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Saginaw Bay, Les Cheneaux Islands Areas, Lake Huron: Impacts of Water Levels on Macroinvertebrate Communities

Donald Uzarski;Matt Cooper, Brent Murry
Development of regulation plan performance indicators describing water-level regime impacts on macroinvertebrate communities in Saginaw Bay wetlands and Les Cheneaux Island area bulrush wetlands, Lake Huron, Michigan. Three performance indicator metrics were developed: a macroinvertebrate abundance index and a macroinvertebrate diversity index based on taxon richness for Saginaw Bay wetlands, and species composition diversity in bulrush zones for the Les Cheneaux Islands area. Macroinvertebrates make up a large portion of the diets of may fish, amphibians, reptiles, and birds and often form critical linkages between primary production (plant growth), detrital energy supplies (dead plant and animal material), and higher trophic levels (the position an organism occupies in the food chain). These performance indicators were developed using macroinvertebrate data collected between 1997 and 2002 in northern Lake Huron.
Ecosystem PI 13: Macroinvertebrates, Saginaw Bay
Ecosystem PI 14: Macroinvertebrates, Les Cheneaux Islands
Water Levels Impacting Great Lakes Coastal Wetlands
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Supporting Content (Show)
Main Topics
Lake Superior Regulation
Questions We Asked
What constitutes improved plan performance?
Does the plan reduce environmental impacts?
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How vulnerable are interest groups to extremes?
Key Findings
Plan 2012 will be more robust and provide important benefits compared to Plan 77A
Plan 2012 performs similar to Plan 77A under 20th century NBS
Ecosystems Evaluation
Performance Indicators
View all 3 tasks
Coping Zones