Persistent organic pollutants in river food webs: influence of trophic position and degree of heterotrophy
(2005) In Canadian Journal of Fisheries and Aquatic Sciences 62(9). p.2021-2032- Abstract
- We investigated how the degree of autotrophy/heterotrophy and organism trophic position influenced the bioaccumulation of polychlorinated biphenyls (PCBs) in 10 benthic river food webs consisting of terrestrial detritus, periphyton, invertebrates, and age-0 brown trout (Salmo trutta) in southern Sweden. Concentrations of PCBs increased with trophic position, estimated from delta(15)N and delta(13)C, on a dry weight basis (ng center dot g(-1) dry weight) but not on a lipid weight basis (ng center dot g(-1) lipid). PCB biomagnification factors between the first and second trophic levels (invertebrates/ periphyton and invertebrates/detritus) ranged between 0.3 and 2.3 and between the second and third levels (trout/invertebrates) between 0.3... (More)
- We investigated how the degree of autotrophy/heterotrophy and organism trophic position influenced the bioaccumulation of polychlorinated biphenyls (PCBs) in 10 benthic river food webs consisting of terrestrial detritus, periphyton, invertebrates, and age-0 brown trout (Salmo trutta) in southern Sweden. Concentrations of PCBs increased with trophic position, estimated from delta(15)N and delta(13)C, on a dry weight basis (ng center dot g(-1) dry weight) but not on a lipid weight basis (ng center dot g(-1) lipid). PCB biomagnification factors between the first and second trophic levels (invertebrates/ periphyton and invertebrates/detritus) ranged between 0.3 and 2.3 and between the second and third levels (trout/invertebrates) between 0.3 and 2.0 on a lipid weight basis. The mean proportion of carbon ultimately derived from terrestrial sources, alpha, was 0.82 +/- 0.19 for invertebrates and 0.67 +/- 0.28 for trout. Contrary to our hypothesis, PCB concentrations in trout were positively related to alpha (r(2) = 0.58-0.77, p < 0.05). As alpha and the periphyton density (g C center dot m(-2)) in the rivers was positively related (r(2) = 0.88, p < 0.01), we propose that this relationship was due to an increased retention and exposure of PCBs to trout in rivers with low grazing pressure and high periphyton density. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/146460
- author
- Berglund, Olof LU ; Nyström, Per LU and Larsson, Per LU
- organization
- publishing date
- 2005
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Canadian Journal of Fisheries and Aquatic Sciences
- volume
- 62
- issue
- 9
- pages
- 2021 - 2032
- publisher
- Canadian Science Publishing, NRC Research Press
- external identifiers
-
- wos:000231889800009
- scopus:29144536751
- ISSN
- 1205-7533
- DOI
- 10.1139/F05-115
- language
- English
- LU publication?
- yes
- id
- 7b8ef9e9-f09f-4597-8d42-e0fc0290da71 (old id 146460)
- alternative location
- http://pubs.nrc-cnrc.gc.ca/cgi-bin/rp/rp2_tocs_e?cjfas_cjfas9-05_62
- date added to LUP
- 2016-04-01 12:07:09
- date last changed
- 2024-04-23 04:31:03
@article{7b8ef9e9-f09f-4597-8d42-e0fc0290da71,
abstract = {{We investigated how the degree of autotrophy/heterotrophy and organism trophic position influenced the bioaccumulation of polychlorinated biphenyls (PCBs) in 10 benthic river food webs consisting of terrestrial detritus, periphyton, invertebrates, and age-0 brown trout (Salmo trutta) in southern Sweden. Concentrations of PCBs increased with trophic position, estimated from delta(15)N and delta(13)C, on a dry weight basis (ng center dot g(-1) dry weight) but not on a lipid weight basis (ng center dot g(-1) lipid). PCB biomagnification factors between the first and second trophic levels (invertebrates/ periphyton and invertebrates/detritus) ranged between 0.3 and 2.3 and between the second and third levels (trout/invertebrates) between 0.3 and 2.0 on a lipid weight basis. The mean proportion of carbon ultimately derived from terrestrial sources, alpha, was 0.82 +/- 0.19 for invertebrates and 0.67 +/- 0.28 for trout. Contrary to our hypothesis, PCB concentrations in trout were positively related to alpha (r(2) = 0.58-0.77, p < 0.05). As alpha and the periphyton density (g C center dot m(-2)) in the rivers was positively related (r(2) = 0.88, p < 0.01), we propose that this relationship was due to an increased retention and exposure of PCBs to trout in rivers with low grazing pressure and high periphyton density.}},
author = {{Berglund, Olof and Nyström, Per and Larsson, Per}},
issn = {{1205-7533}},
language = {{eng}},
number = {{9}},
pages = {{2021--2032}},
publisher = {{Canadian Science Publishing, NRC Research Press}},
series = {{Canadian Journal of Fisheries and Aquatic Sciences}},
title = {{Persistent organic pollutants in river food webs: influence of trophic position and degree of heterotrophy}},
url = {{https://lup.lub.lu.se/search/files/2789317/625093.pdf}},
doi = {{10.1139/F05-115}},
volume = {{62}},
year = {{2005}},
}