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Saginaw Bay, Lake Huron: Impacts of Water Level Fluctuations on Wetland Fish

Donald Uzarski;Matt Cooper, Brent Murry
Development of regulation plan performance indicators describing water-level regime impacts on wetland fish abundance and diversity in the inner and outer bulrush zone in Saginaw Bay, Lake Huron, Michigan. Four performance indicators were developed to describe changes in fish distribution, abundance, and diversity: 1) fish species richness in outer bulrush zone, 2) fish assemblage evenness in outer bulrush zone, 3) total fish abundance in the inner bulrush zone, and 4) fish species richness in the inner bulrush zone. Data used in the development of these performance indicator metrics were gathered from 200 to 2008 and consist of mean monthly spring an summer water levels ranging from 175.469 m to 176.529. Monthly ranges and variation in water levels, and rates of water level change relative to photoperiod cues affect the abundance, species richness, and evenness of fish in northern Great Lakes coastal wetlands.
Ecosystem PI 15: Fish Abundance and Diversity, Saginaw Bay
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?
View all 3 questions we asked
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
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Coping Zones