干旱区生态环境知识资源中心(Arid): Local climate adaptations in two ubiquitous Mojave Desert shrub species, Ambrosia dumosa and Larrea tridentata

Arid

DOI	10.1111/1365-2745.13747
	Local climate adaptations in two ubiquitous Mojave Desert shrub species, Ambrosia dumosa and Larrea tridentata
	Custer, Nathan A.; Schwinning, Susanne; DeFalco, Lesley A.; Esque, Todd C.
通讯作者	Schwinning, S (corresponding author), Texas State Univ, Biol Dept, San Marcos, TX 78666 USA.
来源期刊	JOURNAL OF ECOLOGY
ISSN	0022-0477
EISSN	1365-2745
出版年	2021-10
英文摘要	Widely distributed species are often locally adapted to climate gradients across their ranges. But little is known about the patterns of intraspecific adaptation in desert shrubs. We examined the questions of local adaptation in multiple populations of two common shrub species of the winter-wet Mojave Desert in North America in a multiple common garden experiment. Plants were raised in the greenhouse and transplanted at the age of 1 year. Ambrosia dumosa is a drought-deciduous low shrub and Larrea tridentata is an exceptionally long-lived evergreen. Over 4 years, we monitored growth, survivorship, leaf and reproductive cover and once measured leaf N content, delta C-13 and SLA. We hypothesized that populations of both species would be differentiated along a growth-survivorship trade-off according to homesite aridity. Both species exhibited previously undocumented population differences along gradients of winter precipitation and temperature. In general, populations from more winter-mesic regions had faster growth in more mesic gardens and lower survivorship in the most arid garden. Homesites with more variable summer precipitation had greater growth for A. dumosa populations, but lower growth for L. tridentata. Among L. tridentata populations, leaf cover correlated positively with growth and negatively with survival time. For A. dumosa populations, growth and survival could not be attributed to specific traits across gardens. However, larger transplants had generally lower growth rates and higher survival rates across gardens, except in the driest garden, where the population averages of intrinsic water use efficiency (iWUE) and stem growth rate were positively correlated. Synthesis. Two dominant species of the Mojave Desert adapted locally to variation in winter and summer precipitation and temperature. They did so in different ways, suggesting that L. tridentata mitigated the risk of hydraulic failure, while A. dumosa optimized carbon assimilation for growth.
英文关键词	climate adaptation ecological restoration fast-slow spectrum phenological plasticity reciprocal transplant experiment reproductive trade-off winter precipitation gradient
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000707927400001
WOS关键词	WATER-USE EFFICIENCY ; GREAT-BASIN ; REPRODUCTIVE ALLOCATION ; POPULATION-DYNAMICS ; HYMENOCLEA-SALSOLA ; GAS-EXCHANGE ; TRADE-OFFS ; GROWTH ; PLANTS ; TRAITS
WOS类目	Plant Sciences ; Ecology
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology
来源机构	United States Geological Survey
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/363832
作者单位	[Custer, Nathan A.; Schwinning, Susanne] Texas State Univ, Biol Dept, San Marcos, TX 78666 USA; [DeFalco, Lesley A.; Esque, Todd C.] USGS Western Ecol Res Ctr, Henderson, NV USA
推荐引用方式 GB/T 7714	Custer, Nathan A.,Schwinning, Susanne,DeFalco, Lesley A.,et al. Local climate adaptations in two ubiquitous Mojave Desert shrub species, Ambrosia dumosa and Larrea tridentata[J]. United States Geological Survey,2021.
APA	Custer, Nathan A.,Schwinning, Susanne,DeFalco, Lesley A.,&Esque, Todd C..(2021).Local climate adaptations in two ubiquitous Mojave Desert shrub species, Ambrosia dumosa and Larrea tridentata.JOURNAL OF ECOLOGY.
MLA	Custer, Nathan A.,et al."Local climate adaptations in two ubiquitous Mojave Desert shrub species, Ambrosia dumosa and Larrea tridentata".JOURNAL OF ECOLOGY (2021).