Literaturdatenbank
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Segurado, P., & Araújo, A. P. R. (2004). Coexistence of emys orbicularis and mauremys leprosa in portugal at two spatial scales: is there evidence of spatial segregation? Biologia (Bratislava), 59, 61–72.
Added by: Sarina Wunderlich (30 Oct 2011 14:52:42 UTC) |
| Resource type: Journal Article BibTeX citation key: Segurado2004 View all bibliographic details  |
Categories: General Keywords: Emydidae, Emys, Emys orbicularis, Geoemydidae, Habitat = habitat, Mauremys, Mauremys leprosa, Schildkröten = turtles + tortoises, Südwesteuropa = South-Western Europa Creators: Araújo, Segurado Collection: Biologia (Bratislava) |
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| Abstract |
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In the Iberian peninsula the western limit of the geographic range of Emys orbicularis overlaps with the northern limit of that of Mauremys leprosa. Given their distinct distributions, which probably reflect distinct ecological adaptations, some geographic segregation is expected between these species in the Iberian peninsula. Coexistence patterns of both species in Portugal were analyzed at biogeographic and habitat scales. Occurrences were related to environmental variables using predictive modelling procedures and a Geographic Information System (GIS), in order to compare the species in their response to environment. At the habitat scale, E. orbicularis occurrences were related to the abundance of M. leprosa estimated through visual surveys of 200 m transects along streams. Some of the most important variables affecting species presence at the two spatial scales studied were common to both species. At both scales, there is a positive correlation for the two species in the modelled probabilities of occurrence. At the biogeographic scale, the highest probabilities of occurrence were predicted for both species for the southeast of the country. At the habitat scale, E. orbicularis tends to occupy sites where M. leprosa is more abundant. No marked spatial segregation between E. orbicularis and M. leprosa seems to occur in Portugal, at least regarding the scales analyzed in this study.
Added by: Sarina Wunderlich |