NDLI: Thirty-Year Time Series of PCB Concentrations in a Small Invertivorous Fish (Notropis Hudsonius): An Examination of Post-1990 Trajectory Shifts in the Lower Great Lakes

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Thirty-Year Time Series of PCB Concentrations in a Small Invertivorous Fish (Notropis Hudsonius): An Examination of Post-1990 Trajectory Shifts in the Lower Great Lakes

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Thirty-Year Time Series of PCB Concentrations in a Small Invertivorous Fish (Notropis Hudsonius): An Examination of Post-1990 Trajectory Shifts in the Lower Great Lakes

Content Provider	Springer Nature Link
Author	French, Todd D. Petro, Steve Reiner, Eric J. Bhavsar, Satyendra P. Jackson, Donald A.
Copyright Year	2011
Abstract	The production and use of polychlorinated biphenyls (PCBs) have been restricted in North America since the 1970s; yet, PCBs are still detected in all components of the Great Lakes ecosystems. Our objective was to determine how total PCB (PCBT) concentrations in spottail shiner (Notropis hudsonius) changed over the period 1975–2007 in the lower Great Lakes. Trends were best described by three basic models: (1) piecewise models where concentrations followed a decreasing trend before the break point (T) and an increasing trend post-T (Lake St. Clair, eastern Lake Erie, and upper Niagara River); (2) piecewise models where concentrations decreased both pre- and post-T but where the rate of decline post-T was less than that pre-T (western Lake Erie and Niagara River’s Tonawanda Channel); and (3) linear models where concentrations declined at a constant rate across the entire temporal range (lower Niagara River and western Lake Ontario). Piecewise models best described the trends in shallow areas that are susceptible to full water-column mixing whereas constant-slope models best described trends in deeper areas. For piecewise models, T typically occurred during the years 1988–1992. Two events coincided with this timing: (1) a sustained shift towards warming summer temperatures and (2) the proliferation of dreissenid mussels (Dreissena spp.). The weight-of-evidence suggests that the dreissenid invasions were a more likely driving factor behind the observed trends.
Starting Page	415
Ending Page	429
Page Count	15
File Format	PDF
ISSN	14329840
Journal	Ecosystems
Volume Number	14
Issue Number	3
e-ISSN	14350629
Language	English
Publisher	Springer-Verlag
Publisher Date	2011-03-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Great Lakes Lake St. Clair Niagara River Lake Ontario Lake Erie polychlorinated biphenyls environmental change climate change invasive species dreissenids Dreissena Notropis hudsonius Environmental Management Plant Sciences Geoecology/Natural Processes Zoology Ecology Nature Conservation
Content Type	Text
Resource Type	Article
Subject	Ecology Environmental Chemistry Ecology, Evolution, Behavior and Systematics

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Thirty-Year Time Series of PCB Concentrations in a Small Invertivorous Fish (Notropis Hudsonius): An Examination of Post-1990 Trajectory Shifts in the Lower Great Lakes

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Thirty-Year Time Series of PCB Concentrations in a Small Invertivorous Fish (Notropis Hudsonius): An Examination of Post-1990 Trajectory Shifts in the Lower Great Lakes