Arid
DOI10.1016/j.catena.2016.09.002
Spatial patterns of soil resources under different land use in Prosopis woodlands of the Monte desert
Meglioli, Pablo A.1; Aranibar, Julieta N.1,2; Villagra, Pablo E.1,3; Vega Riveros, Cecilia1
通讯作者Meglioli, Pablo A.
来源期刊CATENA
ISSN0341-8162
EISSN1872-6887
出版年2017
卷号149页码:86-97
英文摘要

Changes in the spatial distribution of resources constitute an indicator of degradation of arid grazing lands. In arid and semi-arid ecosystems, the distribution of soil resources has been commonly associated with the structure and the spatial arrangements of the vegetation. Although the formation of "fertile islands" beneath vegetation patches is well documented, much less is known about the changes induced by grazing systems on the distribution of soil resources. We examine how pastoralist settlements are affecting the spatial distribution of soil resources and the soil nutrient balance in central-western woodlands of Argentina. We analyzed the distribution of soil water, chloride, nitrate, total nitrogen, and organic matter at increasing distances from livestock corrals and in undisturbed woodlands, at different soil depths. We also calculated variation indexes of soil organic matter and total nitrogen produced by livestock settlements, as an indicator of degree of deterioration or improvement of the soils. The transects located in pastoralist settlements demonstrated an increasing centripetal gradient in availability of soil water and nutrients compared to transects outside of these disturbed areas. Livestock corrals create local hotspots of nutrient enrichment, but when we analyzed the effects of livestock settlements at a higher spatial scale, we found net losses of soil organic matter and total nitrogen. We conclude that the coupling between nutrient and patch dynamics is disrupted by the pastoralist settlements, which caused a redistribution of soil resources, controlled by the location from the livestock corrals. The processes that promote nutrient losses, such as ammonium volatilization, denitrification, nitrate leaching, organic matter oxidation, manure exports, and soil erosion, are relatively higher than the extra inputs of dung and urine. Therefore, this study emphasizes the role of grazing systems as modulators of water and nutrient fluxes, and soil nutrient balance. (C) 2016 Elsevier B.V. All rights reserved.


英文关键词Grazing gradient Livestock corrals Nutrient balance Piosphere Soil resource distribution Woodland soils
类型Article
语种英语
国家Argentina
收录类别SCI-E
WOS记录号WOS:000390733300008
WOS关键词GROUNDWATER RECHARGE ; GRAZING GRADIENTS ; VEGETATION CHANGE ; PATAGONIAN MONTE ; ARID ECOSYSTEMS ; ORGANIC-MATTER ; MOJAVE DESERT ; ARGENTINA ; DYNAMICS ; HETEROGENEITY
WOS类目Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向Geology ; Agriculture ; Water Resources
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/198031
作者单位1.Consejo Nacl Invest Cient & Tecn CCT CONICET Mend, Inst Argentino Nivol Glaciol & Ciencias Ambiental, Av Ruiz Leal S-N,Parque Gen San Martin, RA-5500 Mendoza, Argentina;
2.Univ Nacl Cuyo, Fac Ciencias Exactas & Nat, Ciudad Univ,Parque Gen San Martin, RA-5500 Mendoza, Argentina;
3.Univ Nacl Cuyo, Fac Ciencias Agr, Almirante Brown 500, RA-5505 Mendoza, Argentina
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Meglioli, Pablo A.,Aranibar, Julieta N.,Villagra, Pablo E.,et al. Spatial patterns of soil resources under different land use in Prosopis woodlands of the Monte desert[J],2017,149:86-97.
APA Meglioli, Pablo A.,Aranibar, Julieta N.,Villagra, Pablo E.,&Vega Riveros, Cecilia.(2017).Spatial patterns of soil resources under different land use in Prosopis woodlands of the Monte desert.CATENA,149,86-97.
MLA Meglioli, Pablo A.,et al."Spatial patterns of soil resources under different land use in Prosopis woodlands of the Monte desert".CATENA 149(2017):86-97.
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