Lake trophic status and bioaccumulation of polychlorinated biphenyls in benthic organisms: a comparison between littoral and profundal invertebrates
Author
Summary, in English
We investigated the influence of lake trophic status on accumulation of polychlorinated biphenyls (PCBs) in littoral and profundal invertebrates from 19 lakes in southern Sweden. The PCB concentration in profundal chironomids (Chironomus sp.) was negatively correlated with lake trophy but the concentration in littoral crayfish (Pacifasticus leniusculus) was unrelated to shifting nutrient regimes. PCB concentrations in chironomids were negatively correlated, while crayfish did not correlate with lake total phosphorus. Two findings indicate that different processes determine bioaccumulation in littoral and profundal invertebrates: (i) a lack of correlation between PCB concentrations in crayfish and chironomids within lakes and (ii) some differences in congener distribution in the two species. We suggest a possible explanation in that chironomids are directly exposed to settling material from the pelagic zone, while crayfish are omnivorous and feed mainly in the littoral zone. A intensive investigation on one pond population could not reveal any individual factors, such as lipid content, size, or sex, influencing bioaccumulation of PCBs in crayfish.
Department/s
- Department of Biology
- Division aquatic ecology
- Aquatic Ecology
Publishing year
2005
Language
English
Pages
1201-1209
Publication/Series
Canadian Journal of Fisheries and Aquatic Sciences
Volume
62
Issue
6
Full text
- Available as PDF - 193 kB
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Document type
Journal article
Publisher
Canadian Science Publishing, NRC Research Press
Topic
- Ecology
Status
Published
Research group
- Aquatic Ecology
ISBN/ISSN/Other
- ISSN: 1205-7533