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Impact of land-use changes on red-legged partridge conservation in the Iberian Peninsula

Published online by Cambridge University Press:  18 May 2012

MIGUEL DELIBES-MATEOS ,
MIGUEL ÁNGEL FARFÁN ,
JESÚS OLIVERO  and
JUAN MARIO VARGAS
MIGUEL DELIBES-MATEOS
Affiliation:
Instituto de Investigación en Recursos Cinegéticos (IREC-CSIC-UCLM-JCCM), Ronda de Toledo s/n, 13071 Ciudad Real, Spain
MIGUEL ÁNGEL FARFÁN
Affiliation:
Departamento de Biología Animal, Facultad de Ciencias, Universidad de Málaga, 29071 Málaga, Spain Biogea Consultores, Calle Navarro Ledesma 243, 29010 Málaga, Spain
JESÚS OLIVERO
Affiliation:
Departamento de Biología Animal, Facultad de Ciencias, Universidad de Málaga, 29071 Málaga, Spain
JUAN MARIO VARGAS*
Affiliation:
Departamento de Biología Animal, Facultad de Ciencias, Universidad de Málaga, 29071 Málaga, Spain Durrell Wildlife Conservation Trust, Les Augrès Manor, Trinity, Jersey JE3 5BP, UK
*
*Correspondence: Juan Mario Vargas, Departamento de Biología Animal, Facultad de Ciencias, Universidad de Málaga, 29071 Málaga, Spain Tel: +34 952131861 Fax: +34 952131668 e-mail: [email protected]
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Summary

Red-legged partridge (Alectoris rufa) populations have significantly declined in the Iberian Peninsula (by > 50% between 1973 and 2002). This decline has been attributed to the drastic changes that have occurred in traditional agricultural landscapes, among other factors. This paper assesses the relationship between landscape change and the changes in areas favourable to partridges. The areas favourable to partridges in Andalusia (southern Spain), and the environmental and land-use factors that determined these areas, were identified for both the 1960s and the 1990s. Land-use changes were analysed both throughout the study area and for areas where favourability for partridges has either improved or worsened during recent decades. Both the location and the factors determining areas favourable to red-legged partridges have changed substantially over recent decades. In the 1960s, areas favourable to partridges were associated mainly with natural vegetation in mountainous areas, whereas, by the 1990s, favourable areas were associated with large low-lying croplands; such change may be attributable to regional land-use changes. The percentage area of the main natural vegetation variables positively correlated to partridge favourability in the 1960s model (mainly pastures and open scrubland) had decreased in areas that had become unfavourable to the species (such as mountain areas), and risen where partridge favourability increased. By the 1990s, the land area favourable to partridges had decreased by c. 10% (c. 6000 km2) in southern Spain, whereas land use unfavourable to partridges markedly increased (> 100%; an increase of c. 3000 km2). Landscape suitable for partridges has thus become severely impoverished over recent decades in the Iberian Peninsula. Management measures aimed at improving the landscape for farmland birds should be encouraged to conserve red-legged partridge populations in southern Spain.

Keywords

agriculture intensificationAlectoris rufafavourability functionhabitat lossland abandonmentSpain
Type
Papers
Information
Environmental Conservation , Volume 39 , Issue 4 , December 2012 , pp. 337 - 346
Copyright
Copyright © Foundation for Environmental Conservation 2012

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