Détail de l'auteur
Auteur J. Martínez-Valderrama |
Documents disponibles écrits par cet auteur (5)

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We explored the relative importance of climate oscillations and human-driven disturbances on the change in vegetation biomass in agroecosystems, and whether it is associated with land use. Our main contribution is a quantitative treatment of the[...]![]()
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The latest world atlas of desertification represents a turning point in the diagnosis of desertification. While it forgoes desertification mapping due to the intrinsic complexity of the phenomenon and the impossibility of measuring it using a si[...]![]()
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Food systems are driven by incentives that often lead to food being discarded before entering the market and to the degradation of natural resources. Vegetable production in the water-scarce province of Almería, Spain, illustrates this and highl[...]![]()
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J. Martínez-Valderrama ; J. Ibáñez ; G. del Barrio ; F.J. Alcalá ; M.E. Sanjuán ; A. Ruiz ; A. Hirche ; J. Puigdefabregas |This work illustrates the application of a simulation model to analyse how swiftly large-scale land-use changes can drive broad territories to collapse. In this sense, the economic needs of a population should not clash with the natural environm[...]![]()
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G. del Barrio ; M.E. Sanjuán ; A. Hirche ; M. Yassin ; A. Ruiz ; M. Ouessar ; J. Martínez-Valderrama ; B. Essifi ; J. Puigdefabregas |States of ecological maturity and temporal trends of drylands in Morocco, Algeria and Tunisia north of 28°N are reported for 19982008. The input data were Normalized Difference Vegetation Index databases and corresponding climate fields, at a s[...]