Bottom trawling resuspends sediment and releases bioavailable contaminants in a polluted fjord

被引：57

作者：

Bradshaw, C. ^{[1
]}

Tjensvoll, I. ^{[1
]}

Skold, M. ^{[2
]}

Allan, I. J. ^{[3
]}

Molvaer, J. ^{[3
]}

Magnusson, J. ^{[3
]}

Naes, K. ^{[3
]}

Nilsson, H. C. ^{[2
]}

机构：

[1] Stockholm Univ, Dept Syst Ecol, S-10691 Stockholm, Sweden

[2] Swedish Univ Agr Sci, Inst Marine Sci, Dept Aquat Resources, S-45321 Lysekil, Sweden

[3] Norwegian Inst Water Res NIVA, NO-0349 Oslo, Norway

来源：

ENVIRONMENTAL POLLUTION | 2012年 / 170卷

基金：

瑞典研究理事会;

关键词：

Sediment resuspension; Bottom trawling; Contaminant; Bioavailability; Blue mussel; SPMD; DIBENZO-P-DIOXINS; HYDROPHOBIC ORGANIC CONTAMINANTS; SEMIPERMEABLE-MEMBRANE DEVICES; GRENLAND-FJORDS; MYTILUS-EDULIS; TRACE-METALS; BLACK CARBON; ECOLOGICAL RISK; CAGED MUSSELS; BLUE MUSSEL;

D O I：

10.1016/j.envpol.2012.06.019

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

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.

引用

页码：232 / 241

页数：10

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