干旱区生态环境知识资源中心(Arid): Persistence and turnover in desert plant communities during a 37-yr period of land use and climate change

Arid

DOI	10.1002/ecm.1390
	Persistence and turnover in desert plant communities during a 37-yr period of land use and climate change
	Abella, Scott R.1; Guida, Ross J.2; Roberts, Chris L.3; Norman, Carrie M.3; Holland, James S.3
通讯作者	Abella, Scott R.
来源期刊	ECOLOGICAL MONOGRAPHS
ISSN	0012-9615
EISSN	1557-7015
出版年	2019
卷号	89 期号:4
英文摘要	Understanding long-term changes in ecological communities during global change is a priority for 21st-century ecology. Deserts, already at climatic extremes, are of unique interest because they are projected to be ecosystems most responsive to global change. Within a 500-km(2) landscape in the Mojave Desert, USA, we measured perennial plant communities at 100 sites three times (1979, 2008, and 2016) during 37 yr to evaluate six hypotheses of community change. These hypotheses encompassed shifts in community measures (e.g., diversity, cover) and species elevational distributions, biotic homogenization, disproportionately large change at the highest elevations, relationships between turnover and species' responses to disturbance and drought, and that environmental refugia (e.g., moist topographic positions) would receive species during climatic warming and drying. Most community measures changed temporally, such as species density (species/600 m(2)) increasing 23% and plant cover doubling between 1979 and 2016. There was no increase in nonnative species and minimal evidence for biotic homogenization. High-elevation communities did not display greater change than low-elevation communities. Moreover, environmental refugia factored little in species shifts. While species distributional changes were unrelated to affinity for disturbance, the six most persistent species (persisting on >80% of sites) were long-lived shrubs not associated with disturbance. Overall, seemingly paradoxically, climatic warming and drying was associated with increasing plant abundance. Comparing the 1970s to 2007-2016, precipitation in the study area declined 16% from 17 to 14 cm/yr and average daily minimum temperature rose 13% (1.2 degrees C). The current climate with fewer freezes, together with reduced grazing, could be among the most optimal for desert perennials in the past century, although potential response lags to continuing warming and drying are uncertain. This study of long-term elevational shifts in communities during global change is among few in deserts, and the average upward elevational shift of 6 m/decade for species in our study is within the range reported for temperate biomes. However, the 41% of species moving downslope is unusually high. We propose that dynamics within desert perennial communities follow a core-transient species model where a site's species are either highly persistent or transient in approximately equal proportions.
英文关键词	biotic homogenization core-transient model elevation Mojave Desert range shift refugia resistance species distribution stability
类型	Article
语种	英语
国家	USA
开放获取类型	Green Published
收录类别	SCI-E
WOS记录号	WOS:000482692500001
WOS关键词	MOJAVE DESERT ; LONG-TERM ; BIOTIC HOMOGENIZATION ; VEGETATION CHANGE ; VASCULAR PLANTS ; CHANGE IMPACTS ; CREOSOTE-BUSH ; FOREST CHANGE ; RANGE SHIFTS ; DYNAMICS
WOS类目	Ecology
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215228
作者单位	1.Univ Nevada, Sch Life Sci, Las Vegas, NV 89154 USA; 2.Sam Houston State Univ Huntsville, Dept Geog & Geol, Huntsville, TX 77431 USA; 3.Natl Pk Serv, Lake Mead Natl Recreat Area, 601 Nevada Way, Boulder City, NV 89005 USA
推荐引用方式 GB/T 7714	Abella, Scott R.,Guida, Ross J.,Roberts, Chris L.,et al. Persistence and turnover in desert plant communities during a 37-yr period of land use and climate change[J],2019,89(4).
APA	Abella, Scott R.,Guida, Ross J.,Roberts, Chris L.,Norman, Carrie M.,&Holland, James S..(2019).Persistence and turnover in desert plant communities during a 37-yr period of land use and climate change.ECOLOGICAL MONOGRAPHS,89(4).
MLA	Abella, Scott R.,et al."Persistence and turnover in desert plant communities during a 37-yr period of land use and climate change".ECOLOGICAL MONOGRAPHS 89.4(2019).