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Georgian Bay, Lake Huron: Impacts of Water Level Fluctuations on Wetlands
- Development of plan performance indicators describing water-level impacts on wetland connectivity and submerged aquatic vegetation (SAV) potential in eastern Georgian Bay. Two performance indicator metrics were developed: wetland connectivity is the percentage of coastal wetland area hydrologically connected to Georgian Bay as a function of water level during spring and fall spawning periods, which provides information on the amount of fish habitat in eastern Georgian Bay (between Severn Sound and Key River) that is inaccessible to fish for any given water level between 162.0 m and 176.0 m; SAV potential is the percentage of wetland area not transformed to a non-diverse aquatic vegetation community as a function of hydrologic connectivity to Georgian Bay. Georgian Bay coastal wetlands are unique and provide critical spawning and nursery habitats for the Lake Huron fish community. The McMaster wetland inventory was updated and augmented with elevation data collected in 2009 and 2010.
- Ecosystem PI 08: Wetland Connectivity, Georgian Bay
- Ecosystem PI 09: Submerged Aquatic Vegetation, Georgian Bay
- Water-level-induced changes to Georgian Bay wetland fish communities
- Georgian Bay Wetland Field Survey Program
- Additional Data and Information
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- Supporting Content
- Main Topics
- - Lake Superior Regulation
- Questions We Asked
- - What constitutes improved plan performance?
- - Does the plan reduce environmental impacts?
- 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