Editorial: Regional coastal deoxygenation and related ecological and biogeochemical modifications in a warming climate
Language
EN
Article de revue
This item was published in
Frontiers in Marine Science. 2023-02-06, vol. 10
English Abstract
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 ...Read more >
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.Read less <
English Keywords
Dissolved oxygen
Hypoxia
Coastal Monitoring