2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/23/2018 | 9:00 AM - 9:15 AM | MACROINVERTEBRATE ASSEMBLAGE RESPONSE TO CONTAMINATED SEDIMENT REMEDIATION IN A LACUSTUARY SYSTEM | 420 B
MACROINVERTEBRATE ASSEMBLAGE RESPONSE TO CONTAMINATED SEDIMENT REMEDIATION IN A LACUSTUARY SYSTEM
Degradation of benthos is a common beneficial use impairments (BUI) at Great Lakes Areas of Concern (AOCs), including the Maumee River, northeastern Ohio. Ottawa River is part of the Maumee River AOC, and has been altered by urban and industrial activities. Contaminated sediment was dredged from the Lower Ottawa River Lacustuary (LORL) in 2010. Lacustuaries are transition zones where rivers flow into lakes. Macroinvertebrate were collected with multi-plate samplers from remediation and control stations before (2007 and 2009) and after dredging (2010 to 2013 and 2015). Before-After Control-Impact analysis did not detect differences in Lacustuary Invertebrate Community Index (LICI) scores or individual metrics before and after the remediation between the control and remediation stations. A higher percent abundance of collector-gatherers at remediation stations than at control stations was detected across all years. The LICI scores along the LORL fluctuated between Very Poor and Poor status. The LORL remediation has, thus far, not had a positive or negative impact on the macroinvertebrate assemblages based on the LICI scores. Further efforts, such as removal of combined sewer overflows and restoration of physical habitat, may be needed to achieve the BUI restoration goal.
- Great Lakes Restoration Initiative
- Area of Concern
- Remediation
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Presenters/Authors
Ken Fritz
(), US Environmental Protection Agency, Office of Research and Development, fritz.ken@epa.gov;
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Jim Lazorchak
(), United States Environmental Protection Agency, Office of Research and Development, Center for Environmental Measurement and Modeling, Cincinnati, OH 45268, lazorchak.jim@epa.gov;
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Marc Mills
(), United States Environmental Protection Agency, mills.marc@epa.gov;
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William Thoeny
(), Pegasus Technical Services, thoeny.william@epa.gov;
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