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Identification of limiting climatic and geographical variables for the distribution of the tortoise Chelonoidis chilensis (Testudinidae): a baseline for conservation actions

Ruete, Alejandro and Leynaud, Gerardo C. (2015). Identification of limiting climatic and geographical variables for the distribution of the tortoise Chelonoidis chilensis (Testudinidae): a baseline for conservation actions. PeerJ. 3, 1-12
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Abstract

Background. Just as for most other tortoise species, the once common Chaco tortoise, Chelonoidis chilensis (Testudinidae), is under constant threat across it distribution in Argentina, Bolivia and Paraguay. Despite initial qualitative description of the species distribution and further individual reports of new locations for the species, there is no description of the species distribution in probabilistic terms. With this work we aim to produce an updated predictive distribution map for C. chilensis to serve as a baseline management tool for directed strategic conservation planning.Methods. We fitted a spatially expanded logistic regression model within the Bayesian framework that accounts for uncertainty on presence-only and generated pseudo-absence data into the parameter estimates. We contrast the results with reported data for the national networks of protected areas to assess the inclusion of the species in area-based conservation strategies.Results. We obtained maps with predictions of the occurrence of the species and reported the model's uncertainty spatially. The model suggests that potential suitable habitats for the species are continuous across Argentina, West Paraguay and South Bolivia, considering the variables, the scale and the resolution used. The main limiting variables were temperature-related variables, and precipitation in the reproductive period.Discussion. Given the alarming low density and coverage of protected areas over the distribution area of C. chilensis, the map produced provides a baseline to identify areas where directed strategic conservation management actions would be more efficient for this and other associated species.

Authors/Creators:Ruete, Alejandro and Leynaud, Gerardo C.
Title:Identification of limiting climatic and geographical variables for the distribution of the tortoise Chelonoidis chilensis (Testudinidae): a baseline for conservation actions
Series/Journal:PeerJ (2167-8359)
Year of publishing :2015
Depositing date:11 January 2016
Volume:3
Page range:1-12
Number of Pages:12
Publisher:PeerJ
Associated Programs and Other Stakeholders:SLU - Environmental assessment > Programme Biodiversity
ISSN:2167-8359
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Published version
Full Text Status:Public
Agris subject categories.:L Animal production > L20 Animal ecology
P Natural resources > P01 Nature conservation and land resources
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Other Biological Topics
Agrovoc terms:biogeography, ecology, Testudines, protected areas, biological preservation, protected areas, Argentina, Bolivia (Plurinational State of), Paraguay
Keywords:Argentina, AUC, Bayesian inference, Bolivia, Chaco tortoise, Chelonoidis chilensis, Paraguay, Presence-only data, Protected areas, Species distribution model
URN:NBN:urn:nbn:se:slu:epsilon-e-3166
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-3166
Additional ID:
Type of IDID
Web of Science (WoS)000364328700009
DOI10.7717/peerj.1298
ID Code:12928
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology
Deposited By: SLUpub Connector
Deposited On:11 Jan 2016 09:51
Metadata Last Modified:10 Feb 2016 16:27

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