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Arcadia Marsh, Lake Michigan: Impacts of Water Level Fluctuations on Wetland Vegetation
- Douglas Wilcox;
- Development of regulation plan performance indicators describing water-level regime impacts on wetland meadow marsh community in Arcadia Marsh, Lake Michigan. The performance indicator is the wetland-specific surface area estimate of meadow marsh vegetation (hectares) in Arcadia Marsh. Meadow marsh vegetation develops between the maximum long-term high water level and the long-term mean. Meadow marsh plant communities are highly diverse and often occur within a relatively narrow hydrologic range in comparison to other wetland vegetation communities. The presence of meadow marsh is a positive indicator of wetland plant biodiversity and natural water-level regimes. Changes in the surface area (percent) of meadow marsh were determined by photointerpretation of imagery over a span of 17 years (1954-2010). Arcadia marsh is representative of many drowned river mouth wetlands along the north-eastern shore of Lake Michigan.
- Arcadia Lake Ecosystem
- 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