干旱区生态环境知识资源中心(Arid): How does grazing affect soil water availability in the Patagonian steppe?

Arid

DOI	10.1016/j.jaridenv.2022.104800
	How does grazing affect soil water availability in the Patagonian steppe?
	Golluscio, R. A.; Garcia Martinez, G.; Cavagnaro, F. P.
通讯作者	Golluscio, RA
来源期刊	JOURNAL OF ARID ENVIRONMENTS
ISSN	0140-1963
EISSN	1095-922X
出版年	2022
卷号	205
英文摘要	In the Patagonian steppe, grazing may or may not reduce soil water availability: it may increase evaporative losses, because it reduces plant cover, but may decrease transpiration losses because it decreases plant biomass. Therefore, grazing could reduce soil water availability in the superficial layer, mostly affected by evaporation, but could increase it in the subsurface layers, mostly affected by transpiration. Our hypothesis is that such effects would be most evident in the bare soil spaces, with higher evaporative losses and lower root density than vegetated microsites. Therefore, we analyzed the proportion of four microsites (shrubs, bare soil, preferred- and unpreferred grasses), and their soil water availability at 0-5 and 5-15 cm depth in four sampling areas, each one with an ungrazed, a moderately- and an intensely-grazed site. Our results supported the initial hypothesis: bare soil microsites had the lowest surface, but the highest subsurface water availability. However, grazing did not cause any change in the mean soil water availability (net effect) because it did not affect soil water availability in any microsite and depth (direct effects), and only caused a replacement of preferred-by unpreferred grasses (indirect effects), two groups that induced small differences in water availability.
英文关键词	Microsites Direct effects Indirect effects Net effect Revegetation Desertification
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000877503900002
WOS关键词	ROOTING DEPTH ; MANAGEMENT ; GRASSLAND ; GRASSES ; SEEDLINGS ; IMPACT ; SHRUBS ; CARBON
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/2XILL650/393305
推荐引用方式 GB/T 7714	Golluscio, R. A.,Garcia Martinez, G.,Cavagnaro, F. P.. How does grazing affect soil water availability in the Patagonian steppe?[J],2022,205.
APA	Golluscio, R. A.,Garcia Martinez, G.,&Cavagnaro, F. P..(2022).How does grazing affect soil water availability in the Patagonian steppe?.JOURNAL OF ARID ENVIRONMENTS,205.
MLA	Golluscio, R. A.,et al."How does grazing affect soil water availability in the Patagonian steppe?".JOURNAL OF ARID ENVIRONMENTS 205(2022).