Articles | Volume 18, issue 8
Biogeosciences, 18, 2539–2557, 2021
https://doi.org/10.5194/bg-18-2539-2021
Biogeosciences, 18, 2539–2557, 2021
https://doi.org/10.5194/bg-18-2539-2021
Research article
22 Apr 2021
Research article | 22 Apr 2021

Impact of bottom trawling on sediment biogeochemistry: a modelling approach

Emil De Borger et al.

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Revised manuscript accepted for BG
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Cited articles

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Almroth, E., Tengberg, A., Andersson, J. H., Pakhomova, S., and Hall, P. O. J.: Effects of resuspension on benthic fluxes of oxygen, nutrients, dissolved inorganic carbon, iron and manganese in the Gulf of Finland, Baltic Sea, Cont. Shelf Res., 29, 807–818, https://doi.org/10.1016/j.csr.2008.12.011, 2009. 
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Bottom trawling alters benthic mineralization: the recycling of organic material (OM) to free nutrients. To better understand how this occurs, trawling events were added to a model of seafloor OM recycling. Results show that bottom trawling reduces OM and free nutrients in sediments through direct removal thereof and of fauna which transport OM to deeper sediment layers protected from fishing. Our results support temporospatial trawl restrictions to allow key sediment functions to recover.
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