干旱区生态环境知识资源中心(Arid): Grass recruitment constraints along a grazing gradient in Patagonia: N-limitation x adult competition trade-off

Arid

DOI	10.1016/j.jaridenv.2021.104480
	Grass recruitment constraints along a grazing gradient in Patagonia: N-limitation x adult competition trade-off
	Guillermo, Garcia-Martinez; Rodolfo, Golluscio
通讯作者	Rodolfo, G (corresponding author), Univ Buenos Aires, Fac Agron, Catedra Forrajicultura, Av San Martin 4453, RA-1417 Buenos Aires, DF, Argentina.
来源期刊	JOURNAL OF ARID ENVIRONMENTS
ISSN	0140-1963
EISSN	1095-922X
出版年	2021
卷号	189
英文摘要	We explored the effect of N addition and adult canopy competition on the recruitment of lost preferred species in the Patagonian steppe, where a decelerated N cycling scenario (sensu Ritchie et al., 1998) had been previously detected. In the first experiment we demonstrated that the preferred scarce grass Bromus pictus has typical traits of Competitive species, while the dominant less preferred Pappostipa speciosa has typical traits of Stress tolerant species (sensu Grime, 1997): B. pictus showed higher maximum Relative Growth Rate, water consumption and competitive ability than P. speciosa. In the second experiment, we proved that without N addition, seedlings of the preferred species showed its maximum survival rate under moderate grazing, where adult competition is lower than under ungrazed conditions and N-limitation is lower than under intense grazing. Instead, with N addition, the survival rate of B. pictus was maximum under intense grazing, where N limitation is maximum and adult competition is minimum. These results suggest that in degraded systems subjected to a decelerating N cycling scenario, the revegetation with preferred species would require recovering soil N levels, and would be more successful in the most degraded sites, where the remnant canopy has low cover.
英文关键词	Desertification Restoration Plant-soil feedback N availability Plant strategies Grazing resistance
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000644974900003
WOS关键词	INTERSPECIFIC COMPETITION ; LITTER DECOMPOSITION ; NITROGEN DYNAMICS ; DROUGHT TOLERANCE ; LARGE HERBIVORES ; PLANT ; PRECIPITATION ; RANGELANDS ; GROWTH ; ROOT
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/2XILL650/350703
作者单位	[Guillermo, Garcia-Martinez] Inst Nacl Tecnol Agr INTA, Estn Expt Agr Esquel, Chacabuco 513, RA-9200 Esquel, Argentina; [Rodolfo, Golluscio] Univ Buenos Aires, Fac Agron, Catedra Forrajicultura, Av San Martin 4453, RA-1417 Buenos Aires, DF, Argentina; [Rodolfo, Golluscio] Univ Buenos Aires, Fac Agron, Consejo Nacl Invest Cient & Tecn, Inst Invest Fisiol & Ecol Vinculadas Agr IFEVA, Buenos Aires, DF, Argentina
推荐引用方式 GB/T 7714	Guillermo, Garcia-Martinez,Rodolfo, Golluscio. Grass recruitment constraints along a grazing gradient in Patagonia: N-limitation x adult competition trade-off[J],2021,189.
APA	Guillermo, Garcia-Martinez,&Rodolfo, Golluscio.(2021).Grass recruitment constraints along a grazing gradient in Patagonia: N-limitation x adult competition trade-off.JOURNAL OF ARID ENVIRONMENTS,189.
MLA	Guillermo, Garcia-Martinez,et al."Grass recruitment constraints along a grazing gradient in Patagonia: N-limitation x adult competition trade-off".JOURNAL OF ARID ENVIRONMENTS 189(2021).