Sköld, Mattias
- Institutionen för akvatiska resurser (SLU Aqua), Sveriges lantbruksuniversitet
Forskningsartikel2012Vetenskapligt granskad
Bradshaw, C.; Tjensvoll, Ingrid; Sköld, Mattias; Allan, Ian J; Molvaer, J.; Magnusson, J.; Naes, K.; Nilsson, Hans
Sediments are sinks for contaminants in the world's oceans. At the same time, commercial bottom trawling is estimated to affect around 15 million km(2) of the world's seafloor every year. However, few studies have investigated whether this disturbance remobilises sediment-associated contaminants and, if so, whether these are bioavailable to aquatic organisms. This field study in a trawled contaminated Norwegian fjord showed that a single 1.8 km long trawl pass created a 3-5 million m(3) sediment plume containing around 9 t contaminated sediment; ie. 200 g dw m(-2) trawled, equivalent to c. 10% of the annual gross sedimentation rate. Substantial amounts of PCDD/Fs and non-ortho PCBs were released from the sediments, likely causing a semi-permanent contaminated sediment suspension in the bottom waters. PCDD/Fs from the sediments were also taken up by mussels which, during one month, accumulated them to levels above the EU maximum advised concentration for human consumption. (c) 2012 Elsevier Ltd. All rights reserved.
Sediment resuspension; Bottom trawling; Contaminant; Bioavailability; Blue mussel; SPMD
Environmental Pollution
2012, Volym: 170, sidor: 232-241
Utgivare: ELSEVIER SCI LTD
SDG6 Säkerställa tillgången till och en hållbar förvaltning av vatten och sanitet för alla
SDG14 Bevara och nyttja haven och de marina resurserna på ett hållbart sätt för en hållbar utveckling
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Oceanografi, hydrologi, vattenresurser
DOI: https://doi.org/10.1016/j.envpol.2012.06.019
https://res.slu.se/id/publ/42571