Data from: Contrasting genetic structure of sympatric congeneric gastropods: do differences in habitat preference, abundance, and distribution matter? ...

• Main Authors: Wort, Edward J.G., Chapman, Mark A., Hawkins, Stephen John, Henshall, Lucy, Pita, Alfonso, Rius, Marc, Williams, Suzanne T., Fenberg, Phillip B.
• Format: Dataset
• Language: English
• Published: Dryad 2019
• Subjects: Steromphala umbilicalis; Steromphala pennanti; Habitat specialist; Gibbula; Steromphala; intertidal ecology; Comparative population genetics; Chay; Northeast Atlantic
• Online Access: https://dx.doi.org/10.5061/dryad.t4kv200; https://datadryad.org/stash/dataset/doi:10.5061/dryad.t4kv200

Aim: The relationship of population genetics with the ecology and biogeography of species may be explored by comparing phenotypically similar but ecologically different congeners with overlapping ranges. We compared genetic differentiation between two congeneric rocky intertidal gastropods across a major portion of their sympatric range. We hypothesized that the habitat generalist with high abundance and continuous distribution would exhibit comparatively less genetic differentiation than the habitat specialist with low abundance and a fragmented distribution. Location: Northeast Atlantic from the northwest Iberian Peninsula to southern British coastline. Taxon: Gastropoda, Trochidae, Steromphala (formerly Gibbula) Methods: Field surveys were conducted to assess presence/absence and abundance of Steromphala umbilicalis (generalist) and S. pennanti (specialist) at 23 localities along ~1800 km coastline. We isolated polymorphic microsatellite markers for both species (seven loci for S. umbilicalis and eight ... : Steromphala pennanti microsatellitesFragment sizes of different microsatellite markers for Steromphala pennanti DNA samples. Column one gives the individual (P=Point du Chay, SJ=St Jean de Luz, LOC=Loctudy, V=Vilagarcia, H=Cap de la Hague, SV=San Vicente de la Barquera); other columns give marker names. Absent data is represented by "-1".S_pennanti_msats.csvSteromphala umbilicalis microsatellitesFragment sizes of different microsatellite markers for Steromphala umbilicalis DNA samples. Column one gives the individual (B=Biarritz, C=Cap de Carteret, LOC=Loctudy, LP=Les Pierrieres, S=San Vicente de la Barquera, SW=Swanage, V=Vilagarcia); other columns give marker names. Absent data is represented by "-1".S_umbilicalis_msats.xlsxAbundance of S. umbilicalis and S. pennantiDifferent localities' (column 1) timed search (individuals/minute) abundance estimates of Steromphala umbilicalis (column two) and Steromphala pennanti (column 3). Localities north of the habitat gap labelled "1" in column 4, south of the ...