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Title

Loss of water availability and stream biodiversity under land abandonment and climate change in a Mediterranean catchment (Olzinelles, NE Spain).

AuthorsOtero, I.; Boada, Martí; Badia, Anna; Pla, Eduard; Vayreda, Jordi; Sabaté, Santiago CSIC ORCID; Gracia, Carlos A. CSIC; Peñuelas, Josep CSIC ORCID
KeywordsWater courses
Aquatic fauna
Land-cover change
Warming
Mediterraneancatchment
Issue Date2011
PublisherElsevier
CitationLand Use Policy 28: 207-218 (2011)
AbstractIn the north rim of the Mediterranean region, where forest cover is increasing as a result of landabandonment and temperatures are rising as a result of climatechange, there is increasing interest for the effects of such changes on the runoff of water courses. This is a paramount issue for the conservation of many freshwater habitats and species. In this work we studied the effects of both an increase in forest cover after depopulation and landabandonment and an increase in temperature on the runoff of aMediterraneancatchment and on the aquatic and semi-aquatic fauna species of the stream (Olzinelles valley, NESpain). Although in our simulation no decreasing trend in runoff is detected, the monthly runoff-rainfall ratio is now 15% lower than 30 years ago, a fact that may be attributed to a drier period rather than to the small afforestation experienced by the catchment in the last decades. Other factors such as increasing temperatures, changing rainfall patterns and increasing canopy cover are discussed. The observed decrease in the water flow has caused the disappearance of white-clawed crayfish (Austropotamobius pallipes), Mediterranean barbel (Barbus meridionalis), chub (Squalius cephalus), European eel (Anguilla anguilla), and southern water vole (Arvicola sapidus). Our results suggest that in a progressively warmer climate, and especially after landabandonment processes, management of Mediterranean mountain areas should be oriented towards an appropriate distribution of agrarian and forest land-covers in terms of wateravailability. Down to the stream scale, the pools that keep water throughout the year should be conserved and extended to enhance its potential to maintain aquatic and semi-aquatic species populations.
Description12 páginas, 7 figuras, 1 tabla.
Publisher version (URL)http://dx.doi.org/10.1016/j.landusepol.2010.06.002
URIhttp://hdl.handle.net/10261/55280
DOI10.1016/j.landusepol.2010.06.002
ISSN0264-8377
Appears in Collections:(CEAB) Artículos

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