ZHANG, Wenxia; YU, Liuqian; SCHMIDT, Sabine; ORFILA, Alejandro; DIAS, João Miguel

doi:10.3389/fmars.2023.1146877

Environnements et Paléoenvironnements OCéaniques [EPOC]

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Frontiers in Marine Science. 2023-02-06, vol. 10

Résumé en anglais

Coastal ecosystems play tremendous roles in socio-economic development, but their functions are degrading due to human activities. One of the most alarming degradations is coastal deoxygenation, driven primarily by the over-enrichment of anthropogenic nutrients and organic matter (eutrophication) in the coastal waters. The coastal deoxygenation has led to the worldwide spread of hypoxic zones (where dissolved oxygen concentration is less than 2 mg/L), with the number of reported hypoxic sites increasing from 45 in the 1960s to around 700 nowadays. Besides being perturbed by human activities locally, coastal waters respond more rapidly than the open ocean to global climate change such as ocean warming. Warmer water temperature reduces oxygen solubility, weakens the mixing of oxygen-rich surface water with oxygen-poor bottom water, and enhances biogeochemical oxygen consumption, exacerbating the coastal deoxygenation situation.< Réduire

Mots clés en anglais

Dissolved oxygen

Hypoxia

Coastal Monitoring

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https://oskar-bordeaux.fr/handle/20.500.12278/188621

DOI

http://dx.doi.org/10.3389/fmars.2023.1146877

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EPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805

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Editorial: Regional coastal deoxygenation and related ecological and biogeochemical modifications in a warming climate

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Résumé en anglais

Mots clés en anglais

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