Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Speciation with gene flow in whiptail lizards from a Neotropical xeric biome

Full text
Author(s):
Show less -
Oliveira, Eliana F. [1] ; Gehara, Marcelo [2] ; Sao-Pedro, Vinicius A. [1] ; Chen, Xin [3, 4] ; Myers, Edward A. [3, 4] ; Burbrink, Frank T. [5, 3, 4] ; Mesquita, Daniel O. [6] ; Garda, Adrian A. [7] ; Colli, Guarino R. [8] ; Rodrigues, Miguel T. [9] ; Arias, Federico J. [9] ; Zaher, Hussam [10] ; Santos, Rodrigo M. L. [9] ; Costa, Gabriel C. [11]
Total Authors: 14
Affiliation:
Show less -
[1] Univ Fed Rio Grande do Norte, Posgrad Ecol, BR-59072970 Natal, RN - Brazil
[2] Univ Fed Rio Grande do Norte, Posgrad Sistemat & Evolucao, BR-59072970 Natal, RN - Brazil
[3] CUNY Coll Staten Isl, Dept Biol, Staten Isl, NY 10314 - USA
[4] CUNY, Grad Sch, Dept Biol, New York, NY 10016 - USA
[5] Amer Museum Nat Hist, Dept Herpetol, New York, NY 10024 - USA
[6] Univ Fed Paraiba, Dept Sistemat & Ecol, BR-5800000 Joao Pessoa, Paraiba - Brazil
[7] Univ Fed Rio Grande do Norte, Dept Bot & Zool, Ctr Biociencias, BR-59072970 Natal, RN - Brazil
[8] Univ Brasilia, Dept Zool, BR-70910900 Brasilia, DF - Brazil
[9] Univ Sao Paulo, Dept Zool, BR-05422970 Sao Paulo, SP - Brazil
[10] Univ Sao Paulo, Museu Zool, BR-04263000 Sao Paulo, SP - Brazil
[11] Univ Fed Rio Grande do Norte, Dept Ecol, BR-59072970 Natal, RN - Brazil
Total Affiliations: 11
Document type: Journal article
Source: Molecular Ecology; v. 24, n. 23, p. 5957-5975, DEC 2015.
Web of Science Citations: 19
Abstract

Two main hypotheses have been proposed to explain the diversification of the Caatinga biota. The riverine barrier hypothesis (RBH) claims that the SAo Francisco River (SFR) is a major biogeographic barrier to gene flow. The Pleistocene climatic fluctuation hypothesis (PCH) states that gene flow, geographic genetic structure and demographic signatures on endemic Caatinga taxa were influenced by Quaternary climate fluctuation cycles. Herein, we analyse genetic diversity and structure, phylogeographic history, and diversification of a widespread Caatinga lizard (Cnemidophorus ocellifer) based on large geographical sampling for multiple loci to test the predictions derived from the RBH and PCH. We inferred two well-delimited lineages (Northeast and Southwest) that have diverged along the Cerrado-Caatinga border during the Mid-Late Miocene (6-14Ma) despite the presence of gene flow. We reject both major hypotheses proposed to explain diversification in the Caatinga. Surprisingly, our results revealed a striking complex diversification pattern where the Northeast lineage originated as a founder effect from a few individuals located along the edge of the Southwest lineage that eventually expanded throughout the Caatinga. The Southwest lineage is more diverse, older and associated with the Cerrado-Caatinga boundaries. Finally, we suggest that C.ocellifer from the Caatinga is composed of two distinct species. Our data support speciation in the presence of gene flow and highlight the role of environmental gradients in the diversification process. (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 Opportunities: BIOTA-FAPESP Program - Thematic Grants
FAPESP's process: 12/02212-2 - Taxonomy, systematics and phylogeny the Cnemidophorus lemniscatus group (Squamata: Teiidae), based on morphological and molecular caracters
Grantee:Federico José Arias
Support Opportunities: Scholarships in Brazil - Post-Doctoral