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Turnover of polychlorinated biphenyls in an eutrophic and an oligotrophic lake in relation to internal lake processes and atmospheric fallout

Larsson, Per LU ; Okla, Lennart LU and Cronberg, Gertrud LU (1998) In Canadian Journal of Fisheries and Aquatic Sciences 55(8). p.1926-1937
Abstract
The atmospheric deposition of PCB within the catchment areas of an oligotrophic lake and an eutrophic lake in southern Sweden resulted in a flow of about 1 mg PCB.m(-2).year(-1) to the lakes. The sedimentation of the pollutants in the lakes (measured by sediment traps) was 110 and 52 mg PCB.m(-2).year(-1) for the oligotrophic and eutrophic lakes, respectively. The concentration of pollutants in plankton (separated in fractions of >150, 45-150, and 10-45 mu m) was lower than that found in the sedimenting material. This indicated that the degradation of lipid and organic carbon was higher than the release of persistent pollutants from settling particles. Higher concentrations of PCB were recorded in the phytoplankton of the oligotrophic... (More)
The atmospheric deposition of PCB within the catchment areas of an oligotrophic lake and an eutrophic lake in southern Sweden resulted in a flow of about 1 mg PCB.m(-2).year(-1) to the lakes. The sedimentation of the pollutants in the lakes (measured by sediment traps) was 110 and 52 mg PCB.m(-2).year(-1) for the oligotrophic and eutrophic lakes, respectively. The concentration of pollutants in plankton (separated in fractions of >150, 45-150, and 10-45 mu m) was lower than that found in the sedimenting material. This indicated that the degradation of lipid and organic carbon was higher than the release of persistent pollutants from settling particles. Higher concentrations of PCB were recorded in the phytoplankton of the oligotrophic than of the eutrophic lake and attributed to higher lipid content. The higher lipid content and the higher pollutant amounts found in the primary producers suggest a mechanism that leads to zooplankton and fish displaying high pollutant concentrations in oligotrophic ecosystems. No biomagnification for phytoplankton to zooplankton was detected. The results indicate that the major part of the persistent pollutants cycling in the lakes is due to internal lake processes. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Canadian Journal of Fisheries and Aquatic Sciences
volume
55
issue
8
pages
1926 - 1937
publisher
National Research Council Canada
external identifiers
  • scopus:0031762130
ISSN
1205-7533
DOI
10.1139/cjfas-55-8-1926
language
English
LU publication?
yes
id
8ec4e5fd-2295-40f5-a086-05a1814e15d8 (old id 8163863)
date added to LUP
2015-11-04 13:34:03
date last changed
2017-07-09 03:38:03
@article{8ec4e5fd-2295-40f5-a086-05a1814e15d8,
  abstract     = {The atmospheric deposition of PCB within the catchment areas of an oligotrophic lake and an eutrophic lake in southern Sweden resulted in a flow of about 1 mg PCB.m(-2).year(-1) to the lakes. The sedimentation of the pollutants in the lakes (measured by sediment traps) was 110 and 52 mg PCB.m(-2).year(-1) for the oligotrophic and eutrophic lakes, respectively. The concentration of pollutants in plankton (separated in fractions of >150, 45-150, and 10-45 mu m) was lower than that found in the sedimenting material. This indicated that the degradation of lipid and organic carbon was higher than the release of persistent pollutants from settling particles. Higher concentrations of PCB were recorded in the phytoplankton of the oligotrophic than of the eutrophic lake and attributed to higher lipid content. The higher lipid content and the higher pollutant amounts found in the primary producers suggest a mechanism that leads to zooplankton and fish displaying high pollutant concentrations in oligotrophic ecosystems. No biomagnification for phytoplankton to zooplankton was detected. The results indicate that the major part of the persistent pollutants cycling in the lakes is due to internal lake processes.},
  author       = {Larsson, Per and Okla, Lennart and Cronberg, Gertrud},
  issn         = {1205-7533},
  language     = {eng},
  number       = {8},
  pages        = {1926--1937},
  publisher    = {National Research Council Canada},
  series       = {Canadian Journal of Fisheries and Aquatic Sciences},
  title        = {Turnover of polychlorinated biphenyls in an eutrophic and an oligotrophic lake in relation to internal lake processes and atmospheric fallout},
  url          = {http://dx.doi.org/10.1139/cjfas-55-8-1926},
  volume       = {55},
  year         = {1998},
}