干旱区生态环境知识资源中心(Arid): Local temporal trajectories explain population-level responses to climate change in saguaro (Carnegiea gigantea)

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DOI	10.1002/ecs2.2844
	Local temporal trajectories explain population-level responses to climate change in saguaro (Carnegiea gigantea)
	Rodriguez-Burmca, Susana 1,2; Winkler, Daniel E.3; Webb, Robert H.4; Venable, D. Lawrence 1
通讯作者	Winkler, Daniel E.
来源期刊	ECOSPHERE
ISSN	2150-8925
出版年	2019
卷号	10 期号:8
英文摘要	Population demography is typically assumed to be strongly influenced by climatic factors, particularly with succulent plants and cacti. The saguaro cactus (Carnegiea gigantea) is a long-lived columnar cactus of the Sonoran Desert that experiences episodic recruitment and mortality. Previous studies have attributed long-term changes in saguaro populations to climatic factors, including increased germination and establishment during wet periods and mortality and reduced establishment during droughts and extreme freezes. We used a 48-yr data set of marked individuals at the Desert Laboratory in Tucson, Arizona, to test the hypothesis that local, temporal population trajectories are mediated by topographic heterogeneity that interacts with fluctuating climatic conditions. We tested the influence of local slope and aspect vs. climatic variability on a population of saguaro using >5800 marked individuals that have been measured since 1964. We examined the relationship between demography and climatic variables (drought, precipitation, and extreme temperatures) and found significant differences in growth and survival among aspects and among census periods. Saguaro population growth was higher during wet and cool periods (e.g., 1964-1970), and changes in age structures suggest that topographic differences interact with climatic fluctuations to produce unexpected demographic patterns including large recruitment events during periods of relatively unfavorable climate conditions. Our results highlight the importance of long-term data to detect demographic responses to climate that could not be predicted from short-term studies of plant physiology and population demography.
英文关键词	Carnegiea gigantea climate change demography desert plants drought extreme temperatures mortality recruitment saguaro Sonoran desert southwest topography
类型	Article
语种	英语
国家	USA ; Colombia
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000483832300011
WOS关键词	VEGETATION CHANGE ; LONG-TERM ; SPECIES DISTRIBUTION ; COLUMNAR CACTI ; GLOBAL-CHANGE ; PLANT ; REGENERATION ; FACILITATION ; COMPETITION ; MODELS
WOS类目	Ecology
WOS研究方向	Environmental Sciences & Ecology
来源机构	University of Arizona ; United States Geological Survey
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215317
作者单位	1.Univ Arizona, Dept Ecol & Evolutionary Biol, Tucson, AZ 85721 USA; 2.Inst Invest Recursos Biol Alexander von Humboldt, Bogota, DC, Colombia; 3.US Geol Survey, Southwest Biol Sci Ctr, Moab, UT 84532 USA; 4.Univ Arizona, Sch Nat Resources, Tucson, AZ 85721 USA
推荐引用方式 GB/T 7714	Rodriguez-Burmca, Susana,Winkler, Daniel E.,Webb, Robert H.,et al. Local temporal trajectories explain population-level responses to climate change in saguaro (Carnegiea gigantea)[J]. University of Arizona, United States Geological Survey,2019,10(8).
APA	Rodriguez-Burmca, Susana,Winkler, Daniel E.,Webb, Robert H.,&Venable, D. Lawrence.(2019).Local temporal trajectories explain population-level responses to climate change in saguaro (Carnegiea gigantea).ECOSPHERE,10(8).
MLA	Rodriguez-Burmca, Susana,et al."Local temporal trajectories explain population-level responses to climate change in saguaro (Carnegiea gigantea)".ECOSPHERE 10.8(2019).