干旱区生态环境知识资源中心(Arid): Growth and demography of a declining, endangered cactus in the Sonoran Desert

Arid

DOI	10.1111/1442-1984.12251
	Growth and demography of a declining, endangered cactus in the Sonoran Desert
	McIntosh, Margrit E.1; Boyd, Amy E.2; Arnold, A. Elizabeth 3,4; Steidl, Robert J.5; McDade, Lucinda A.6
通讯作者	McIntosh, Margrit E.
来源期刊	PLANT SPECIES BIOLOGY
ISSN	0913-557X
EISSN	1442-1984
出版年	2020
卷号	35 期号:1 页码:6-15
英文摘要	Increases in the incidence and severity of drought threaten the viability of rare plants in arid regions. The endangered Nichol's Turk's head cactus (Echinocactus horizonthalonius Lemaire var. nicholii L. Benson) occurs only in four small, isolated populations in the Sonoran Desert of North America. Since 1995 we have monitored a population in southeastern Arizona (USA). Here we report 23 years of observations on abundance, growth, mortality, flowering and recruitment. Abundance of plants decreased from 132 in 1996 to 40 in 2017, with 100 individuals recruited and 203 dying during the study. Individual plants grew slowly, increasing annually by an average of 0.22 cm (95% confidence interval, 0.18-0.26 cm) in diameter and 0.27 cm (0.20-0.33 cm) in height. Growth was slowest when drought was most severe and slowed as plants reached maximum size. Annual mortality increased markedly across the study period and did not vary with plant size. Annual probability of flowering increased as plants increased in diameter but not in height, and varied with precipitation and drought but not with mean annual temperature. Recruitment was higher when average temperature was higher and the number of recruits per capita increased across the study period. The annual rate of change in abundance averaged -6%, but shifted markedly from -1% during 1995-2008 to -11% during 2008-2017. Our results indicate that the population's decline was not a consequence of failed recruitment but of increased mortality, which we discuss in the context of climate and herbivory.
英文关键词	Cactaceae climate demography Endangered Species Act herbivory
类型	Article
语种	英语
国家	USA
收录类别	SCI-E
WOS记录号	WOS:000491769100001
WOS关键词	POPULATION-DYNAMICS ; CLIMATE-CHANGE ; LONG-TERM ; CACTACEAE ; RAINFALL ; TRENDS
WOS类目	Plant Sciences ; Ecology
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology
EI主题词	2019-10-22
来源机构	University of Arizona
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310325
作者单位	1.Univ Arizona, BioCommun, Tucson, AZ USA; 2.Warren Wilson Coll, Dept Biol, Asheville, NC USA; 3.Univ Arizona, Sch Plant Sci, Tucson, AZ USA; 4.Univ Arizona, Dept Ecol & Evolutionary Biol, Tucson, AZ USA; 5.Univ Arizona, Sch Nat Resources & Environm, Tucson, AZ USA; 6.Rancho Santa Ana Bot Garden, Claremont, CA USA
推荐引用方式 GB/T 7714	McIntosh, Margrit E.,Boyd, Amy E.,Arnold, A. Elizabeth,et al. Growth and demography of a declining, endangered cactus in the Sonoran Desert[J]. University of Arizona,2020,35(1):6-15.
APA	McIntosh, Margrit E.,Boyd, Amy E.,Arnold, A. Elizabeth,Steidl, Robert J.,&McDade, Lucinda A..(2020).Growth and demography of a declining, endangered cactus in the Sonoran Desert.PLANT SPECIES BIOLOGY,35(1),6-15.
MLA	McIntosh, Margrit E.,et al."Growth and demography of a declining, endangered cactus in the Sonoran Desert".PLANT SPECIES BIOLOGY 35.1(2020):6-15.