title: Using Range-Wide Abundance Modeling to Identify Key Conservation Areas for the Micro-Endemic Bolson Tortoise (Gopherus flavomarginatus).
abstract: A widespread biogeographic pattern in nature is that population abundance is not uniform across the geographic range of species: most occurrence sites have relatively low numbers, whereas a few places contain orders of magnitude more individuals. The Bolson tortoise Gopherus flavomarginatus is endemic to a small region of the Chihuahuan Desert in Mexico, where habitat deterioration threatens this species with extinction. In this study we combined field burrows counts and the approach for modeling species abundance based on calculating the distance to the niche centroid to obtain range-wide abundance estimates. For the Bolson tortoise, we found a robust, negative relationship between observed burrows abundance and distance to the niche centroid, with a predictive capacity of 71%. Based on these results we identified four priority areas for the conservation of this microendemic and threatened tortoise. We conclude that this approach may be a useful approximation for identifying key areas for sampling and conservation efforts in elusive and rare species.
authors.affiliation: División de Posgrado, Instituto de Ecología, A. C., El Haya, Xalapa, Veracruz, México; Biología Evolutiva, Instituto de Ecología, A. C., El Haya, Xalapa, Veracruz, México.
authors.forename: Cinthya A
authors.initials: CA
authors.lastname: Ureña-Aranda
authors.affiliation: Biología Evolutiva, Instituto de Ecología, A. C., El Haya, Xalapa, Veracruz, México.
authors.forename: Octavio
authors.initials: O
authors.lastname: Rojas-Soto
authors.affiliation: Departamento de Zoología, Instituto de Biología, Universidad Nacional Autónoma de México, Ciudad Universitaria, Ciudad de México, México.
authors.forename: Enrique
authors.initials: E
authors.lastname: Martínez-Meyer
authors.affiliation: División de Posgrado, Instituto de Ecología, A. C., El Haya, Xalapa, Veracruz, México.
authors.forename: Carlos
authors.initials: C
authors.lastname: Yáñez-Arenas
authors.affiliation: Ecología Funcional, Instituto de Ecología, A. C., El Haya, Xalapa, Veracruz, México.
authors.forename: Rosario
authors.initials: R
authors.lastname: Landgrave Ramírez
authors.affiliation: Biología Evolutiva, Instituto de Ecología, A. C., El Haya, Xalapa, Veracruz, México.
authors.forename: Alejandro
authors.initials: A
authors.lastname: Espinosa de los Monteros
mesh_terms: D000818:Animals; D003247:Conservation of Natural Resources / Q000379:methods*; D003710:Demography; D017753:Ecosystem; D008800:Mexico; D008962:Models, Theoretical; D011156:Population Density; D014426:Turtles / Q000254:growth & development; D035501:Uncertainty