干旱区生态环境知识资源中心(Arid): Local-regional similarity in drylands increases during multiyear wet and dry periods and in response to extreme events

Arid

DOI	10.1002/ecs2.2939
	Local-regional similarity in drylands increases during multiyear wet and dry periods and in response to extreme events
	Petrie, M. D.1; Peters, D. P. C.2,3; Burruss, N. D.3; Ji, W.4; Savoy, H. M.3
通讯作者	Petrie, M. D.
来源期刊	ECOSPHERE
ISSN	2150-8925
出版年	2019
卷号	10 期号:12
英文摘要	Climate change is predicted to impact ecosystems through altered precipitation (PPT) regimes. In the Chihuahuan Desert, multiyear wet and dry periods and extreme PPT pulses are the most influential climatic events for vegetation. Vegetation responses are most frequently studied locally, and regional responses are often unclear. We present an approach to quantify correlation of PPT and vegetation responses (as Normalized Difference Vegetation Index [NDVI]) at the Jornada ARS-LTER site (JRN; 550 km(2) area) and the surrounding dryland region (from 0 to 500 km distance; 400,000 km(2) study area) as a way to understand regional similarity to locally observed patterns. We focused on fluctuating wet and dry years, multiyear wet or dry periods of 3-4 yr, and multiyear wet periods that contained one or more extreme high PPT pulses or extreme low rainfall. In all but extreme high PPT years, JRN PPT was highly correlated (r > 0.9) to PPT across the regional study area (0-500 km distance; high correlation from 25th to 75th percentiles) and was highly correlated across a greater PPT range subregionally (0-200 km distance; high correlation from 10th to 90th percentiles). In contrast, the statistical distribution of JRN NDVI was less similar to that of regional NDVI. Yet, local-regional NDVI similarity increased during multiyear periods to a maximum of >90% similarity for 10th-90th percentiles in a number of years. Thus, local-regional heterogeneity in PPT and vegetation responses is reduced in both multiyear wet and dry periods, with the largest changes in climatic forcing and responses during multiyear wet periods. These wet and dry events support greater similarity between local-regional PPT and vegetation response patterns. We conclude that site-based research on multiyear periods can be extended to anticipate larger regional responses, and illustrate the opportunity to enhance understanding of future PPT change through increased focus on multiyear periods.
英文关键词	Chihuahuan Desert climate precipitation Special Feature: Dynamic Deserts vegetation
类型	Article
语种	英语
国家	USA
开放获取类型	gold, Green Published
收录类别	SCI-E
WOS记录号	WOS:000510015700003
WOS关键词	CLIMATE-CHANGE ; DIE-OFF ; PRECIPITATION ; GRASSLAND ; VARIABILITY ; DROUGHT ; DYNAMICS ; WATER ; FIRE ; TELECONNECTIONS
WOS类目	Ecology
WOS研究方向	Environmental Sciences & Ecology
EI主题词	2019-12-01
来源机构	New Mexico State University
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/311185
作者单位	1.Univ Nevada, Sch Life Sci, Las Vegas, NV 89154 USA; 2.ARS, USDA, Jornada Expt Range, Las Cruces, NM USA; 3.New Mexico State Univ, Jornada Basin LTER Program, Las Cruces, NM 88003 USA; 4.New Mexico State Univ, Dept Plant & Environm Sci, Las Cruces, NM 88003 USA
推荐引用方式 GB/T 7714	Petrie, M. D.,Peters, D. P. C.,Burruss, N. D.,et al. Local-regional similarity in drylands increases during multiyear wet and dry periods and in response to extreme events[J]. New Mexico State University,2019,10(12).
APA	Petrie, M. D.,Peters, D. P. C.,Burruss, N. D.,Ji, W.,&Savoy, H. M..(2019).Local-regional similarity in drylands increases during multiyear wet and dry periods and in response to extreme events.ECOSPHERE,10(12).
MLA	Petrie, M. D.,et al."Local-regional similarity in drylands increases during multiyear wet and dry periods and in response to extreme events".ECOSPHERE 10.12(2019).