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Batchawana Bay, Lake Superior: Impacts of Water Level Fluctuations on Wetland Vegetation

Patricia Chow-Fraser;Jon Midwood
Development of regulation plan performance indicators describing water-level regime impacts on emergent vegetation and submergent aquatic vegetation (SAV) in Batchawana Bay, Lake Superior, Ontario. The performance indicator is the change in total surface area of emergent vegetation and SAV for water levels ranging between 177.0 and 185.5 m. Coastal wetland along the north-eastern shoreline of Lake Superior occur in protected embayments. Due to high wind and wave action winter ice scour, these wetlands do not naturally contain dense stands of vegetation. Batchawana Bay contains some the largest wetlands of this type and serves as valuable spawning and nursery habitat for many fishes. Performance indicators developed using algorithms developed by Wei and Chow-Fraser (2008) and field data collected in 2010.
Ecosystem PI 05: Wetland Vegetation, Batchawana Bay
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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
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Coping Zones