Seabirds reveal mercury distribution across the North Atlantic - Université Paul Valéry Montpellier 3 Accéder directement au contenu
Article Dans Une Revue Proceedings of the National Academy of Sciences of the United States of America Année : 2024

Seabirds reveal mercury distribution across the North Atlantic

Céline Albert
Benjamin Merkel
Jens Åström
Johannis Danielsen
Alexey Ezhov
Geir Gabrielsen
Maria Gavrilo
Malin Kjellstadli Johansen
Yuri Krasnov
Jérémy Lemaire
Bergur Olsen
Paul Thompson
Paco Bustamante
Jérôme Fort

Résumé

Mercury (Hg) is a heterogeneously distributed toxicant affecting wildlife and human health. Yet, the spatial distribution of Hg remains poorly documented, especially in food webs, even though this knowledge is essential to assess large-scale risk of toxicity for the biota and human populations. Here, we used seabirds to assess, at an unprecedented population and geographic magnitude and high resolution, the spatial distribution of Hg in North Atlantic marine food webs. To this end, we combined tracking data of 837 seabirds from seven different species and 27 breeding colonies located across the North Atlantic and Atlantic Arctic together with Hg analyses in feathers representing individual seabird contamination based on their winter distribution. Our results highlight an east-west gradient in Hg concentrations with hot spots around southern Greenland and the east coast of Canada and a cold spot in the Barents and Kara Seas. We hypothesize that those gradients are influenced by eastern (Norwegian Atlantic Current and West Spitsbergen Current) and western (East Greenland Current) oceanic currents and melting of the Greenland Ice Sheet. By tracking spatial Hg contamination in marine ecosystems and through the identification of areas at risk of Hg toxicity, this study provides essential knowledge for international decisions about where the regulation of pollutants should be prioritized.
Fichier principal
Vignette du fichier
Albert et al_Manuscripts_PNAS_HAL.pdf (2.1 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-04574186 , version 1 (14-05-2024)

Identifiants

Citer

Céline Albert, Børge Moe, Hallvard Strøm, David Grémillet, Maud Brault-Favrou, et al.. Seabirds reveal mercury distribution across the North Atlantic. Proceedings of the National Academy of Sciences of the United States of America, 2024, 121 (21), pp.e2315513121. ⟨10.1073/pnas.2315513121⟩. ⟨hal-04574186⟩
0 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More