1. Geoscience Environment Toulouse, UMR 5563 CNRS, Université Paul-Sabatier, 14 Avenue Edouard-Belin, 31400 Toulouse, France
2. UMR CNRS 5805 EPOC Environnements et Paléoenvironnements Océaniques et Continentaux, Aquatic Ecotoxicology, University of Bordeaux, 33120 Arcachon, France
3. BIO-GEO-CLIM Laboratory, Tomsk State University, 36 Lenin Avenue, 634050 Tomsk, Russia
4. N. Laverov Federal Center of Integrated Arctic Research, Russian Academy of Science, 163000 Arkhangelsk, Russia
5. Earth Sciences, University College London, Gower Street, London WC1E 6BT, UK