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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Recurrent connections between Amazon and Atlantic forests shaped diversity in Caatinga four-eyed frogs

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Thome, Maria Tereza C. [1] ; Sequeira, Fernando [2] ; Brusquetti, Francisco [1, 3] ; Carstens, Bryan [4] ; Haddad, Celio F. B. [1] ; Rodrigues, Miguel Trefaut [5] ; Alexandrino, Joao [6]
Total Authors: 7
[1] UNESP Univ Estadual Paulista, Inst Biociencias, Dept Zool, Campus Rio Claro, Rio Claro - Brazil
[2] Univ Porto, Ctr Invest Biodiversidade & Recursos Genet, CIBIO InBIO, P-4485661 Vairao - Portugal
[3] Inst Invest Biol Paraguay, Asuncion 1409 - Paraguay
[4] Ohio State Univ, Dept Evolut Ecol & Organismal Biol, Columbus, OH 43210 - USA
[5] Univ Sao Paulo, Inst Biociencias, Dept Zool, BR-09500900 Sao Paulo - Brazil
[6] UNIFESP Univ Fed Sao Paulo, Dept Ciencias Biol, Diadema - Brazil
Total Affiliations: 6
Document type: Journal article
Source: Journal of Biogeography; v. 43, n. 5, p. 1045-1056, MAY 2016.
Web of Science Citations: 18

Aim The Caatinga is a widespread but poorly known biome in South America. Its historical stability is controversial and different types of evidence provide support to contrasting hypotheses. We investigate how past biome dynamics may have caused diversification in the endemic four-eyed frog genus Pleurodema. Location Caatinga biome. Methods We sampled 353 individuals of Pleurodema alium and Pleurodema diplolister from 60 localities and genotyped them at 12 (P. alium) or 20 (P. diplolister) microsatellite loci. We sequenced a mitochondrial fragment for a subset (199) of the samples. After exploratory analyses to infer genetic structure between and within species, we designed seven biogeographical scenarios based on the literature on species distributions, palaeomodels and geological palaeoindicators. We tested these hypotheses by calculating the posterior probability of models using multilocus approximate Bayesian computation (ABC). Results Both markers recovered well-defined interspecific limits with restricted introgression, but population structure within P. diplolister is subtle and affected by isolation by distance. Model selection using ABC supported two scenarios of diversification that included recent demographic growth. Genetic breaks at intra-and interspecific levels were geographically coincident, and correlated with past forest invasions reported in the literature. Main conclusions Our data support the idea that past expansions of the Amazon and Atlantic forests over the current Caatinga distribution shaped the genetic structure in endemic four-eyed frogs at more than one level by promoting intermittent vicariance. Additional support comes from the distribution patterns of forest and Caatinga taxa. Variation among groups suggests differential organismal responses to past habitat shifts, probably mediated by specific natural-history traits. This paper provides the first direct evidence that taxa endemic to the Caatinga were affected by past forest interactions. (AU)

FAPESP's process: 11/50146-6 - Comparative phylogeography, phylogeny, paleoclimate modeling, and taxonomy of neotropical reptiles and amphibians
Grantee:Miguel Trefaut Urbano Rodrigues
Support type: BIOTA-FAPESP Program - Thematic Grants
FAPESP's process: 13/50741-7 - Diversity and conservation of Brazilian amphibians
Grantee:Célio Fernando Baptista Haddad
Support type: BIOTA-FAPESP Program - Thematic Grants
FAPESP's process: 12/06611-9 - The history of the Caatinga: mapping genetic patterns and evolutionary processes in an endemic species using rapid evolution markers
Grantee:Maria Tereza Chiarioni Thomé
Support type: Scholarships abroad - Research Internship - Post-doctor
FAPESP's process: 03/10335-8 - Systematics and evolution of the herpetological fauna from Neotropical areas
Grantee:Miguel Trefaut Urbano Rodrigues
Support type: Research Projects - Thematic Grants
FAPESP's process: 11/51392-0 - History of Caatinga: comparative phylogeography of amphibians facing a xeric biome
Grantee:Maria Tereza Chiarioni Thomé
Support type: Scholarships in Brazil - Post-Doctorate