Global phylogeography of ridley sea turtles ( Lepidochelys spp.): evolution, demography, connectivity, and conservation.

Autor: Vilaça ST; Department of Life Sciences and Biotechnology, University of Ferrara, Ferrara, Italy., Hahn AT; Escola de Ciências da Saúde e da Vida, Pontifícia Universidade Católica do Rio Grande do Sul, Av. Ipiranga, 668, 90619-900 Porto Alegre, RS Brazil., Naro-Maciel E; Liberal Studies, New York University, 726 Broadway, New York, USA., Abreu-Grobois FA; Instituto de Ciencias del Mar y Limnología, Unidad Académica Mazatlán, Universidad Nacional Autónoma de México, Sinaloa, México., Bowen BW; Hawai'i Institute of Marine Biology, University of Hawai'i, Kaneohe, Hawai'i USA., Castilhos JC; Fundação Projeto Tamar, Sergipe, Brazil., Ciofi C; Department of Biology, University of Florence, Sesto Fiorentino (FI), Florence, Italy., FitzSimmons NN; Australian Rivers Institute, Griffith University, South East Queensland, Australia., Jensen MP; Department of Chemistry and Bioscience, Aalborg University, Aalborg, Denmark., Formia A; Department of Biology, University of Florence, Sesto Fiorentino (FI), Florence, Italy.; Gulf of Guinea Sea Turtle Program, Wildlife Conservation Society, Libreville, Gabon., Limpus CJ; Department of Environment and Resource Management, Brisbane, QLD Australia., Natali C; Department of Biology, University of Florence, Sesto Fiorentino (FI), Florence, Italy., Soares LS; Archie Carr Center for Sea Turtle Research, University of Florida, Gainesville, FL USA.; Florida Fish and Wildlife Conservation Commission, Fish and Wildlife Research Institute, Saint Petersburg, FL USA., de Thoisy B; Kwata NGO, Cayenne, French Guiana., Whiting SD; Department of Biodiversity, Conservation and Attractions, Kensington, WA Australia., Bonatto SL; Escola de Ciências da Saúde e da Vida, Pontifícia Universidade Católica do Rio Grande do Sul, Av. Ipiranga, 668, 90619-900 Porto Alegre, RS Brazil.
Jazyk: angličtina
Zdroj: Conservation genetics (Print) [Conserv Genet] 2022; Vol. 23 (6), pp. 995-1010. Date of Electronic Publication: 2022 Aug 29.
DOI: 10.1007/s10592-022-01465-3
Abstrakt: Globally distributed marine taxa are well suited for investigations of biogeographic impacts on genetic diversity, connectivity, and population demography. The sea turtle genus Lepidochelys includes the wide-ranging and abundant olive ridley ( L. olivacea ), and the geographically restricted and 'Critically Endangered' Kemp's ridley ( L. kempii ). To investigate their historical biogeography, we analyzed a large dataset of mitochondrial DNA (mtDNA) sequences from olive (n = 943) and Kemp's (n = 287) ridleys, and genotyped 15 nuclear microsatellite loci in a global sample of olive ridleys (n  =  285). We found that the ridley species split ~ 7.5 million years ago, before the Panama Isthmus closure. The most ancient mitochondrial olive ridley lineage, located in the Indian Ocean, was dated to ~ 2.2 Mya. Both mitochondrial and nuclear markers revealed significant structure for olive ridleys between Atlantic (ATL), East Pacific (EP), and Indo-West Pacific (IWP) areas. However, the divergence of mtDNA clades was very recent (< 1 Mya) with low within- clade diversity, supporting a recurrent extinction-recolonization model for these ocean regions. All data showed that ATL and IWP groups were more closely related than those in the EP, with mtDNA data supporting recent recolonization of the ATL from the IWP. Individual olive ridley dispersal between the ATL, EP, and IN/IWP could be interpreted as more male- than female-biased, and genetic diversity was lowest in the Atlantic Ocean. All populations showed signs of recent expansion, and estimated time frames were concordant with their recent colonization history. Investigating species abundance and distribution changes over time is central to evolutionary biology, and this study provides a historical biogeographic context for marine vertebrate conservation and management.
Supplementary Information: The online version contains supplementary material available at 10.1007/s10592-022-01465-3.
Competing Interests: Competing interestsWe have no conflicts of interest to disclose.
(© The Author(s) 2022, corrected publication 2022.)
Databáze: MEDLINE
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