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International Institute for Geo-Information Science and Earth Observation (ITC) 2011

Fuzzy modelling to indentify areas of high conservation value for raptors : effectiveness of the network of protected areas of Andalucia, Spain.

Díaz Gómez, D.L. (Diana Lucía)

Titre : Fuzzy modelling to indentify areas of high conservation value for raptors : effectiveness of the network of protected areas of Andalucia, Spain.

Auteur : Díaz Gómez, D.L. (Diana Lucía)

Etablissement de soutenance : University of Twente International Institute for Geo-Information Science and Earth Observation (ITC)

Grade : Master of Science in Geo-Information Science and Earth Observation 2011

Résumé
Raptors in Spain face severe threats like illegal hunting and poisoning. Serious population declines of raptors have been reported in Andalucía (South of Spain) over the last decades making imperative the evaluation of the effectiveness of the network of protected areas for raptors’ conservation. In this study fuzzy modelling was used to identify gaps in the network of protected areas of Andalucía. Environmental favourability models were obtained for the raptors breeding in Andalucía. Favourability predictions were used to calculate diversity attributes (richness, rarity and vulnerability) within a fuzzy logic framework. The correlation of diversity attributes was evaluated and used to assess their surrogacy in conservation planning. Effectiveness of the network was assessed by a fuzzy degree of disprotection that reduces the uncertainty arising from the use of arbitrary thresholds and targets in gap analyses. Results showed that richness, rarity and vulnerability of raptors are positively correlated in Andalucía, and serve as surrogates of each other in conservation planning. The network of protected areas of Andalucía is effective for the protection of raptors’ diversity attributes, although it is more effective in protecting rarity and vulnerability than richness and it is not effective in protecting steppe nesting raptors. Areas where both overall richness and steppe raptors’ richness are high are proposed as conservation priorities to overcome the gaps encountered.

Mots clés : raptors, gap analysis, fuzzy modelling, degree of disprotection, steppe nesting raptors, Andalucía

Version intégrale (ITC)

Page publiée le 4 février 2018