Literaturdatenbank
Literaturdatenbank |
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Alvarado-Díaz, J., Suazo-Ortuño, I., Wilson, L. D., & Medina-Aguilar, O. (2013). Patterns of physiographic distribution and conservation status of the herpetofauna of michoacán, mexico. Amphibian & Reptile Conservation, 7(1), 128–170.
Added by: Admin (06 Jan 2014 18:23:58 UTC) |
| Resource type: Journal Article BibTeX citation key: AlvaradoDaz2013 View all bibliographic details  |
Categories: General Keywords: Geoemydidae, Habitat - habitat, Kinosternidae, Kinosternon hirtipes, Kinosternon integrum, Nordamerika - North America, Rhinoclemmys pulcherrima, Rhinoclemmys rubida, Schildkröten - turtles + tortoises, Systematik - taxonomy Creators: Alvarado-Díaz, Medina-Aguilar, Suazo-Ortuño, Wilson Collection: Amphibian & Reptile Conservation |
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| Abstract |
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At their respective levels, the country of Mexico and the state of Michoacán are major centers of herpetofaunal diversity and endemicity. Three of us (JAD, ISO, OMA) conducted extensive fieldwork in Michoacán from 1998 to 2011, and recorded 169 herpetofaunal species. With additional species reported in the literature and specimens available in scientific collections, the number of species in Michoacán has grown to 215. We examined the distribution of these species within the framework of the five physiographic provinces within the state, i.e., the Coastal Plain, the Sierra Madre del Sur, the Balsas-Tepalcatepec Depression, the Transverse Volcanic Axis, and the Central Plateau, which briefly are characterized geomorphologically and climatically. The herpetofauna consists of 54 amphibians and 161 reptiles (17.5% of the total for Mexico), classified in 38 families and 96 genera. Almost one-half of Michoacán’s herpetofaunal species occur in a single physiographic province, and the percentage of species decreases with an increase in the number of provinces. The province with the most species is the Sierra Madre del Sur, with slightly fewer numbers in the Balsas-Tepalcatepec Depression and the Transverse Volcanic Axis. An intermediate number is found in the Coastal Plain, and the lowest in the Central Plateau province. We constructed a Coefficient of Biogeographic Resemblance matrix and found the greatest degree of herpetofaunal resemblance between the Balsas-Tepalcatepec Depression and the Sierra Madre del Sur. The greatest resemblance of the Coastal Plain herpetofauna is to that of Balsas-Tepalcatepec Depression, that of the Transverse Volcanic Axis to that of the Central Plateau, and vice versa. Of the species limited to one physiographic province, 47 occur only in the Transverse Volcanic Axis, 23 in the Coastal Plain, 15 in the Balsas-Tepalcatepec, 14 in the Sierra Madre del Sur, and one in the Central Plateau. We employed three systems for determining the conservation status of the herpetofauna of Michoacán: SEMARNAT, IUCN, and EVS. Almost one-half of the species in the state are not assessed by the SEMARNAT system, with the remainder allocated to the Endangered (four species), Threatened (31), and Special Protection (79) categories. The IUCN system provides an assessment for 184 of the 212 native species, allocating them to the Critically Endangered (five species), Endangered (10), Vulnerable (12), Near Threatened (four), Least Concern (127), and Data Deficient (26) categories. The EVS system provides a numerical assessment for all of the native non-marine species (four marine species occur in the state), with the values ranging from three to 19. The resulting 208 species were placed in low, medium, and high categories of vulnerability, as follows: low (17 amphibians, 39 reptiles); medium (23 amphibians, 45 reptiles); and high (13 amphibians, 71 reptiles). The EVS system is the only one that provides an assessment for all the species (except for the four marine taxa), as well as the only one that considers the distributional status of Michoacán’s herpetofauna (state-level endemic, country-level endemic, and non-endemic). Furthermore, the values indicate that ca. 40% of the state’s herpetofauna is categorized at the highest level of environmental vulnerability. Based on these conclusions, we provide recommendations for protecting Michoacán’s herpetofauna in perpetuity. Rhinoclemmys pulcherrima rubida Kinosternon hirtipes integrum
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