Literaturdatenbank
Literaturdatenbank |
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Walker, R. C. J., Gardner, C. J., Rafeliarisoa, T. H., Smith, I., Razafimanatsoa, R., & Louis, E. E. (2013). Conservation of the madagascar spider tortoise (pyxis arachnoides) amid changing land use policy: Assessing the spatial coincidence of relict populations with protected areas and mining concessions. In C. M. Castellano, A. G. J. Rhodin, M. Ogle, R. A. Mittermeier, H. Randriamahazo, R. Hudson & R. E. Lewis (Eds.), Turtles on the Brink in Madagascar: Proceedings of Two Workshops on the Status, Conservation, and Biology of Malagasy Tortoises and Freshwater Turtles Vol. 6, (pp. 135–145).Chelonian Research Foundation.
Added by: Sarina Wunderlich (06 Jul 2014 16:17:28 UTC) |
| Resource type: Book Article DOI: 10.3854/crm.6.a23p135 BibTeX citation key: Walker2013a View all bibliographic details  |
Categories: General Keywords: Geochelone elegans, Habitat - habitat, Madagaskar - Madagascar, Schildkröten - turtles + tortoises, Testudinidae Creators: Castellano, Gardner, Hudson, Lewis, Louis, Mittermeier, Ogle, Rafeliarisoa, Randriamahazo, Razafimanatsoa, Rhodin, Smith, Walker Publisher: Chelonian Research Foundation Collection: Turtles on the Brink in Madagascar: Proceedings of Two Workshops on the Status, Conservation, and Biology of Malagasy Tortoises and Freshwater Turtles |
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| Abstract |
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Testudinidae Understanding the spatial distribution of any endangered species threatened by anthropogenic drivers is important if effective management is to be employed. Here we present the results of a comprehensive range survey of the Madagascar Spider Tortoise, Pyxis arachnoides, with resulting species’ spatial area of occupancy data applied to a GIS database containing layers detailing:. 1) the distribution of current and proposed protected areas within the species range; and 2) sites that have been proposed or are under consideration for commercial mineral extraction activities within the species’ area of occupancy in southwest Madagascar. The species is geographically divided into three subspecies, in addition to two newly discovered populations of intergrades. Results show that the species’ current area of occupancy is only 29% of the historical suspected extent of occurrence. Of the 2,463 km2 of remaining area of occupancy, 74% occurs within existing or proposed protected areas (PAs). However, it would be naïve to assume that most of these tortoises will receive complete protection under this management regime from the habitat destruction and poaching that currently threatens the species. Nine of the 12 PAs are classified as IUCN Category III, V, or VI multiple-use PAs that are co-managed by local community associations, and four of these areas are to yet attract promoters for PAs establishments, thus making the threats difficult to manage under this more flexible management structure. We propose that strong mitigation strategies be devised for the 18% of the populations potentially threatened by mineral extraction. Despite this initial bleak outlook for the species, allowing for the fact that most areas that support tortoise populations are now managed, or under tenureship in some way, makes a more coordinated response easier to implement.
Added by: Sarina Wunderlich |