Publication: El impacto de la ganadería y la agricultura en los ecosistemas terrestres.-Grazing and soil erosion in dehesas of SW Spain
Authors
Schnabel, S. ; Gómez Gutiérrez, A. ; Lavado Contador, J.F
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Universidad de Murcia
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DOI
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info:eu-repo/semantics/other
Description
Abstract
ABSTRACT
Water erosion and its relation to livestock grazing in semi-arid to dry subhumid
Mediterranean rangelands with a disperse tree cover is analyzed, based on a variety of
studies carried out since 1990 in Extremadura, Spain. The dominant factors of sheetwash
are rainfall intensity and soil surface cover, the latter being controlled by rainfall amounts and
livestock density. The discontinuous valley bottom gullies present a complex relationship with
catchment hydrology. Giving the high temporal variability of sediment losses, the influence of
livestock on gully erosion is difficult to determine with short-term studies. Analysis of aerial
photographs (1945–2006) of the Parapuños study catchment point to an enhanced gully
activity during the last decade as a consequence of increased livestock numbers.
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