Literaturdatenbank
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Tzankov, N. D., & Popgeorgiev, G. , Present situation and conservation measures for hermann’s (testudo hermanni boettgeri mojsisovics, 1889) and spur-thighed (testudo graeca ibera pallas, 1814) tortoises in bulgaria. Unpublished paper presented at Atelier international sur la gestion et la restauration des populations et habitats de la Tortue d’Hermann / International workshop on the management and restoration of Hermann’s tortoise populations and habitats.
Added by: Admin (06 Jan 2014 18:25:26 UTC) |
| Resource type: Conference Paper BibTeX citation key: Tzankov2013 View all bibliographic details  |
Categories: General Keywords: Habitat - habitat, Schildkröten - turtles + tortoises, Südosteuropa - South-Eastern Europe, Testudinidae, Testudo graeca, Testudo hermanni Creators: Popgeorgiev, Tzankov Collection: Atelier international sur la gestion et la restauration des populations et habitats de la Tortue d’Hermann / International workshop on the management and restoration of Hermann’s tortoise populations and habitats |
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| Abstract |
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Testudo hermanni graeca Testudinidae The situation with the tortoises in Bulgaria follows the trends established thirty years ago. Testudo hermanni boettgeri is a relatively widespread species found in 2 584 locations in 83 Natura 2000 sites based on data from mapping campaign during the last two years. Alarming fact is that the species was not found in more than 50 % of the expected sites. Testudo graeca have 1 313 locations in 25 sites that is only 16 % of what we expected. Habitats at the location point and threats if present were stated for every single specimen. Abundance was also stated (number of specimens per 1 km track). A higher abundance scores in Testudo hermanni and Testudo graeca were obtained respectively in the Continental and the Black sea biogeographic regions, approximately ten times higher than those from the Alpine region for both species. We ran spatial distribution models (SDMs) and compared the predicted distribution areas falling inside and outside of the existing protected sites. The SDMs model for Testudo hermanni revealed that 67% of the territories with low suitability, 47% of the territories with medium suitability, and 36% of the optimal territories fall outside of the sites. Generally, most of the suitable territories are outside the protected sites (59%). Our results reinforce the question about the network efficiency and allude that it might be correct to expand the network so that a higher percentage of suitable are indeed protected. At least, connectivity between sites has to be ensured.
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