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Phillips JG, Linscott TM, Rankin AM, Kraemer AC, Shoobs NF, Parent CE. Archipelago-Wide Patterns of Colonization and Speciation Among an Endemic Radiation of Galápagos Land Snails. J Hered 2021; 111:92-102. [PMID: 31841140 DOI: 10.1093/jhered/esz068] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Accepted: 11/08/2019] [Indexed: 01/18/2023] Open
Abstract
Newly arrived species on young or remote islands are likely to encounter less predation and competition than source populations on continental landmasses. The associated ecological release might facilitate divergence and speciation as colonizing lineages fill previously unoccupied niche space. Characterizing the sequence and timing of colonization on islands represents the first step in determining the relative contributions of geographical isolation and ecological factors in lineage diversification. Herein, we use genome-scale data to estimate timing of colonization in Naesiotus snails to the Galápagos islands from mainland South America. We test inter-island patterns of colonization and within-island radiations to understand their contribution to community assembly. Partly contradicting previously published topologies, phylogenetic reconstructions suggest that most Naesiotus species form island-specific clades, with within-island speciation dominating cladogenesis. Galápagos Naesiotus also adhere to the island progression rule, with colonization proceeding from old to young islands and within-island diversification occurring earlier on older islands. Our work provides a framework for evaluating the contribution of colonization and in situ speciation to the diversity of other Galápagos lineages.
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Affiliation(s)
- John G Phillips
- Department of Biological Sciences, University of Idaho, Moscow ID.,Institute for Bioinformatics and Evolutionary Studies (IBEST), University of Idaho, Moscow, ID.,BEACON Center for Evolution in Action, East Lansing, MI
| | - T Mason Linscott
- Department of Biological Sciences, University of Idaho, Moscow ID.,Institute for Bioinformatics and Evolutionary Studies (IBEST), University of Idaho, Moscow, ID.,BEACON Center for Evolution in Action, East Lansing, MI
| | - Andrew M Rankin
- Department of Biological Sciences, University of Idaho, Moscow ID.,Institute for Bioinformatics and Evolutionary Studies (IBEST), University of Idaho, Moscow, ID.,BEACON Center for Evolution in Action, East Lansing, MI
| | - Andrew C Kraemer
- Department of Biological Sciences, University of Idaho, Moscow ID.,Department of Biology, Creighton University, Omaha, NE
| | - Nathaniel F Shoobs
- Department of Malacology, Academy of Natural Sciences of Drexel University, Philadelphia, PA.,Department of Biodiversity, Earth, and Environmental Science, Drexel University, Philadelphia, PA
| | - Christine E Parent
- Department of Biological Sciences, University of Idaho, Moscow ID.,Institute for Bioinformatics and Evolutionary Studies (IBEST), University of Idaho, Moscow, ID.,BEACON Center for Evolution in Action, East Lansing, MI
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Deepak V, Maddock ST, Williams R, Nagy ZT, Conradie W, Rocha S, James Harris D, Perera A, Gvoždík V, Doherty-Bone TM, Kamei RG, Menegon M, Labisko J, Morel C, Cooper N, Day JJ, Gower DJ. Molecular phylogenetics of sub-Saharan African natricine snakes, and the biogeographic origins of the Seychelles endemic Lycognathophis seychellensis. Mol Phylogenet Evol 2021; 161:107152. [PMID: 33741534 DOI: 10.1016/j.ympev.2021.107152] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 03/08/2021] [Accepted: 03/08/2021] [Indexed: 10/21/2022]
Abstract
Phylogenetic relationships of sub-Saharan African natricine snakes are understudied and poorly understood, which in turn has precluded analyses of the historical biogeography of the Seychelles endemic Lycognathophis seychellensis. We inferred the phylogenetic relationships of Seychelles and mainland sub-Saharan natricines by analysing a multilocus DNA sequence dataset for three mitochondrial (mt) and four nuclear (nu) genes. The mainland sub-Saharan natricines and L. seychellensis comprise a well-supported clade. Two maximally supported sets of relationships within this clade are (Limnophis,Natriciteres) and (Afronatrix,(Hydraethiops,Helophis)). The relationships of L. seychellensis with respect to these two lineages are not clearly resolved by analysing concatenated mt and nu data. Analysed separately, nu data best support a sister relationship of L. seychellensis with (Afronatrix,(Hydraethiops,Helophis)) and mt data best support a sister relationship with all mainland sub-Saharan natricines. Methods designed to cope with incomplete lineage sorting strongly favour the former hypothesis. Genetic variation among up to 33 L. seychellensis from five Seychelles islands is low. Fossil calibrated divergence time estimates support an overseas dispersal of the L. seychellensis lineage to the Seychelles from mainland Africa ca. 43-25 million years before present (Ma), rather than this taxon being a Gondwanan relic.
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Affiliation(s)
- V Deepak
- Department of Life Sciences, Natural History Museum, London SW7 5BD, UK.
| | - Simon T Maddock
- Department of Life Sciences, Natural History Museum, London SW7 5BD, UK; School of Biology, Chemistry and Forensic Science, Wolverhampton University, WV1 1LY, UK; Island Biodiversity and Conservation Centre, University of Seychelles, Mahé, Seychelles
| | - Rhiannon Williams
- Department of Life Sciences, Natural History Museum, London SW7 5BD, UK; NRA Environmental Consultants, Cairns, Queensland 4870, Australia
| | | | - Werner Conradie
- Port Elizabeth Museum (Bayworld), Humewood, Port Elizabeth 6013, South Africa; Department of Nature Conservation Management, Natural Resource Science and Management Cluster, Faculty of Science, George Campus, Nelson Mandela University, George, South Africa
| | - Sara Rocha
- Biomedical Research Center (CINBIO), University of Vigo & Galicia Sur Health Institute, Vigo, Spain
| | - D James Harris
- CIBIO-InBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, University of Porto, 4485-661 Vairão, Portugal
| | - Ana Perera
- CIBIO-InBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, University of Porto, 4485-661 Vairão, Portugal
| | - Václav Gvoždík
- Institute of Vertebrate Biology of the Czech Academy of Sciences, Brno, Czech Republic; National Museum, Department of Zoology, Prague, Czech Republic
| | - Thomas M Doherty-Bone
- Department of Life Sciences, Natural History Museum, London SW7 5BD, UK; Conservation Programs, Royal Zoological Society of Scotland, Edinburgh EH12 6TL, UK
| | - Rachunliu G Kamei
- Department of Life Sciences, Natural History Museum, London SW7 5BD, UK
| | - Michele Menegon
- Division of Biology & Conservation Ecology, Manchester Metropolitan University, UK; PAMS Foundation, P.O. Box 16556, Arusha, Tanzania
| | - Jim Labisko
- Island Biodiversity and Conservation Centre, University of Seychelles, Mahé, Seychelles; Durrell Institute of Conservation and Ecology, School of Anthropology and Conservation, University of Kent, Canterbury CT2 7NR, UK; Department of Genetics, Evolution and Environment, University College London, London WC1E 6BT, UK
| | | | - Natalie Cooper
- Department of Life Sciences, Natural History Museum, London SW7 5BD, UK
| | - Julia J Day
- Department of Genetics, Evolution and Environment, University College London, London WC1E 6BT, UK
| | - David J Gower
- Department of Life Sciences, Natural History Museum, London SW7 5BD, UK; Island Biodiversity and Conservation Centre, University of Seychelles, Mahé, Seychelles
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The roles of vicariance and isolation by distance in shaping biotic diversification across an ancient archipelago: evidence from a Seychelles caecilian amphibian. BMC Evol Biol 2020; 20:110. [PMID: 32847507 PMCID: PMC7448330 DOI: 10.1186/s12862-020-01673-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Accepted: 08/12/2020] [Indexed: 11/16/2022] Open
Abstract
Background Island systems offer excellent opportunities for studying the evolutionary histories of species by virtue of their restricted size and easily identifiable barriers to gene flow. However, most studies investigating evolutionary patterns and processes shaping biotic diversification have focused on more recent (emergent) rather than ancient oceanic archipelagos. Here, we focus on the granitic islands of the Seychelles, which are unusual among island systems because they have been isolated for a long time and are home to a monophyletic radiation of caecilian amphibians that has been separated from its extant sister lineage for ca. 65–62 Ma. We selected the most widespread Seychelles caecilian species, Hypogeophis rostratus, to investigate intraspecific morphological and genetic (mitochondrial and nuclear) variation across the archipelago (782 samples from nine islands) to identify patterns and test processes that shaped their evolutionary history within the Seychelles. Results Overall a signal of strong geographic structuring with distinct northern- and southern-island clusters were identified across all datasets. We suggest that these distinct groups have been isolated for ca. 1.26 Ma years without subsequent migration between them. Populations from the somewhat geographically isolated island of Frégate showed contrasting relationships to other islands based on genetic and morphological data, clustering alternatively with northern-island (genetic) and southern-island (morphological) populations. Conclusions Although variation in H. rostratus across the Seychelles is explained more by isolation-by-distance than by adaptation, the genetic-morphological incongruence for affinities of Frégate H. rostratus might be caused by local adaptation over-riding the signal from their vicariant history. Our findings highlight the need of integrative approaches to investigate fine-scale geographic structuring to uncover underlying diversity and to better understand evolutionary processes on ancient, continental islands.
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Labisko J, Griffiths RA, Chong-Seng L, Bunbury N, Maddock ST, Bradfield KS, Taylor ML, Groombridge JJ. Endemic, endangered and evolutionarily significant: cryptic lineages in Seychelles’ frogs (Anura: Sooglossidae). Biol J Linn Soc Lond 2019. [DOI: 10.1093/biolinnean/bly183] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Jim Labisko
- Durrell Institute of Conservation and Ecology, School of Anthropology and Conservation, University of Kent, Canterbury, UK
- Island Biodiversity and Conservation, Anse Royale, Mahé, Seychelles
| | - Richard A Griffiths
- Durrell Institute of Conservation and Ecology, School of Anthropology and Conservation, University of Kent, Canterbury, UK
| | | | - Nancy Bunbury
- Seychelles Islands Foundation, Victoria, Mahé, Seychelles
- Centre for Ecology and Conservation, University of Exeter, UK
| | - Simon T Maddock
- Island Biodiversity and Conservation, Anse Royale, Mahé, Seychelles
- School of Biology, Chemistry and Forensic Science, Faculty of Science and Engineering, University of Wolverhampton, Wolverhampton, UK
- Department of Life Sciences, The Natural History Museum, London, UK
- Department of Genetics, Evolution and Environment, University College London, London, UK
| | | | - Michelle L Taylor
- Durrell Institute of Conservation and Ecology, School of Anthropology and Conservation, University of Kent, Canterbury, UK
| | - Jim J Groombridge
- Durrell Institute of Conservation and Ecology, School of Anthropology and Conservation, University of Kent, Canterbury, UK
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The Hitchhiker Wave: Non-native Small Terrestrial Vertebrates in the Galapagos. UNDERSTANDING INVASIVE SPECIES IN THE GALAPAGOS ISLANDS 2018. [DOI: 10.1007/978-3-319-67177-2_7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Daniels SR, Phiri EE, Klaus S, Albrecht C, Cumberlidge N. Multilocus Phylogeny of the Afrotropical Freshwater Crab Fauna Reveals Historical Drainage Connectivity and Transoceanic Dispersal Since the Eocene. Syst Biol 2015; 64:549-67. [PMID: 25649930 DOI: 10.1093/sysbio/syv011] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2014] [Accepted: 01/28/2015] [Indexed: 11/14/2022] Open
Abstract
Phylogenetic reconstruction, divergence time estimations and ancestral range estimation were undertaken for 66% of the Afrotropical freshwater crab fauna (Potamonautidae) based on four partial DNA loci (12S rRNA, 16S rRNA, cytochrome oxidase one [COI], and histone 3). The present study represents the most comprehensive taxonomic sampling of any freshwater crab family globally, and explores the impact of paleodrainage interconnectivity on cladogenesis among freshwater crabs. Phylogenetic analyses of the total evidence data using maximum-likelihood (ML), maximum parsimony (MP), and Bayesian inference (BI) produced a robust statistically well-supported tree topology that reaffirmed the monophyly of the Afrotropical freshwater crab fauna. The estimated divergence times suggest that the Afrotropical Potamonautidae diverged during the Eocene. Cladogenesis within and among several genera occurred predominantly during the Miocene, which was associated with major tectonic and climatic ameliorations throughout the region. Paleodrainage connectivity was observed with specimens from the Nilo-Sudan and East African coast proving to be sister to specimens from the Upper Guinea Forests in West Africa. In addition, we observed strong sister taxon affinity between specimens from East Africa and the Congo basin, including specimens from Lake Tanganyika, while the southern African fauna was retrieved as sister to the Angolan taxa. Within the East African clade we observed two independent transoceanic dispersal events, one to the Seychelles Archipelago and a second to Madagascar, while we observe a single transoceanic dispersal event from West Africa to São Tomé. The ancestral area estimation suggested a West African/East African ancestral range for the family with multiple dispersal events between southern Africa and East Africa, and between East Africa and Central Africa The taxonomic implications of our results are discussed in light of the widespread paraphyly evident among a number of genera.
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Affiliation(s)
- Savel R Daniels
- Department of Botany and Zoology, Private Bag X1, University of Stellenbosch, Matieland 7602, South Africa; Department of Ecology and Evolution, J. W. Goethe-University, Biologicum, Frankfurt am Main 60438, Germany; Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, Peoples Republic of China; Department of Animal Ecology and Systematics, Justus Liebig University, Giessen 35392, Germany; and Department of Biology, Northern Michigan University, Marquette, MI 49855-5376, USA
| | - Ethel E Phiri
- Department of Botany and Zoology, Private Bag X1, University of Stellenbosch, Matieland 7602, South Africa; Department of Ecology and Evolution, J. W. Goethe-University, Biologicum, Frankfurt am Main 60438, Germany; Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, Peoples Republic of China; Department of Animal Ecology and Systematics, Justus Liebig University, Giessen 35392, Germany; and Department of Biology, Northern Michigan University, Marquette, MI 49855-5376, USA
| | - Sebastian Klaus
- Department of Botany and Zoology, Private Bag X1, University of Stellenbosch, Matieland 7602, South Africa; Department of Ecology and Evolution, J. W. Goethe-University, Biologicum, Frankfurt am Main 60438, Germany; Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, Peoples Republic of China; Department of Animal Ecology and Systematics, Justus Liebig University, Giessen 35392, Germany; and Department of Biology, Northern Michigan University, Marquette, MI 49855-5376, USA Department of Botany and Zoology, Private Bag X1, University of Stellenbosch, Matieland 7602, South Africa; Department of Ecology and Evolution, J. W. Goethe-University, Biologicum, Frankfurt am Main 60438, Germany; Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, Peoples Republic of China; Department of Animal Ecology and Systematics, Justus Liebig University, Giessen 35392, Germany; and Department of Biology, Northern Michigan University, Marquette, MI 49855-5376, USA
| | - Christian Albrecht
- Department of Botany and Zoology, Private Bag X1, University of Stellenbosch, Matieland 7602, South Africa; Department of Ecology and Evolution, J. W. Goethe-University, Biologicum, Frankfurt am Main 60438, Germany; Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, Peoples Republic of China; Department of Animal Ecology and Systematics, Justus Liebig University, Giessen 35392, Germany; and Department of Biology, Northern Michigan University, Marquette, MI 49855-5376, USA
| | - Neil Cumberlidge
- Department of Botany and Zoology, Private Bag X1, University of Stellenbosch, Matieland 7602, South Africa; Department of Ecology and Evolution, J. W. Goethe-University, Biologicum, Frankfurt am Main 60438, Germany; Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, Peoples Republic of China; Department of Animal Ecology and Systematics, Justus Liebig University, Giessen 35392, Germany; and Department of Biology, Northern Michigan University, Marquette, MI 49855-5376, USA
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