J. Great Lakes Res. 29(2):332–354 Internat. Assoc. Great Lakes Res., 2003 Assessing Trends in Organochlorine Concentrations in Lake Winnipeg Fish Following the 1997 Red River Flood
ABSTRACT. As we move toward the virtual elimination of persistent organic pollutants (POPs) in the environment our understanding of how short-term variability affects long-term trends of POPs in natural populations will become increasingly more important. In this study we report short-term trends in...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.457.8171 2023-05-15T15:47:18+02:00 J. Great Lakes Res. 29(2):332–354 Internat. Assoc. Great Lakes Res., 2003 Assessing Trends in Organochlorine Concentrations in Lake Winnipeg Fish Following the 1997 Red River Flood A. Robin Stewart Gary A. Stern W. Lyle Lockhart Karen A. Kidd Alex G. Salki Michael P. Stainton Krystyna Koczanski G. Bruno Rosenberg Dan A. Savoie Brian N. Billeck Paul Wilkinson Derek C. G. Muir The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.457.8171 http://wwwrcamnl.wr.usgs.gov/tracel/references/pdf/JGreatLakesRes_v29n2p332.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.457.8171 http://wwwrcamnl.wr.usgs.gov/tracel/references/pdf/JGreatLakesRes_v29n2p332.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://wwwrcamnl.wr.usgs.gov/tracel/references/pdf/JGreatLakesRes_v29n2p332.pdf text ftciteseerx 2016-01-08T06:19:02Z ABSTRACT. As we move toward the virtual elimination of persistent organic pollutants (POPs) in the environment our understanding of how short-term variability affects long-term trends of POPs in natural populations will become increasingly more important. In this study we report short-term trends in organochlorine (OC) levels in fish from Lake Winnipeg in the months and years following the 1997 100-year flood of the Red River ecosystem. Our goal was to understand the effects of an episodic event on OC levels in benthic and pelagic invertebrates and in fish. Despite elevated loading of OCs into the south basin of Lake Winnipeg during the flood there were no differences in OC levels of surface sediments or emergent mayflies. After adjusting for differences in lipid content and length among sample times, we did find significant increases in total DDT (∑DDT) and total polychlorinated biphenyl (∑PCB) post-flood (March 1999) in top predators including walleye and burbot. Significant increases were also observed in OC concentrations of zooplankton and yellow perch (> 2 fold in ∑PCB, ∑DDT, total chlordane (∑CHL), total chlorobenzenes (∑CBZ)) and walleye (1.4 fold ∑PCB) over a 2-month period in the summer follow-ing the flood. Analysis of specific congener patterns over time suggest that the major changes in fish OC levels pre- and post-flood did not appear to be linked to transport of new compounds into the Lake during the flood, but to species shifts within the plankton community. Our results indicate that short-term varia-tion (~2 months) in OC distributions within biota may be equal to or greater than those resulting from episodic events such as spring floods. INDEX WORDS: Bioaccumulation, PCB, DDT, floods, food webs. Text Burbot Unknown |
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ABSTRACT. As we move toward the virtual elimination of persistent organic pollutants (POPs) in the environment our understanding of how short-term variability affects long-term trends of POPs in natural populations will become increasingly more important. In this study we report short-term trends in organochlorine (OC) levels in fish from Lake Winnipeg in the months and years following the 1997 100-year flood of the Red River ecosystem. Our goal was to understand the effects of an episodic event on OC levels in benthic and pelagic invertebrates and in fish. Despite elevated loading of OCs into the south basin of Lake Winnipeg during the flood there were no differences in OC levels of surface sediments or emergent mayflies. After adjusting for differences in lipid content and length among sample times, we did find significant increases in total DDT (∑DDT) and total polychlorinated biphenyl (∑PCB) post-flood (March 1999) in top predators including walleye and burbot. Significant increases were also observed in OC concentrations of zooplankton and yellow perch (> 2 fold in ∑PCB, ∑DDT, total chlordane (∑CHL), total chlorobenzenes (∑CBZ)) and walleye (1.4 fold ∑PCB) over a 2-month period in the summer follow-ing the flood. Analysis of specific congener patterns over time suggest that the major changes in fish OC levels pre- and post-flood did not appear to be linked to transport of new compounds into the Lake during the flood, but to species shifts within the plankton community. Our results indicate that short-term varia-tion (~2 months) in OC distributions within biota may be equal to or greater than those resulting from episodic events such as spring floods. INDEX WORDS: Bioaccumulation, PCB, DDT, floods, food webs. |
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The Pennsylvania State University CiteSeerX Archives |
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author |
A. Robin Stewart Gary A. Stern W. Lyle Lockhart Karen A. Kidd Alex G. Salki Michael P. Stainton Krystyna Koczanski G. Bruno Rosenberg Dan A. Savoie Brian N. Billeck Paul Wilkinson Derek C. G. Muir |
spellingShingle |
A. Robin Stewart Gary A. Stern W. Lyle Lockhart Karen A. Kidd Alex G. Salki Michael P. Stainton Krystyna Koczanski G. Bruno Rosenberg Dan A. Savoie Brian N. Billeck Paul Wilkinson Derek C. G. Muir J. Great Lakes Res. 29(2):332–354 Internat. Assoc. Great Lakes Res., 2003 Assessing Trends in Organochlorine Concentrations in Lake Winnipeg Fish Following the 1997 Red River Flood |
author_facet |
A. Robin Stewart Gary A. Stern W. Lyle Lockhart Karen A. Kidd Alex G. Salki Michael P. Stainton Krystyna Koczanski G. Bruno Rosenberg Dan A. Savoie Brian N. Billeck Paul Wilkinson Derek C. G. Muir |
author_sort |
A. Robin Stewart |
title |
J. Great Lakes Res. 29(2):332–354 Internat. Assoc. Great Lakes Res., 2003 Assessing Trends in Organochlorine Concentrations in Lake Winnipeg Fish Following the 1997 Red River Flood |
title_short |
J. Great Lakes Res. 29(2):332–354 Internat. Assoc. Great Lakes Res., 2003 Assessing Trends in Organochlorine Concentrations in Lake Winnipeg Fish Following the 1997 Red River Flood |
title_full |
J. Great Lakes Res. 29(2):332–354 Internat. Assoc. Great Lakes Res., 2003 Assessing Trends in Organochlorine Concentrations in Lake Winnipeg Fish Following the 1997 Red River Flood |
title_fullStr |
J. Great Lakes Res. 29(2):332–354 Internat. Assoc. Great Lakes Res., 2003 Assessing Trends in Organochlorine Concentrations in Lake Winnipeg Fish Following the 1997 Red River Flood |
title_full_unstemmed |
J. Great Lakes Res. 29(2):332–354 Internat. Assoc. Great Lakes Res., 2003 Assessing Trends in Organochlorine Concentrations in Lake Winnipeg Fish Following the 1997 Red River Flood |
title_sort |
j. great lakes res. 29(2):332–354 internat. assoc. great lakes res., 2003 assessing trends in organochlorine concentrations in lake winnipeg fish following the 1997 red river flood |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.457.8171 http://wwwrcamnl.wr.usgs.gov/tracel/references/pdf/JGreatLakesRes_v29n2p332.pdf |
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Burbot |
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Burbot |
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http://wwwrcamnl.wr.usgs.gov/tracel/references/pdf/JGreatLakesRes_v29n2p332.pdf |
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http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.457.8171 http://wwwrcamnl.wr.usgs.gov/tracel/references/pdf/JGreatLakesRes_v29n2p332.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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