2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/23/2018 | 10:00 AM - 10:15 AM | COMBINING COMMUNITY, TOXICITY, AND SEDIMENT CHEMISTRY ASSESSMENTS FOR BENTHOS EVALUATIONS AT TWO LAKE MICHIGAN AREAS OF CONCERN | 420 B
COMBINING COMMUNITY, TOXICITY, AND SEDIMENT CHEMISTRY ASSESSMENTS FOR BENTHOS EVALUATIONS AT TWO LAKE MICHIGAN AREAS OF CONCERN
In 2014, the U.S. Geological Survey (USGS) sampled communities of benthic invertebrates (benthos) at non-wadable sites in Great Lakes Areas of Concern (AOCs) and non-AOCs along Wisconsin’s Lake Michigan shoreline. Communities were assessed using relative abundance of taxa and biological metrics such as richness, diversity, and Index of Biotic Integrity. In fall 2016, the USGS collected composite samples of surficial sediment from 19 sites: 3 at the Sheboygan River AOC, 8 at the Milwaukee Estuary AOC, and 8 at non-AOC sites. Sediment was evaluated for toxicity (midge and amphipod) and chemistry (PCBs, polycyclic aromatic hydrocarbons [PAHs], metals, acid-volatile sulfide [AVS], and organic carbon). For 6 sites sampled in both 2014 and 2016, biological metrics for benthos correlated with metrics for toxicity and chemistry of sediments. Richness and diversity correlated negatively with bioavailable metals (normalized to AVS and organic carbon). Richness of combined (dredge and artificial substrate) community samples correlated negatively with sediment PAHs, bioavailable metals, and toxicity hazard rankings. These associations among benthic community metrics, toxicity tests, and sediment chemistry provide a robust characterization of the AOC sites with completed and ongoing remediation efforts.
- Invertebrate
- Sediment
- Bioassessment
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Presenters/Authors
Barbara Scudder Eikenberry
(), U.S. Geological Survey, beikenberry@usgs.gov;
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John Besser
(), U.S. Geological Survey, jbesser@usgs.gov;
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Hayley Olds
(), U.S. Geological Survey, htolds@usgs.gov;
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Rebecca Dorman
(), U.S. Geological Survey, rdorman@usgs.gov ;
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