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Het OWA, het open archief van het Waterbouwkundig Laboratorium heeft tot doel alle vrij toegankelijke onderzoeksresultaten van dit instituut in digitale vorm aan te bieden. Op die manier wil het de zichtbaarheid, verspreiding en gebruik van deze onderzoeksresultaten, alsook de wetenschappelijke communicatie maximaal bevorderen.

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Anthropogenic disturbance keeps the coastal seafloor biogeochemistry in a transient state van de Velde, S.; Van Lancker, V.; Hidalgo-Martinez, S.; Berelson, W.M.; Meysman, F.J.R. (2018). Anthropogenic disturbance keeps the coastal seafloor biogeochemistry in a transient state. NPG Scientific Reports 8: 5582. https://dx.doi.org/10.1038/s41598-018-23925-y In: Scientific Reports (Nature Publishing Group). Nature Publishing Group: London. ISSN 2045-2322; e-ISSN 2045-2322, meer Is gerelateerd aan: Van de Velde, S. (2018). Anthropogenic disturbance keeps the coastal seafloor biogeochemistry in a transient state, in: Van de Velde, S. Electron shuttling and elemental cycling in the seafloor. pp. 261-296, meer

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VLIZ: Open access 313309 [ download pdf ]

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van de Velde, S., meer Van Lancker, V., meer Hidalgo-Martinez, S., meer	Berelson, W.M. Meysman, F.J.R., meer

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Abstract

Coastal sediments and continental shelves play a crucial role in global biogeochemistry, as they form the prime site of organic carbon burial. Bottom trawling and dredging are known to increasingly impact the coastal seafloor through relocation and homogenisation of sediments, yet little is known about the effects of such anthropogenic sediment reworking on the overall cycling of carbon and other elements within the coastal seafloor. Here, we document the transient recovery of the seafloor biogeochemistry after an in situ disturbance. Evidence from pore-water data and model simulations reveal a short-term increase in the overall carbon mineralisation rate, as well as a longer-term shift in the redox pathways of organic matter mineralisation, favouring organoclastic sulphate reduction over methane formation. This data suggests that anthropogenic sediment reworking could have a sizeable impact on the carbon cycle in cohesive sediments on continental shelves. This imprint will increase in the near future, along with the growing economic exploitation of the coastal ocean.

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