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Reinforcing and expanding the predictions of the disturbance vicariance hypothesis in Amazonian harlequin frogs: a molecular phylogenetic and climate envelope modelling approach

Lötters, Stefan and Van der Meijden, Arie and Rödder, Dennis and Köster, Timo E. and Kraus, Tanja and La Marca, Enrique and Haddad, Célio F.B. and Veith, Michael (2010) Reinforcing and expanding the predictions of the disturbance vicariance hypothesis in Amazonian harlequin frogs: a molecular phylogenetic and climate envelope modelling approach. Biodiversity and Conservation, 19 (8), pp. 2125-2146. Springer Verlag. DOI: DOI 10.1007/s10531-010-9869-y.

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Official URL: http://www.springerlink.com/content/0960-3115

Abstract

The disturbance vicariance hypothesis (DV) has been proposed to explain speciation in Amazonia, especially its edge regions, e.g. in eastern Guiana Shield harlequin frogs (Atelopus) which are suggested to have derived from a cool-adapted Andean ancestor. In concordance with DV predictions we studied that (i) these amphibians display a natural distribution gap in central Amazonia; (ii) east of this gap they constitute a monophyletic lineage which is nested within a pre-Andean/western clade; (iii) climate envelopes of Atelopus west and east of the distribution gap show some macroclimatic divergence due to a regional climate envelope shift; (iv) geographic distributions of climate envelopes of westernand eastern Atelopus range into central Amazonia but with limited spatial overlap. We tested if presence and apparent absence data points of Atelopus were homogenously distributed with Ripley's K function. A molecular phylogeny (mitochondrial 16S rRNA gene) was reconstructed using Maximum Likelihood and Bayesian Inference to study if Guianan Atelopus constitute a clade nested within a larger genus phylogeny. We focused on climate envelope divergence and geographic distribution by computing climatic envelope models with MaxEnt based on macroscale bioclimatic parameters and testing them by using Schoener'™s index and modified Hellinger distance. We corroborated existing DV predictions and, for the first time, formulated new DV predictions aiming on species' climate envelope change. Our results suggest that cool-adapted Andean Atelopus ancestors had dispersed into the Amazon basin and further onto the eastern Guiana Shield where, under warm conditions, they were forced to change climate envelopes.

Document Type:Article
Title:Reinforcing and expanding the predictions of the disturbance vicariance hypothesis in Amazonian harlequin frogs: a molecular phylogenetic and climate envelope modelling approach
Authors:
AuthorsInstitution or Email of Authors
Lötters, Stefanloetters@uni-trier.de
Van der Meijden, Ariefrog@arievandermeijden.nl
Rödder, Dennisroedder@uni-trier.de
Köster, Timo E.veith@uni-trier.de
Kraus, Tanjatanja.kraus@dlr.de
La Marca, EnriqueUNSPECIFIED
Haddad, Célio F.B.UNSPECIFIED
Veith, Michaelveith@uni-trier.de
Date:6 June 2010
Journal or Publication Title:Biodiversity and Conservation
Refereed publication:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:19
DOI:DOI 10.1007/s10531-010-9869-y
Page Range:pp. 2125-2146
Publisher:Springer Verlag
Status:Published
Keywords:Atelopus, Bayesian inference, Bioclimate, MaxEnt, Maximum likelihood, Ripley’s K function, South America
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben Geowissenschaftl. Fernerkundungs- und GIS-Verfahren (old)
Location: Oberpfaffenhofen
Institutes and Institutions:German Remote Sensing Data Center
Deposited By: Dr. Tanja Kraus
Deposited On:04 Oct 2010 12:49
Last Modified:19 Apr 2013 11:19

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