Literaturdatenbank
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Tenza Peral, A., Ibarra, I. P., Anadón, J. D., Martínez, J., Pedreño, A., & Giménez, A. , Local extinction of wild populations of the spur-thighed tortoise in southeastern spain due to pet collection associated with exurban sprawl. Unpublished paper presented at XII Congresso Luso Espanhol de Herpetologia.
Added by: Admin (06 Jan 2014 18:23:12 UTC) |
| Resource type: Conference Paper BibTeX citation key: TenzaPeral2012 View all bibliographic details  |
Categories: General Keywords: Habitat - habitat, Schildkröten - turtles + tortoises, Südwesteuropa - South-Western Europa, Testudinidae, Testudo graeca Creators: Anadón, Giménez, Ibarra, Martínez, Pedreño, Tenza Peral Collection: XII Congresso Luso Espanhol de Herpetologia |
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| Abstract |
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Testudinidae Direct effects of exurban sprawl on wildlife (eg, habitat loss or fragmentation) are conceptually well defined and deeply studied. Exurban sprawl involves the settlement of human populations that interact with the environment. However, there have been few studies focused on the effects of the human behavior and perception towards wildlife. In this study we evaluate medium-and long-term effects of the collection of the spur-thighed tortoise (Testudo graeca) with non-commercial purposes by residents of new exurban areas within the home-range of the species in southeastern Spain. For this purpose, we built a system dynamic model using bibliographic and authors’ own data about tortoise population dynamics, the housing development dynamics, and the behavior of new residents toward this species. We simulated management scenarios, including environmental education programs and housing development control. Our results showed that, for a time horizon of 100 years, the size of housing development is a key factor determining the velocity and intensity of tortoise population decrease. Populations may become extinct due to pet collection in areas around medium to large housing developments (above 650 new houses). Low housing development (75 new houses) causes a considerable reduction of original population levels (more than 14%). Environmental education program by itself, with the aim of reducing the willingness of new residents to keep tortoises in captivity, does not seem very effective. The quality and the velocity in which the educational program is initialized are key factors determining the effectiveness of the educational program. The scenarios simulation results suggest that the integration of policies of strong development constraints and educational programs are the most effective way in reducing the impact of exurban development on tortoise populations (although the population is reduced by 7 -14% of its initial value).
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