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Using Range-Wide Abundance Modeling to Identify Key Conservation Areas for the Micro-Endemic Bolson Tortoise (Gopherus flavomarginatus).

Ureña-Aranda CA, Rojas-Soto O, Martínez-Meyer E, Yáñez-Arenas C, Landgrave Ramírez R, Espinosa de los Monteros A - PLoS ONE (2015)

Bottom Line: 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.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.

View Article: PubMed Central - PubMed

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.

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.

No MeSH data available.


Related in: MedlinePlus

Maps showing the potential distribution and abundance of Gopherus flavomarginatus.(A) Inferred abundance for the Bolson tortoise (burrows/Km2); red dots pinpoint the sites where the abundance data for the Bolson tortoises was recorded. (B) Standard deviation of abundance.
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pone.0131452.g002: Maps showing the potential distribution and abundance of Gopherus flavomarginatus.(A) Inferred abundance for the Bolson tortoise (burrows/Km2); red dots pinpoint the sites where the abundance data for the Bolson tortoises was recorded. (B) Standard deviation of abundance.

Mentions: The potential distribution of the Bolson tortoise, inferred with the Mahalanobis distance method, match well with its known distribution [29] (Fig 2A). Most of the predicted area corresponds to flat lands. The map, however, include a few sites with steep slopes from which the species is known to be absent. Those areas, therefore, were removed from the potential distribution.


Using Range-Wide Abundance Modeling to Identify Key Conservation Areas for the Micro-Endemic Bolson Tortoise (Gopherus flavomarginatus).

Ureña-Aranda CA, Rojas-Soto O, Martínez-Meyer E, Yáñez-Arenas C, Landgrave Ramírez R, Espinosa de los Monteros A - PLoS ONE (2015)

Maps showing the potential distribution and abundance of Gopherus flavomarginatus.(A) Inferred abundance for the Bolson tortoise (burrows/Km2); red dots pinpoint the sites where the abundance data for the Bolson tortoises was recorded. (B) Standard deviation of abundance.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4482574&req=5

pone.0131452.g002: Maps showing the potential distribution and abundance of Gopherus flavomarginatus.(A) Inferred abundance for the Bolson tortoise (burrows/Km2); red dots pinpoint the sites where the abundance data for the Bolson tortoises was recorded. (B) Standard deviation of abundance.
Mentions: The potential distribution of the Bolson tortoise, inferred with the Mahalanobis distance method, match well with its known distribution [29] (Fig 2A). Most of the predicted area corresponds to flat lands. The map, however, include a few sites with steep slopes from which the species is known to be absent. Those areas, therefore, were removed from the potential distribution.

Bottom Line: 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.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.

View Article: PubMed Central - PubMed

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.

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.

No MeSH data available.


Related in: MedlinePlus