2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/24/2018 | 2:00 PM - 2:15 PM | A DECADAL ASSESSMENT OF ANTHROPOGENIC IMPACTS TO STREAMS OF NORTHERN MICHIGAN | 420 A
A DECADAL ASSESSMENT OF ANTHROPOGENIC IMPACTS TO STREAMS OF NORTHERN MICHIGAN
Human actions at the landscape scale are a threat to the ecological integrity of rivers. Some watersheds of Marquette County, Michigan are relatively pristine while others have a long history of logging, mining, and road construction, which have affected the stream habitat, water quality, and biota. These watersheds provide an opportunity to understand long-term anthropogenic stressors. We implemented an annual water-quality monitoring program for 26 sites beginning in 2007 that encompasses a range of anthropogenic influences, which includes data before and during construction and operation of a nearby nickel mine. We evaluated macroinvertebrate community composition, nutrients, water quality parameters, metal concentrations, and habitat conditions at all sites. A habitat assessment provided perspective on changes to the system indicating declining habitat quality over 10 years, while the macroinvertebrate data was highly variable. Site-specific differences in sensitive taxa displayed larger inter-annual variation at sites impacted by construction than isolated sites, potentially due to increased siltation. This study demonstrates that long-term data sets can differentiate between natural variation and anthropogenic changes in stream ecosystems, and can be used to pin-point specific stressors.
- Bioindicators
- Invertebrate
- Habitat
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Presenters/Authors
Donna Kashian
(), Wayne State University, dkashian@wayne.edu;
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Ashley Burtner
(), Cooperative Institute for Great Lakes Research, aburtner@umich.edu;
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Corey Krabbenhoft
(), University of Minnesota, krabb012@umn.edu;
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