Data from: The temporal window of ecological adaptation in postglacial lakes: a comparison of head morphology, trophic position and habitat use in Norwegian threespine stickleback populations

• Main Authors: Østbye, Kjartan, Harrod, Chris, Gregersen, Finn, Klepaker, Tom, Schulz, Michael, Schluter, Dolph, Vøllestad, Leif Asbjørn
• Other Authors: Federated Research Data Repository, Dépôt fédéré de données de recherche
• Format: Dataset
• Language: unknown
• Published: Dryad Digital Repository 2016
• Subjects: Adaptive radiation; Natural selection; Ecological niche; Stable isotopic analysis; Isostatic uplift; ice sheet; Benthic-limnetic stickleback species pairs; Europe; North America; post-glacial; Holocene; Pleistocene; Gasterosteus aculeatus; Life sciences; medicine and health care; Other; envir; geo; Norway; Ice Sheet
• Online Access: https://doi.org/10.5061/dryad.qp512; https://doi.org/10.14288/1.0397754; https://doi.org/10.5683/sp2/jowxr6

Dryad version number: 1 Version status: submitted Dryad curation status: Published Sharing link: https://datadryad.org/stash/share/9q94sSHI6ex5_A1xM3COoSKiaXhSDwtrXhQ0L3IPrFE Storage size: 617623 Visibility: public Usage notes Read me file with location codes 0 Sample codes to locality names.xls 1 Dataset-Freshwater Data comparing the freshwater stickleback only; with principal component scores (see details in the manuscript). 2 Dataset-Freshwater and marine Data comparing the marine and freshwater stickleback; with principal component scores (see details in the manuscript). 3 Dataset- Freshwater, marine and North American Data comparing the marine and freshwater stickleback from Norway and the two North American species pairs; with principal component scores (see details in the manuscript). Abstract Background: Studying how trophic traits and niche use are related in natural populations is important in order to understand adaptation and specialization. Here, we describe trophic trait diversity in twenty-five Norwegian freshwater threespine stickleback populations and their putative marine ancestor, and relate trait differences to postglacial lake age. By studying lakes of different ages, depths and distance to the sea we examine key environmental variables that may predict adaptation in trophic position and habitat use. We measured trophic traits including geometric landmarks that integrated variation in head shape as well as gillraker length and number. Trophic position (Tpos) and niche use (α) were estimated from stable isotopes (δ13C, δ15N). A comparison of head shape was also made with two North American benthic-limnetic species pairs. Results: We found that head shape differed between marine and freshwater sticklebacks, with marine sticklebacks having more upturned mouths, smaller eyes, larger opercula and deeper heads. Size-adjusted gillraker lengths were larger in marine than in freshwater stickleback. Norwegian sticklebacks were compared on the same head shape axis as the one differentiating the ...