Biogeochemical dynamics in a marine storm demonstrates differences between natural and anthropogenic impacts.
Biogeochemistry
Fisheries impacts
Storm impacts
Water column
Journal
Scientific reports
ISSN: 2045-2322
Titre abrégé: Sci Rep
Pays: England
ID NLM: 101563288
Informations de publication
Date de publication:
16 Apr 2024
16 Apr 2024
Historique:
received:
07
08
2023
accepted:
09
04
2024
medline:
17
4
2024
pubmed:
17
4
2024
entrez:
16
4
2024
Statut:
epublish
Résumé
This study explores the impact of a wind storm on sediment resuspension and marine biogeochemical dynamics. Additionally, the storm took place during an expedition researching bottom trawling, enabling the direct comparison of certain natural and fisheries-related disturbances. The storm was initiated by a decline in atmospheric pressure and a 2 h period of gale force winds, which was followed by over 40 h of elevated bottom currents. Storm induced turbidity, potentially a cumulative post-fishing impact, was remarkably higher compared to what was observed in a recent trawling event. Storm-induced mixing and movement of water masses led to decreased silicate and increased phosphate concentrations in the water column, accompanied by lower salinity and higher fluorescence. The erosion depth of the seabed averaged around 0.3 cm during the peak turbidity period. Trawl-induced erosion in the area has been measured at over twice that depth, and has been linked to intermittent reductions in near-bed oxygen levels. In contrast, storm-induced turbidity coincided with increased oxygen due to wave mixing, suggesting inherent differences in how trawling and storms can oxidize reduced substances. These findings suggest that storms have a greater regional impact, whereas the local impacts of bottom trawling on biogeochemistry can be more significant.
Identifiants
pubmed: 38627480
doi: 10.1038/s41598-024-59317-8
pii: 10.1038/s41598-024-59317-8
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
8802Subventions
Organisme : This research was funded jointly by the European Maritime and Fisheries Fund (EMFF) and the Dutch Ministry of Agriculture Nature and Food Quality (LNV)
ID : 1300021172
Informations de copyright
© 2024. The Author(s).
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