干旱区生态环境知识资源中心(Arid): Minimal mortality and rapid recovery of the dominant shrub Larrea tridentata following an extreme cold event in the northern Chihuahuan Desert

Arid

DOI	10.1111/jvs.12777
	Minimal mortality and rapid recovery of the dominant shrub Larrea tridentata following an extreme cold event in the northern Chihuahuan Desert
	Ladwig, Laura M.1,2; Collins, Scott L.1; Krofcheck, Dan J.1; Pockman, William T.1
通讯作者	Ladwig, Laura M.
来源期刊	JOURNAL OF VEGETATION SCIENCE
ISSN	1100-9233
EISSN	1654-1103
出版年	2019
卷号	30 期号:5 页码:963-972
英文摘要	Questions Woody encroachment into grasslands is a worldwide phenomenon partially influenced by climate change, including extreme weather events. Larrea tridentata is a common shrub throughout the warm deserts of North America that has encroached into grasslands over the past 150 years. Physiological measurements suggest that the northern distribution of L. tridentata is limited by cold temperatures; thus extreme winter events may slow or reverse shrub expansion. We tested this limitation by measuring the response of individual L. tridentata shrubs to an extreme winter cold (-31 degrees C) event to assess shrub mortality and rate of recovery of surviving shrubs. Location Sevilleta National Wildlife Refuge, Socorro County, New Mexico, USA. Methods Canopy dieback and recovery following an extreme cold event were measured for 869 permanently marked individual L. tridentata shrubs in grass-shrub ecotone and shrubland sites. Individual shrubs were monitored for amount of canopy dieback, rate of recovery, and seed set for three growing seasons after the freeze event. Results Shrubs rapidly suffered a nearly complete loss of canopy leaf area across all sites. Although canopy loss was high, mortality was low and 99% of shrubs resprouted during the first growing season after the freeze event. Regrowth rates were similar within ecotone and shrubland sites, even when damage by frost was larger in the latter. After three years of recovery, L. tridentata canopies had regrown on average 23-83% of the original pre-freeze canopy sizes across the sites. Conclusions We conclude that isolated extreme cold events may temporarily decrease shrubland biomass but they do not slow or reverse shrub expansion. These events are less likely to occur in the future as regional temperatures increase under climate change.
英文关键词	Chihuahuan Desert creosote bush extreme cold grass-shrubland ecotone Larrea tridentata regrowth winter
类型	Article
语种	英语
国家	USA
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000479451700001
WOS关键词	INDUCED XYLEM CAVITATION ; CLIMATE-CHANGE ; CREOSOTE BUSH ; MOISTURE AVAILABILITY ; COMMUNITY STRUCTURE ; SPATIAL-PATTERNS ; WINTER CLIMATE ; SOIL-MOISTURE ; ICE STORM ; GRASSLAND
WOS类目	Plant Sciences ; Ecology ; Forestry
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology ; Forestry
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/217406
作者单位	1.Univ New Mexico, Dept Biol, Albuquerque, NM 87131 USA; 2.Univ Wisconsin, Dept Integrat Biol, Madison, WI USA
推荐引用方式 GB/T 7714	Ladwig, Laura M.,Collins, Scott L.,Krofcheck, Dan J.,et al. Minimal mortality and rapid recovery of the dominant shrub Larrea tridentata following an extreme cold event in the northern Chihuahuan Desert[J],2019,30(5):963-972.
APA	Ladwig, Laura M.,Collins, Scott L.,Krofcheck, Dan J.,&Pockman, William T..(2019).Minimal mortality and rapid recovery of the dominant shrub Larrea tridentata following an extreme cold event in the northern Chihuahuan Desert.JOURNAL OF VEGETATION SCIENCE,30(5),963-972.
MLA	Ladwig, Laura M.,et al."Minimal mortality and rapid recovery of the dominant shrub Larrea tridentata following an extreme cold event in the northern Chihuahuan Desert".JOURNAL OF VEGETATION SCIENCE 30.5(2019):963-972.