Continental-scale patterns of hyper-cryptic diversity within the freshwater model taxon Gammarus fossarum (Crustacea, Amphipoda).
2020
Wattier, Rémi | Mamos, Tomasz | Copilaş-Ciocianu, Denis | Jelić, Mišel | Ollivier, Anthony | Chaumot, Arnaud | Danger, Michael | Felten, Vincent | Piscart, Christophe | Žganec, Krešimir | Rewicz, Tomasz | Wysocka, Anna | Rigaud, Thierry | Grabowski, Michał | Biogéosciences [UMR 6282] (BGS) ; Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS) | University of Lódź = Uniwersytet Łódzki | Université de Bâle = University of Basel = Basel Universität (Unibas) | Institute of Ecology of Nature Research Centre | Varaždin City Museum | RiverLy - Fonctionnement des hydrosystèmes (RiverLy) ; Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) | Laboratoire Interdisciplinaire des Environnements Continentaux (LIEC) ; Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS) | Ecosystèmes, biodiversité, évolution [Rennes] (ECOBIO) ; Université de Rennes (UR)-Institut Ecologie et Environnement - CNRS Ecologie et Environnement (INEE-CNRS) ; Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) | University of Zadar | University of Guelph [Guelf, Ontario, Canada] | University of Gdańsk (UG) | Adour-Garonne water agency (program Dylaq) | French Office for Biodiversity (OFB) | Ministry of Science and Higher Education, Poland : N N303 579439 | University of Lodz | Short-Term Scientific Mission (STSM) of COST Action : 39779 , CA15219 | ANR-13-BSV7-0004,MultiStress,Effets combinés de stresseurs anthropiques et du parasitisme sur la variation génétique, le comportement, la physiologie et le rôle fonctionnel d'amphipodes d'eau douce du genre Gammarus(2013) | ANR-14-CE21-0006,ProteoGam,Protéomique pour de nouveaux biomarqueurs en écotoxicologie chez les gammares: challenge de la biodiversité et immunoanalyse multiplexée comme outil de diagnostic(2014)
16 pages
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显示更多 [+] 显示较少 [-]英语. Traditional morphological diagnoses of taxonomic status remain widely used while an increasing number of studies show that one morphospecies might hide cryptic diversity, i.e. lineages with unexpectedly high molecular divergence. This hidden diversity can reach even tens of lineages, i.e. hyper cryptic diversity. Even well-studied model-organisms may exhibit overlooked cryptic diversity. Such is the case of the freshwater crustacean amphipod model taxon Gammarus fossarum. It is extensively used in both applied and basic types of research, including biodiversity assessments, ecotoxicology and evolutionary ecology. Based on COI barcodes of 4926 individuals from 498 sampling sites in 19 European countries, the present paper shows (1) hyper cryptic diversity, ranging from 84 to 152 Molecular Operational Taxonomic Units, (2) ancient diversification starting already 26 Mya in the Oligocene, and (3) high level of lineage syntopy. Even if hyper cryptic diversity was already documented in G. fossarum, the present study increases its extent fourfold, providing a first continental-scale insight into its geographical distribution and establishes several diversification hotspots, notably south-eastern and central Europe. The challenges of recording hyper cryptic diversity in the future are also discussed.
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