干旱区生态环境知识资源中心(Arid): Climate modulates grazing effects on primary productivity of arid ecosystems in Argentina

Arid

DOI	10.7818/ECOS.2228
	Climate modulates grazing effects on primary productivity of arid ecosystems in Argentina
	Alejandra Calvo, Dianela; Peter, Guadalupe; Jose Gaitan, Juan
通讯作者	Calvo, DA (corresponding author)，Univ Nacl Rio Negro, Sede Atlantica, Ctr Estudios Ambientales NorPatagonia CEANPa, Viedma, Rio Negro, Argentina. ; Calvo, DA (corresponding author)，Consejo Nacl Invest Cient & Tecn CONICET, Buenos Aires, DF, Argentina.
来源期刊	ECOSISTEMAS
ISSN	1697-2473
出版年	2021
卷号	30 期号:3
英文摘要	The introduction of artificial water sources for livestock uses in ecosystems where water has been absent during their evolution has caused changes in vegetation. It has been proven that there is a radial mitigation of grazing impact with the distance between the water sources, which encourages the formation of piospheres. In Argentina, there are no studies that evaluate how climate acts as a modulator of the effects of grazing in piospheres along environmental gradients. The objective of this study was to evaluate and analyze the role that climate plays as a modulator of effects that grazing induces on a local scale. This would allow us to understand how the climate acts on the effects of grazing. For that, 77 piospheres were selected along a climatic gradient that covers arid and semi-arid areas of Argentina and the spatial variability of the NDVI (Normalized Difference Vegetation Index) values in the grazing gradient were analyzed as well as its relationship with mean annual precipitation and mean annual temperature. Two different patterns of NDVI response were observed within the grazing gradient. Pattern 1 presented an increase in NDVI with distance to the water point, while pattern 2 showed a reverse effect. The piospheres of patterns 1 and 2 were located above and below 280 mm of annual precipitation and 14.5 degrees C of mean annual temperature, respectively. These results suggest that there is a differential effect of grazing on vegetation, and that this effect is modulated by climatic variables.
英文关键词	desertification drylands grazing pressure piosphere shrub encroachment
类型	Article
语种	西班牙语
开放获取类型	gold
收录类别	ESCI
WOS记录号	WOS:000736978200006
WOS关键词	PATAGONIAN MONTE ; NORTHEASTERN PATAGONIA ; LAND DEGRADATION ; VEGETATION ; SHRUBLANDS ; DESERT ; SOIL ; ENCROACHMENT ; DYNAMICS ; PATTERNS
WOS类目	Ecology
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/2XILL650/376088
作者单位	[Alejandra Calvo, Dianela; Peter, Guadalupe] Univ Nacl Rio Negro, Sede Atlantica, Ctr Estudios Ambientales NorPatagonia CEANPa, Viedma, Rio Negro, Argentina; [Alejandra Calvo, Dianela; Peter, Guadalupe; Jose Gaitan, Juan] Consejo Nacl Invest Cient & Tecn CONICET, Buenos Aires, DF, Argentina; [Jose Gaitan, Juan] Inst Nacl Tecnol Agr INTA, Inst Suelos, Buenos Aires, DF, Argentina; [Jose Gaitan, Juan] Univ Nacl Lujan UNLu, Lujan, Buenos Aires, Argentina
推荐引用方式 GB/T 7714	Alejandra Calvo, Dianela,Peter, Guadalupe,Jose Gaitan, Juan. Climate modulates grazing effects on primary productivity of arid ecosystems in Argentina[J],2021,30(3).
APA	Alejandra Calvo, Dianela,Peter, Guadalupe,&Jose Gaitan, Juan.(2021).Climate modulates grazing effects on primary productivity of arid ecosystems in Argentina.ECOSISTEMAS,30(3).
MLA	Alejandra Calvo, Dianela,et al."Climate modulates grazing effects on primary productivity of arid ecosystems in Argentina".ECOSISTEMAS 30.3(2021).