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Influence of trophic status on PCB distribution in lake sediments and biota

Berglund, Olof LU ; Larsson, Per LU ; Ewald, Göran LU and Okla, Lennart LU (2001) In Environmental Pollution 113(2). p.199-210
Abstract
We investigated the relationship between trophic status and polychlorinated biphenyl (PCB) distribution in 19 Swedish lakes. We analyzed PCB in water, phytoplankton, zooplankton, fish and sediment during two sampling periods, in spring and summer. The mass of Sigma PCB in the lake sediments was positively related to lake trophy, i.e. more PCBs were accumulated and buried in the sediment of eutrophic lakes than in oligotrophic lakes. In the oligotrophic lakes a greater fraction of the total PCB load was dissolved in water. We conclude that this is a result of higher sedimentation rates in eutrophic lakes and relatively lower turnover of organic carbon in the water column of the shallow, eutrophic lakes. In the stratified lakes, the amount... (More)
We investigated the relationship between trophic status and polychlorinated biphenyl (PCB) distribution in 19 Swedish lakes. We analyzed PCB in water, phytoplankton, zooplankton, fish and sediment during two sampling periods, in spring and summer. The mass of Sigma PCB in the lake sediments was positively related to lake trophy, i.e. more PCBs were accumulated and buried in the sediment of eutrophic lakes than in oligotrophic lakes. In the oligotrophic lakes a greater fraction of the total PCB load was dissolved in water. We conclude that this is a result of higher sedimentation rates in eutrophic lakes and relatively lower turnover of organic carbon in the water column of the shallow, eutrophic lakes. In the stratified lakes, the amount of PCB per cubic meter in the epilimnion decreased from spring to summer. We suggest that sedimentation of plankton beneath the thermocline during stratification act as a sink process of PCBs from the epilimnion (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Environmental Pollution
volume
113
issue
2
pages
199 - 210
publisher
Elsevier
external identifiers
  • scopus:0035102889
ISSN
0269-7491
DOI
language
English
LU publication?
yes
id
28cc2629-9da2-4d8a-a56f-c2e5441247e9 (old id 8163799)
date added to LUP
2007-06-27 08:41:03
date last changed
2018-05-29 12:21:51
@article{28cc2629-9da2-4d8a-a56f-c2e5441247e9,
  abstract     = {We investigated the relationship between trophic status and polychlorinated biphenyl (PCB) distribution in 19 Swedish lakes. We analyzed PCB in water, phytoplankton, zooplankton, fish and sediment during two sampling periods, in spring and summer. The mass of Sigma PCB in the lake sediments was positively related to lake trophy, i.e. more PCBs were accumulated and buried in the sediment of eutrophic lakes than in oligotrophic lakes. In the oligotrophic lakes a greater fraction of the total PCB load was dissolved in water. We conclude that this is a result of higher sedimentation rates in eutrophic lakes and relatively lower turnover of organic carbon in the water column of the shallow, eutrophic lakes. In the stratified lakes, the amount of PCB per cubic meter in the epilimnion decreased from spring to summer. We suggest that sedimentation of plankton beneath the thermocline during stratification act as a sink process of PCBs from the epilimnion},
  author       = {Berglund, Olof and Larsson, Per and Ewald, Göran and Okla, Lennart},
  issn         = {0269-7491},
  language     = {eng},
  number       = {2},
  pages        = {199--210},
  publisher    = {Elsevier},
  series       = {Environmental Pollution},
  title        = {Influence of trophic status on PCB distribution in lake sediments and biota},
  url          = {http://dx.doi.org/},
  volume       = {113},
  year         = {2001},
}