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Environmental Factors Controlling Soil Organic Carbon Stocks in Two Contrasting Mediterranean Climatic Areas of Southern Spain

AutorWillaarts, Bárbara A.; Oyonarte, Cecilio; Muñoz-Rojas, Miriam; Ibáñez, J. J. ; Aguilera, Pedro A.
Fecha de publicaciónabr-2016
EditorJohn Wiley & Sons
CitaciónLand Degradation and Development 27(3): 603-611 (2016)
ResumenManaging soil carbon requires accurate estimates of soil organic carbon (SOC) stocks and its dynamics, at scales able to capture the influence of local factors on the carbon pool. This paper develops a spatially explicit methodology to quantify SOC stocks in two contrasting regions of Southern Spain: Sierra Norte de Sevilla (SN) and Cabo de Gata (CG). Also, it examines the relationship between SOC stocks and local environmental factors. Results showed that mean SOC stocks were 4·3kgm in SN and 3·0kgm in CG. Differences in SOC in both sites were not significant, suggesting that factors other than climate have a greater influence on SOC stocks. A correlation matrix revealed that SOC has the highest positive correlation with clay content and soil depth. Based on the land use, the largest SOC stocks were found in grassland soils (4·4kgm in CG and 5·0kgm in SN) and extensive crops (3·0kgm in CG and 5·0kgm in SN), and the smallest under shrubs (2·8kgm in CG and 3·2kgm in SN) and forests soils (4·2kgm in SN). This SOC distribution is explained by the greatest soil depth under agricultural land uses, a common situation across the Mediterranean, where the deepest soils have been cultivated and natural vegetation mostly remains along the marginal sites. Accordingly, strategies to manage SOC stocks in southern Spain will have to acknowledge its high pedodiversity and long history of land use, refusing the adoption of standard global strategies.
Versión del editorhttps://doi.org/10.1002/ldr.2417
URIhttp://hdl.handle.net/10261/141119
DOI10.1002/ldr.2417
Identificadoresissn: 1099-145X
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