Articles | Volume 18, issue 3
Biogeosciences, 18, 1049–1065, 2021
https://doi.org/10.5194/bg-18-1049-2021
Biogeosciences, 18, 1049–1065, 2021
https://doi.org/10.5194/bg-18-1049-2021

Research article 12 Feb 2021

Research article | 12 Feb 2021

Impacts of biogenic polyunsaturated aldehydes on metabolism and community composition of particle-attached bacteria in coastal hypoxia

Zhengchao Wu et al.

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Short summary
Seasonal hypoxia in the nearshore bottom waters frequently occurs in the Pearl River estuary. Aerobic respiration is the ultimate cause of local hypoxia. We found an elevated level of polyunsaturated aldehydes in the bottom water outside the estuary, which promoted the growth and metabolism of special groups of particle-attached bacteria and thus contributed to oxygen depletion in hypoxic waters. Our results may be important for understanding coastal hypoxia and its linkages to eutrophication.
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