Contrasted phylogeographic patterns of hydrothermal vent gastropods along South West Pacific: Woodlark Basin, a possible contact zone and/or stepping-stone

Type Article
Date 2022-10
Language English
Author(s) Poitrimol CamilleORCID1, 2, Thiébaut Éric1, Daguin-Thiébaut Claire1, Le Port Anne-Sophie1, Ballenghien Marion1, Tran Lu y Adrien3, Jollivet Didier1, Hourdez Stéphane4, Matabos MarjolaineORCID2
Affiliation(s) 1 : Adaptation et Diversite´ en Milieu Marin, Station Biologique de Roscoff, Sorbonne Universite , CNRS, Roscoff, France
2 : Biologie et Ecologie des Ecosystèmes marins Profonds, Ifremer, CNRS, UBO, Plouzane , France
3 : Institut des Sciences de l’Evolution de Montpellier, Universite Montpellier, CNRS, EPHE, IRD, Montpellier, France
4 : Laboratoire d’Ecoge´ochimie des Environnements Benthiques, Observatoire Oceanologique de Banyuls, Sorbonne Universite , CNRS, Banyuls-sur-Mer, France
Source Plos One (1932-6203) (Public Library of Science (PLoS)), 2022-10 , Vol. 17 , N. 10 , P. e0275638 (27p.)
DOI 10.1371/journal.pone.0275638
WOS© Times Cited 7

Understanding drivers of biodiversity patterns is essential to evaluate the potential impact of deep-sea mining on ecosystems resilience. While the South West Pacific forms an independent biogeographic province for hydrothermal vent fauna, different degrees of connectivity among basins were previously reported for a variety of species depending on their ability to disperse. In this study, we compared phylogeographic patterns of several vent gastropods across South West Pacific back-arc basins and the newly-discovered La Scala site on the Woodlark Ridge by analysing their genetic divergence using a barcoding approach. We focused on six genera of vent gastropods widely distributed in the region: Lepetodrilus, Symmetromphalus, Lamellomphalus, Shinkailepas, Desbruyeresia and Provanna. A wide-range sampling was conducted at different vent fields across the Futuna Volcanic Arc, the Manus, Woodlark, North Fiji, and Lau Basins, during the CHUBACARC cruise in 2019. The Cox1-based genetic structure of geographic populations was examined for each taxon to delineate putative cryptic species and assess potential barriers or contact zones between basins. Results showed contrasted phylogeographic patterns among species, even between closely related species. While some species are widely distributed across basins (i.e. Shinkailepas tollmanni, Desbruyeresia melanioides and Lamellomphalus) without evidence of strong barriers to gene flow, others are restricted to one (i.e. Shinkailepas tufari complex of cryptic species, Desbruyeresia cancellata and D. costata). Other species showed intermediate patterns of isolation with different lineages separating the Manus Basin from the Lau/North Fiji Basins (i.e. Lepetodrilus schrolli, Provanna and Symmetromphalus spp.). Individuals from the Woodlark Basin were either endemic to this area (though possibly representing intermediate OTUs between the Manus Basin and the other eastern basins populations) or, coming into contact from these basins, highlighting the stepping-stone role of the Woodlark Basin in the dispersal of the South West Pacific vent fauna. Results are discussed according to the dispersal ability of species and the geological history of the South West Pacific.

Full Text
File Pages Size Access
Publisher's official version 27 3 MB Open access
S1 Fig. Cox1 Maximum Likelihood trees inferred from Cox1 sequences from Lepetodrilus (A), Symmetromphalus and Lamellomphalus (B), Shinkailepas (C) and Desbruyeresia and Provanna (D) within their ... 4 534 KB Open access
Top of the page

How to cite 

Poitrimol Camille, Thiébaut Éric, Daguin-Thiébaut Claire, Le Port Anne-Sophie, Ballenghien Marion, Tran Lu y Adrien, Jollivet Didier, Hourdez Stéphane, Matabos Marjolaine (2022). Contrasted phylogeographic patterns of hydrothermal vent gastropods along South West Pacific: Woodlark Basin, a possible contact zone and/or stepping-stone. Plos One, 17(10), e0275638 (27p.). Publisher's official version : , Open Access version :