2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/24/2018 | 9:30 AM - 9:45 AM | THE AFTERMATH OF DREISSENID INVASIONS ON STREAM BENTHIC MACROINVERTEBRATE AND FISH COMMUNITIES | 410 A
THE AFTERMATH OF DREISSENID INVASIONS ON STREAM BENTHIC MACROINVERTEBRATE AND FISH COMMUNITIES
Since their Great Lakes invasion, dreissenid mussels have impacted freshwater systems by altering nutrient cycling and community structure of macroinvertebrates and fish; however, most research has focused on the effects of living organisms. We investigated the impacts of dreissenid shells on fish and benthic macroinvertebrate communities in southeastern Michigan rivers. In the Rouge and Huron Rivers, macroinvertebrate were assessed using EPA’s rapid bioassessment, and seining used to collect fish for an evaluation of community composition. Within each river we sampled 8 sites, 4 in invaded and 4 in uninvaded sections of each river, totaling 16 locations. The fish community was evaluated at all sites during spawning and post-spawning periods, and the invertebrate community was evaluated in late summer. We found no relation between dreissenid shell density and fish spawning in either river, however, centrarchids were more prevalent at uninvaded sites compared to invaded sites. Macroinvertebrate communities were more diverse, with higher richness and EPT taxa in non-invaded when compared to invaded sites. This research shows that the presence of dreissenid shells can alter invertebrate communities, potentially degrading fish spawning areas for centrarchids, indicating an overall decline in stream ecosystem health.
- Invertebrate
- Fish
- Biodiversity
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Presenters/Authors
Darrin Hunt
(), Wayne State University, eb5832@wayne.edu;
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Donna Kashian
(), Wayne State University, dkashian@wayne.edu;
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