnerable oaks under summer dry conditions".ECOHYDROLOGY (2021).