Castaneda-Rico S.,Institute Ecologia |
Castaneda-Rico S.,Portland State University |
Castaneda-Rico S.,National Autonomous University of Mexico |
Leon-Paniagua L.,Museo de Zoologia Alfonso L. Herrera |
And 4 more authors.
Journal of Mammalogy | Year: 2011
The Jico crested-tailed mouse (Habromys simulatus) is an arboreal rodent endemic to Mexico, with only 2 known extant populations restricted to montane cloud forests in the states of Hidalgo and Oaxaca. The habitat of this species has been reduced and fragmented as a result of anthropogenic activities, isolating populations and likely decreasing their sizes. We evaluated the effects of such isolation by analyzing the genetic diversity and structure of H. simulatus using 10 microsatellite loci. DNA was obtained from 52 samples from both populations. Despite the isolated and fragmented nature of the species, we found high levels of genetic diversity (H Nei = 0.732), similar to those reported in other endangered species with fragmented distributions. Genetic differentiation was significant (F ST = 0.178) and number of migrants was negligible (NmF ST = 0.196), a result supported by an assignment test and a factorial correspondence test. Molecular analysis of variance showed that 82% of genetic variation was distributed within populations, not unexpected given that each of the individuals' genotypes was distinct. Individuals within each population were mostly unrelated. The smallest population showed evidence of genetic bottleneck. We found evidence of detrimental genetic processes such as allelic fixation, genetic drift, and inbreeding. Our results strongly suggest that each of the 2 populations is a unique genetic entity that must be considered a distinct evolutionary unit. Unfortunately, both populations are at high risk of extinction, primarily due to habitat loss and population decline. © 2011 American Society of Mammalogists.
Rojas-Soto O.R.,Institute Ecologia |
Navarro-Siguenza A.G.,Museo de Zoologia Alfonso L. Herrera |
De Los Monteros A.E.,Institute Ecologia
Bird Conservation International | Year: 2010
The taxonomic criteria used as bases for endangered species lists can affect conservation policy decisions. We emphasize that the use of different taxonomic units affects the baselines of such lists. Recent taxonomic reviews for the Mexican avifauna provided the tools for assessing this effect on a highly diverse avifauna which is currently in need of serious conservation actions. Most ornithologists have used a taxonomy based on the biological species concept (BSC) to make decisions on species limits and therefore to set them into endangered species lists. However, the application of the phylogenetic species concept (PSC) as an alternative for delimiting species, results in a different panorama of what should be protected. Our analysis shows that the current official Mexican endangered species list, BSC based, encompasses 371 birds, ranked as 277 species and 94 subspecies. The same list of protected forms changes under the phylogenetic species concept because 47 of them are not recognized as valid species, while another 28 forms merit higher levels of protection. Additionally, under this concept another 11 forms should be candidates for inclusion based on their restricted distribution. We call attention to the fact that the use of one or another species concept affects endangered species lists. Copyright © BirdLife International 2009.
Hung L.M.,Insititutue of Ecology and Biological Resources |
Robbins M.B.,University of Kansas |
Rice N.H.,Academy of Natural Sciences of Philadelphia |
Garcia-Trejo E.A.,Museo de Zoologia Alfonso L. Herrera
Forktail | Year: 2012
We documented 198 species within the Muong Nhe Nature Reserve in extreme north-western Vietnam during March-April 2011. The first Vietnam records were confirmed for three warbler species (Phylloscopidae), including the Sakhalin Leaf Warbler P. borealoides, for which there are very few records for South-East Asia. The status and distribution for a number of other species were clarified for this poorly known area of Vietnam. The Muong Nhe Nature Reserve and the contiguous Phou Dendin NPA in Laos are imperative to the continued presence of the relatively high biodiversity in this region. Not only are these reserves essential to resident species, but they are an important stopover for migrant birds.
Morrone J.J.,Museo de Zoologia Alfonso L. Herrera
Zootaxa | Year: 2015
A biogeographic regionalisation of the Andean region is proposed as a hierarchical classification of sub-regions, provinces, sub-provinces and districts. It is based on biogeographic analyses of terrestrial plant and animal taxa, and seeks to provide universality, objectivity and stability. The Andean region is currently comprised of the Central Chilean, Subantarctic and Patagonian sub-regions and the South American transition zone, 15 provinces, five sub-provinces and 81 districts. Complete synonymies and brief descriptions of the areas are provided, as well as the endemic taxa that diagnose the provinces. Copyright © 2015 Magnolia Press.
Escalante T.,Museo de Zoologia Alfonso L. Herrera |
Martinez-Meyer E.,National Autonomous University of Mexico
Tropical and Subtropical Agroecosystems | Year: 2013
The Units for the Conservation, Management and Sustainable Use of Wildlife (UMAs) are instruments of conservation and management of specific species in Mexico. UMAs represent in southeastern Mexico an important way for deer management, but they have major problems related to the monitoring of species. In this paper, we propose a methodology based on the use of a 'niche centroid approach' for estimating ecological distances to the niche centroid in order to produce distribution maps containing information on the potential relative abundance of species to evaluate the capability of UMAs to maintain populations of deers. We modeled the abundance for Mazama temama, M. pandora and Odocoileus virginianus on the state of Campeche, Mexico. Our predictions of areas with most abundance of deer coincided with reports from literature. We identified the UMAs "Ik Balam" and "Ejido Carlos Cano Cruz" as areas with high proportion of suitable environment, while UMAs "Betito y Lupita", "El Huanal", "Puh", "Refugio faunístico Jalotum", "Ría Lagartos-Ría Celestun" and "Yocol Cab Balam" have not environmental conditions adequate to maintain deer populations. Although this is a preliminary study, it can be a starting point to establish institutional standards for the management of species.
PubMed | Museo de Zoologia Alfonso L. Herrera
Type: Journal Article | Journal: Conservation biology : the journal of the Society for Conservation Biology | Year: 2010
One of the most important tools in conservation biology is information on the geographic distribution of species and the variables determining those patterns. We used maximum-entropy niche modeling to run distribution models for 222 amphibian and 371 reptile species (49% endemics and 27% threatened) for which we had 34,619 single geographic records. The planning region is in southeastern Mexico, is 20% of the countrys area, includes 80% of the countrys herpetofauna, and lacks an adequate protected-area system. We used probabilistic data to build distribution models of herpetofauna for use in prioritizing conservation areas for three target groups (all species and threatened and endemic species). The accuracy of species-distribution models was better for endemic and threatened species than it was for all species. Forty-seven percent of the region has been deforested and additional conservation areas with 13.7% to 88.6% more native vegetation (76% to 96% of the areas are outside the current protected-area system) are needed. There was overlap in 26 of the main selected areas in the conservation-area network prioritized to preserve the target groups, and for all three target groups the proportion of vegetation types needed for their conservation was constant: 30% pine and oak forests, 22% tropical evergreen forest, 17% low deciduous forest, and 8% montane cloud forests. The fact that different groups of species require the same proportion of habitat types suggests that the pine and oak forests support the highest proportion of endemic and threatened species and should therefore be given priority over other types of vegetation for inclusion in the protected areas of southeastern Mexico.