Seabirds as bioindicators of past and current mercury contamination : a global approach
Mercury (Hg) is a toxic metal, and its impacts on human and environmental health are a major concern. Globally, the amount of Hg released into the environment, through anthropogenic activities, has steadily increased since the Industrial Revolution. Both natural and anthropogenic Hg disperse globall...
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ftunivrochelle:oai:HAL:tel-04516268v1 2024-04-21T07:56:03+00:00 Seabirds as bioindicators of past and current mercury contamination : a global approach Les oiseaux marins, bioindicateurs de la contamination passée et actuelle par le mercure : une approche globale Cusset, Fanny LIttoral ENvironnement et Sociétés (LIENSs) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) Université de La Rochelle Paco Bustamante Yves Cherel 2023-09-18 https://theses.hal.science/tel-04516268 https://theses.hal.science/tel-04516268/document https://theses.hal.science/tel-04516268/file/2023Cusset212660.pdf en eng HAL CCSD NNT: 2023LAROS025 tel-04516268 https://theses.hal.science/tel-04516268 https://theses.hal.science/tel-04516268/document https://theses.hal.science/tel-04516268/file/2023Cusset212660.pdf info:eu-repo/semantics/OpenAccess https://theses.hal.science/tel-04516268 Animal biology. Université de La Rochelle, 2023. English. ⟨NNT : 2023LAROS025⟩ Hg Seabirds Bioindicators Remote oceans Spatial monitoring Temporal monitoring Oiseaux marins Bioindicateurs Océans éloignés Spatial Temporel [SDV.BA]Life Sciences [q-bio]/Animal biology [SDV.SA]Life Sciences [q-bio]/Agricultural sciences info:eu-repo/semantics/doctoralThesis Theses 2023 ftunivrochelle 2024-03-27T15:54:06Z Mercury (Hg) is a toxic metal, and its impacts on human and environmental health are a major concern. Globally, the amount of Hg released into the environment, through anthropogenic activities, has steadily increased since the Industrial Revolution. Both natural and anthropogenic Hg disperse globally and deposits in all ecosystems, including in remote oceans. Oceans, which cover 70% of the Earth’s surface, are poorly documented in international monitoring programs of Hg, particularly in intertropical and polar regions. In the current context of global climate, determining spatial and temporal trends in Hg contamination in these undocumented regions is crucial. Seabirds are excellent bioindicators of Hg contamination in the oceans, both across space and time, as they integrate and reflect Hg contamination of marine food webs on which they feed. After dietary assimilation, Hg is mainly excreted during moult and stored permanently in feathers. Therefore, seabird feathers represent valuable archives and act as a time-machine thanks to museum specimens. In this context, the present PhD thesis uses seabirds as bioindicators of Hg contamination in marine ecosystems, mainly from three remote oceanic regions ‒ the Arctic Ocean, the intertropical region (Pacific, Atlantic and Indian Oceans) and the Southern Ocean ‒ with two main objectives: (1) map contemporary Hg contamination at large spatial scale, and (2) document its temporal trends since the 19th century retrospectively, by using both museum-held and free-living seabirds. Thanks to unique spatial and temporal coverage, this work represents a valuable contribution to international monitoring programs that are fully involved in the implementation and effectiveness evaluation of the Minamata Convention, which aims to control and reduce anthropogenic Hg emissions at the global scale. Le mercure (Hg) est un métal toxique, qui constitue une menace majeure pour l’Homme et la biodiversité. Naturellement présent dans l’environnement, le Hg est aussi rejeté en quantité ... Doctoral or Postdoctoral Thesis Arctic Ocean Southern Ocean HAL - Université de La Rochelle |
institution |
Open Polar |
collection |
HAL - Université de La Rochelle |
op_collection_id |
ftunivrochelle |
language |
English |
topic |
Hg Seabirds Bioindicators Remote oceans Spatial monitoring Temporal monitoring Oiseaux marins Bioindicateurs Océans éloignés Spatial Temporel [SDV.BA]Life Sciences [q-bio]/Animal biology [SDV.SA]Life Sciences [q-bio]/Agricultural sciences |
spellingShingle |
Hg Seabirds Bioindicators Remote oceans Spatial monitoring Temporal monitoring Oiseaux marins Bioindicateurs Océans éloignés Spatial Temporel [SDV.BA]Life Sciences [q-bio]/Animal biology [SDV.SA]Life Sciences [q-bio]/Agricultural sciences Cusset, Fanny Seabirds as bioindicators of past and current mercury contamination : a global approach |
topic_facet |
Hg Seabirds Bioindicators Remote oceans Spatial monitoring Temporal monitoring Oiseaux marins Bioindicateurs Océans éloignés Spatial Temporel [SDV.BA]Life Sciences [q-bio]/Animal biology [SDV.SA]Life Sciences [q-bio]/Agricultural sciences |
description |
Mercury (Hg) is a toxic metal, and its impacts on human and environmental health are a major concern. Globally, the amount of Hg released into the environment, through anthropogenic activities, has steadily increased since the Industrial Revolution. Both natural and anthropogenic Hg disperse globally and deposits in all ecosystems, including in remote oceans. Oceans, which cover 70% of the Earth’s surface, are poorly documented in international monitoring programs of Hg, particularly in intertropical and polar regions. In the current context of global climate, determining spatial and temporal trends in Hg contamination in these undocumented regions is crucial. Seabirds are excellent bioindicators of Hg contamination in the oceans, both across space and time, as they integrate and reflect Hg contamination of marine food webs on which they feed. After dietary assimilation, Hg is mainly excreted during moult and stored permanently in feathers. Therefore, seabird feathers represent valuable archives and act as a time-machine thanks to museum specimens. In this context, the present PhD thesis uses seabirds as bioindicators of Hg contamination in marine ecosystems, mainly from three remote oceanic regions ‒ the Arctic Ocean, the intertropical region (Pacific, Atlantic and Indian Oceans) and the Southern Ocean ‒ with two main objectives: (1) map contemporary Hg contamination at large spatial scale, and (2) document its temporal trends since the 19th century retrospectively, by using both museum-held and free-living seabirds. Thanks to unique spatial and temporal coverage, this work represents a valuable contribution to international monitoring programs that are fully involved in the implementation and effectiveness evaluation of the Minamata Convention, which aims to control and reduce anthropogenic Hg emissions at the global scale. Le mercure (Hg) est un métal toxique, qui constitue une menace majeure pour l’Homme et la biodiversité. Naturellement présent dans l’environnement, le Hg est aussi rejeté en quantité ... |
author2 |
LIttoral ENvironnement et Sociétés (LIENSs) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) Université de La Rochelle Paco Bustamante Yves Cherel |
format |
Doctoral or Postdoctoral Thesis |
author |
Cusset, Fanny |
author_facet |
Cusset, Fanny |
author_sort |
Cusset, Fanny |
title |
Seabirds as bioindicators of past and current mercury contamination : a global approach |
title_short |
Seabirds as bioindicators of past and current mercury contamination : a global approach |
title_full |
Seabirds as bioindicators of past and current mercury contamination : a global approach |
title_fullStr |
Seabirds as bioindicators of past and current mercury contamination : a global approach |
title_full_unstemmed |
Seabirds as bioindicators of past and current mercury contamination : a global approach |
title_sort |
seabirds as bioindicators of past and current mercury contamination : a global approach |
publisher |
HAL CCSD |
publishDate |
2023 |
url |
https://theses.hal.science/tel-04516268 https://theses.hal.science/tel-04516268/document https://theses.hal.science/tel-04516268/file/2023Cusset212660.pdf |
genre |
Arctic Ocean Southern Ocean |
genre_facet |
Arctic Ocean Southern Ocean |
op_source |
https://theses.hal.science/tel-04516268 Animal biology. Université de La Rochelle, 2023. English. ⟨NNT : 2023LAROS025⟩ |
op_relation |
NNT: 2023LAROS025 tel-04516268 https://theses.hal.science/tel-04516268 https://theses.hal.science/tel-04516268/document https://theses.hal.science/tel-04516268/file/2023Cusset212660.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1796938213866078208 |