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The effect of lake trophy on lipid content and PCB concentrations in planktonic food webs

Berglund, Olof LU ; Larsson, Per LU ; Ewald, Göran LU and Okla, Lennart LU (2001) In Ecology 82(4). p.1078-1088
Abstract
We investigated the influence of trophic status on the lipid content and polychlorinated biphenyl (PCB) concentrations in planktonic food webs from 19 lakes in southern Sweden. The lipid content in phytoplankton (10-45 mum), microzooplankton (45-150 mum) and large macrozooplankton (>500 mum) was negatively related to the total phosphorus (Tot-P) concentration in lakes. The lipid content in macrozooplankton (>150 Gem) and young-of-the-year roach (Rutilus rutilus) was not related to Tot-P in lakes. On a dry mass basis (ng/g dry mass), the sum of PCB concentrations in phytoplankton and microzooplankton was negatively related to Tot-P in lakes. Thus, the PCB concentrations in phytoplankton and microzooplankton were explained by the... (More)
We investigated the influence of trophic status on the lipid content and polychlorinated biphenyl (PCB) concentrations in planktonic food webs from 19 lakes in southern Sweden. The lipid content in phytoplankton (10-45 mum), microzooplankton (45-150 mum) and large macrozooplankton (>500 mum) was negatively related to the total phosphorus (Tot-P) concentration in lakes. The lipid content in macrozooplankton (>150 Gem) and young-of-the-year roach (Rutilus rutilus) was not related to Tot-P in lakes. On a dry mass basis (ng/g dry mass), the sum of PCB concentrations in phytoplankton and microzooplankton was negatively related to Tot-P in lakes. Thus, the PCB concentrations in phytoplankton and microzooplankton were explained by the decreasing lipid content of these fractions with increasing trophic status of lakes; and when normalized to lipid content (ng/g extractable lipid) we found no differences in PCB concentrations among lakes. We conclude that the lipid content of phytoplankton increased with increased nutrient stress, explaining the negative relationship between lake trophy and phytoplankton organochlorine (OC) concentrations on a dry mass basis. The relationship found between lipids and lake trophy in producers was not transferred in the food chain. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Ecology
volume
82
issue
4
pages
1078 - 1088
publisher
Ecological Society of America
external identifiers
  • scopus:0035064036
ISSN
0012-9658
DOI
10.1890/0012-9658(2001)082[1078:TEOLTO]2.0.CO;2
language
English
LU publication?
yes
id
dbf63d09-2405-4c5c-894e-140e6d94e1e3 (old id 146253)
alternative location
http://www.esajournals.org/esaonline/?request=get-document&issn=0012-9658&volume=082&issue=04&page=1078
date added to LUP
2007-06-27 08:42:51
date last changed
2018-01-07 08:50:46
@article{dbf63d09-2405-4c5c-894e-140e6d94e1e3,
  abstract     = {We investigated the influence of trophic status on the lipid content and polychlorinated biphenyl (PCB) concentrations in planktonic food webs from 19 lakes in southern Sweden. The lipid content in phytoplankton (10-45 mum), microzooplankton (45-150 mum) and large macrozooplankton (>500 mum) was negatively related to the total phosphorus (Tot-P) concentration in lakes. The lipid content in macrozooplankton (>150 Gem) and young-of-the-year roach (Rutilus rutilus) was not related to Tot-P in lakes. On a dry mass basis (ng/g dry mass), the sum of PCB concentrations in phytoplankton and microzooplankton was negatively related to Tot-P in lakes. Thus, the PCB concentrations in phytoplankton and microzooplankton were explained by the decreasing lipid content of these fractions with increasing trophic status of lakes; and when normalized to lipid content (ng/g extractable lipid) we found no differences in PCB concentrations among lakes. We conclude that the lipid content of phytoplankton increased with increased nutrient stress, explaining the negative relationship between lake trophy and phytoplankton organochlorine (OC) concentrations on a dry mass basis. The relationship found between lipids and lake trophy in producers was not transferred in the food chain.},
  author       = {Berglund, Olof and Larsson, Per and Ewald, Göran and Okla, Lennart},
  issn         = {0012-9658},
  language     = {eng},
  number       = {4},
  pages        = {1078--1088},
  publisher    = {Ecological Society of America},
  series       = {Ecology},
  title        = {The effect of lake trophy on lipid content and PCB concentrations in planktonic food webs},
  url          = {http://dx.doi.org/10.1890/0012-9658(2001)082[1078:TEOLTO]2.0.CO;2},
  volume       = {82},
  year         = {2001},
}