Dwarf geckos and giant rivers: the role of the Sao Francisco River in the evolution of Lygodactylus klugei (Squamata: Gekkonidae) in the semi-arid Caatinga of north-eastern Brazil

Autor(es)

Lanna, Flavia M. ^{[1, 2]} ; Gehara, Marcelo ^[3] ; Werneck, Fernanda P. ^{[4, 5]} ; Fonseca, Emanuel M. ^{[1, 2]} ; Colli, Guarino R. ^[6] ; Sites, Jr., Jack W. ^{[7, 8, 9]} ; Rodrigues, Miguel T. ^[10] ; Garda, Adrian A. ^[11]

Afiliação do(s) autor(es):Mostrar menos -

^[1] Ohio State Univ, Dept Evolut Ecol & Organismal Biol, Columbus, OH 43210 - USA

^[2] Univ Fed Rio Grande do Norte, Programa Posgrad Ecol, Campus Univ, BR-59078900 Natal, RN - Brazil

^[3] Amer Museum Nat Hist, Dept Herpetol, 79th St Cent Pk West, New York, NY 10024 - USA

^[4] Inst Nacl Pesquisas Amazonia INPA, Programa Colecoes Cient Biol, Coordenacao Biodiversidade, BR-69067375 Manaus, Amazonas - Brazil

^[5] Harvard Univ, Dept Organism & Evolutionary Biol, Museum Comparat Biol, Cambridge, MA 02138 - USA

^[6] Univ Brasilia, Dept Zool, BR-70910900 Brasilia, DF - Brazil

^[7] Brigham Young Univ, Dept Biol, Provo, UT 84602 - USA

^[8] Brigham Young Univ, Bean Life Sci Museum, Provo, UT 84602 - USA

^[9] Austin Peay State Univ, Dept Biol, Clarksville, TN 37040 - USA

^[10] Univ Sao Paulo, Inst Biociencias, Dept Zool, BR-05508090 Sao Paulo, SP - Brazil

^[11] Univ Fed Rio Grande do Norte, Ctr Biociencias, Dept Bot & Zool, Campus Univ, BR-59078900 Natal, RN - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Biological Journal of the Linnean Society; v. 129, n. 1, p. 88-98, JAN 2020.
• Citações Web of Science: 0

Resumo

Species diversification can be strongly influenced by geomorphological features, such as mountains, valleys and rivers. Rivers can act as hard or soft barriers to gene flow depending on their size, speed of flow, historical dynamics and regional topographical characteristics. The SAo Francisco River (SFR) is the largest perennial river in the Caatinga biome in north-eastern Brazil and has been considered a barrier to gene flow and dispersal. Herein, we evaluated the role of the SFR on the evolution of Lygodactylus klugei, a small gecko from the Caatinga. Using a single-locus species delimitation method (generalized mixed Yule coalescent), we defined lineages (haploclades). Subsequently, we evaluated the role of the SFR in structuring genetic diversity in this species using a multilocus approach to quantify migration across margins. We also evaluated genetic structure based on nuclear markers, testing the number of populations found through an assignment test (STRUCTURE) across the species distribution. We recovered two mitochondrial lineages structured with respect to the SFR, but only a single population was inferred from nuclear markers. Given that we detected an influence of the SFR only on mitochondrial markers, we suggest that the current river course has acted as a relatively recent geographical barrier for L. klugei, for similar to 450 000 years. (AU)

• Processo FAPESP: 11/50146-6 - Filogeografia comparada, filogenia, modelagem paleoclimática e taxonomia de répteis e anfíbios neotropicais
• Beneficiário: Miguel Trefaut Urbano Rodrigues
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Temático