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Cryptic diversity in southern African kelp.
Madeira, Pedro; Reddy, Maggie M; Assis, Jorge; Bolton, John J; Rothman, Mark D; Anderson, Robert J; Kandjengo, Lineekela; Kreiner, Anja; Coleman, Melinda A; Wernberg, Thomas; De Clerck, Olivier; Leliaert, Frederik; Bandeira, Salomão; Ada, Abdul M; Neiva, João; Pearson, Gareth A; Serrão, Ester A.
Afiliación
  • Madeira P; CCMAR, University of Algarve, Gambelas, Faro, Portugal. pmomadeira@gmail.com.
  • Reddy MM; Department of Biological Sciences, University of Cape Town, Cape Town, 7701, South Africa. maggiereddy0402@gmail.com.
  • Assis J; CCMAR, University of Algarve, Gambelas, Faro, Portugal.
  • Bolton JJ; Faculty of Bioscience and Aquaculture, Nord Universitet, Bodø, Norway.
  • Rothman MD; Department of Biological Sciences, University of Cape Town, Cape Town, 7701, South Africa. john.bolton@uct.ac.za.
  • Anderson RJ; Department of Biological Sciences, University of Cape Town, Cape Town, 7701, South Africa. Mark.Rothman@uct.ac.za.
  • Kandjengo L; Department of Environment, Forestry and Fisheries, Private Bag X2, Vlaeberg, 8012, South Africa. Mark.Rothman@uct.ac.za.
  • Kreiner A; Department of Biological Sciences, University of Cape Town, Cape Town, 7701, South Africa.
  • Coleman MA; Department of Fisheries and Ocean Sciences, University of Namibia, Sam Nujoma Campus, Henties Bay, Namibia.
  • Wernberg T; National Marine Information and Research Centre, Ministry of Fisheries and Marine Resources, Swakopmund, Namibia.
  • De Clerck O; New South Wales Fisheries, National Marine Science Centre, 2 Bay Drive, Coffs Harbour, NSW, 2450, Australia.
  • Leliaert F; National Marine Science Centre, Southern Cross University, 2 Bay Drive, Coffs Harbour, NSW, 2450, Australia.
  • Bandeira S; UWA Oceans Institute and School of Biological Sciences, University of Western Australia, 35 Stirling Highway, Crawley, WA, 6009, Australia.
  • Ada AM; UWA Oceans Institute and School of Biological Sciences, University of Western Australia, 35 Stirling Highway, Crawley, WA, 6009, Australia.
  • Neiva J; Biology Department, Ghent University, Krijgslaan 281 S8, 9000, Ghent, Belgium.
  • Pearson GA; Meise Botanic Garden, 1860, Meise, Belgium.
  • Serrão EA; Department of Biological Sciences, Eduardo Mondlane University, Maputo, Mozambique.
Sci Rep ; 14(1): 11071, 2024 05 14.
Article en En | MEDLINE | ID: mdl-38745036
ABSTRACT
The southern coast of Africa is one of the few places in the world where water temperatures are predicted to cool in the future. This endemism-rich coastline is home to two sister species of kelps of the genus Ecklonia maxima and Ecklonia radiata, each associated with specific thermal niches, and occuring primarily on opposite sides of the southern tip of Africa. Historical distribution records indicate that E. maxima has recently shifted its distribution ~ 70 km eastward, to sites where only E. radiata was previously reported. The contact of sister species with contrasting thermal affinities and the occurrence of mixed morphologies raised the hypothesis that hybridization might be occurring in this contact zone. Here we describe the genetic structure of the genus Ecklonia along the southern coast of Africa and investigate potential hybridization and cryptic diversity using a combination of nuclear microsatellites and mitochondrial markers. We found that both species have geographically discrete genetic clusters, consistent with expected phylogeographic breaks along this coastline. In addition, depth-isolated populations were found to harbor unique genetic diversity, including a third Ecklonia lineage. Mito-nuclear discordance and high genetic divergence in the contact zones suggest multiple hybridization events between Ecklonia species. Discordance between morphological and molecular identification suggests the potential influence of abiotic factors leading to convergent phenotypes in the contact zones. Our results highlight an example of cryptic diversity and hybridization driven by contact between two closely related keystone species with contrasting thermal affinities.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Filogenia / Variación Genética / Kelp País/Región como asunto: Africa Idioma: En Revista: Sci Rep Año: 2024 Tipo del documento: Article País de afiliación: Portugal Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Filogenia / Variación Genética / Kelp País/Región como asunto: Africa Idioma: En Revista: Sci Rep Año: 2024 Tipo del documento: Article País de afiliación: Portugal Pais de publicación: Reino Unido