干旱区生态环境知识资源中心(Arid): Moderate disturbances and shrub protection enhance perennial grass recruitment in northern Patagonia

Arid

DOI	10.1016/j.jaridenv.2021.104479
	Moderate disturbances and shrub protection enhance perennial grass recruitment in northern Patagonia
	Leder, Cintia; Torres Robles, Silvia; Peter, Guadalupe
通讯作者	Peter, G (corresponding author), Univ Nacl Rio Negro, Sede Atlantica, CEANPa, Leloir & Don Bosco 8500, RA-8500 Viedma, 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	Herbivory and fire promote changes in vegetation patches of arid environments, and recruitment plays a key role in their maintenance. We studied seedling dynamics in seven sites with different land use histories related to grazing and fire in north-eastern Patagonian Monte, Argentina. We selected shrub patches in grazed/burned areas. On each shrub patch, we established seven microsites along an under-canopy windward/leeward transect. Seedling recruitment of perennial grasses (PGR) and annual species (ASR) were registered on each microsite. PGR was higher in sites with low-intensity disturbances, and lower in those severely disturbed or not disturbed. PGR was similar on the leeward side, suggesting that shrubs generate similar microsites for their establishment on that side whatever the surrounding disturbance. Severe disturbances promoted non-native ASR. PGR overall was low and apparently, conditions that enhanced ASR also decreased PGR. This situation leads to the replacement of a native-dominated community to one dominated by non-native AS. Our findings suggest that vegetation cover in heavily grazed sites in this semiarid region are sustained mainly by grass re-sprouting capacity, as recruitment is scarce. In contrast, sites that have a fire background and/or are ungrazed show higher PGR, especially in under-canopy microsites.
英文关键词	Seedling establishment Predominant wind Microsites Semiarid systems Land use histories
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000644974900008
WOS关键词	SEEDLING ESTABLISHMENT ; PHYTOGEOGRAPHICAL PROVINCE ; SOIL-EROSION ; FIRE ; PATTERNS ; MONTE ; DYNAMICS ; RECOVERY ; SURVIVAL ; CONSEQUENCES
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/2XILL650/368744
作者单位	[Leder, Cintia; Torres Robles, Silvia; Peter, Guadalupe] Univ Nacl Rio Negro, Sede Atlantica, CEANPa, Leloir & Don Bosco 8500, RA-8500 Viedma, Argentina; [Leder, Cintia; Peter, Guadalupe] Consejo Nacl Invest Cient & Tecn CONICET, Leloir & Don Bosco 8500, RA-8500 Viedma, Argentina
推荐引用方式 GB/T 7714	Leder, Cintia,Torres Robles, Silvia,Peter, Guadalupe. Moderate disturbances and shrub protection enhance perennial grass recruitment in northern Patagonia[J],2021,189.
APA	Leder, Cintia,Torres Robles, Silvia,&Peter, Guadalupe.(2021).Moderate disturbances and shrub protection enhance perennial grass recruitment in northern Patagonia.JOURNAL OF ARID ENVIRONMENTS,189.
MLA	Leder, Cintia,et al."Moderate disturbances and shrub protection enhance perennial grass recruitment in northern Patagonia".JOURNAL OF ARID ENVIRONMENTS 189(2021).