干旱区生态环境知识资源中心(Arid): Are protected populations of two globular cactus species facing a demographic explosion or just a "bonanza" year?

Arid

DOI	10.1016/j.jaridenv.2020.104192
	Are protected populations of two globular cactus species facing a demographic explosion or just a "bonanza" year?
	Antonini, Yasmine; Dirzo, Rodolfo; Quitete-Portela, Rita de Cassia
通讯作者	Antonini, Y
来源期刊	JOURNAL OF ARID ENVIRONMENTS
ISSN	0140-1963
EISSN	1095-922X
出版年	2020
卷号	179
英文摘要	Despite decades of research, controversy has emerged as to whether positive and negative interactions predictably shift with increasing environmental stress. We used projection matrices, to determine growth rate and elasticity and a LTR experiment to quantify the contribution of each matrix elements to the differences in lambda observed between sympatric and syntopic sub-populations of globular cactus species in Brazil (Discocactus placentiformis and D. pseudoinsignis). We addressed the following questions: What is the growth rate of the two species when in sympatry and syntopy? What are the relative contributions of survival, growth, and fecundity to population growth? Which life cycle stages have the highest mortality? Do demographic differences between the two species account for observed differences in sub-population sizes? Both species exhibited higher densities when in syntopy than in sympatry. Seedling establishment and survival were high, and fecundity increased as plant diameter increased. Asymptotic population growth rates were significantly greater than one. The highest elasticity values were for stasis for the later ontogenetic stage and for the growths. It seems that the protection provided by the conservation area is efficient, and that the data were collected during a "bonanza" year, with high rainfall, when all or most reproduction and/or recruitment occur.
英文关键词	Population dynamics Rock outcrops Xeric habitat Biosphere reserve Espinhaco mountain range
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000533505000001
WOS关键词	TEHUACAN VALLEY ; NEOBUXBAUMIA-TETETZO ; CACTACEAE ; DYNAMICS ; MAMMILLARIA ; LIFE ; ESTABLISHMENT ; FACILITATION ; DESERT
WOS类目	Ecology ; Environmental Sciences
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/2XILL650/324463
作者单位	[Antonini, Yasmine] Univ Fed Ouro Preto, Dept Biodiversidade Evolucao & Meio Ambiente, BR-35400000 Ouro Preto, MG, Brazil; [Antonini, Yasmine; Dirzo, Rodolfo; Quitete-Portela, Rita de Cassia] Stanford Univ, Dept Biol, Stanford, CA 94305 USA; [Quitete-Portela, Rita de Cassia] Univ Fed Rio de Janeiro, Inst Biol, Dept Ecol, BR-21941970 Rio De Janeiro, RJ, Brazil
推荐引用方式 GB/T 7714	Antonini, Yasmine,Dirzo, Rodolfo,Quitete-Portela, Rita de Cassia. Are protected populations of two globular cactus species facing a demographic explosion or just a "bonanza" year?[J],2020,179.
APA	Antonini, Yasmine,Dirzo, Rodolfo,&Quitete-Portela, Rita de Cassia.(2020).Are protected populations of two globular cactus species facing a demographic explosion or just a "bonanza" year?.JOURNAL OF ARID ENVIRONMENTS,179.
MLA	Antonini, Yasmine,et al."Are protected populations of two globular cactus species facing a demographic explosion or just a "bonanza" year?".JOURNAL OF ARID ENVIRONMENTS 179(2020).