Extent of Sedge-Grass Meadow in a Lake Michigan Drowned River Mouth Wetland Dictated by Topography and Lake Level
نویسندگان
چکیده
Water-level fluctuations are critical in maintaining diversity of plant communities Great Lakes wetlands. Sedge-grass meadows especially sensitive to such fluctuations. We conducted vegetation sampling a sedge-grass dominated Lake Michigan drowned river mouth wetland 1995, 2002, and 2010 following high lake levels 1986 1997. also photointerpretation studies 16 years dating back 1965 include responses 1952 1974. Topographic data were collected assess their influence on areal extent meadow. Dominant species short emergent submersed/floating changed with water availability from 1995 extreme low 2002 2010. meadow was by Calamagrostis canadensis Carex stricta all sampled, but Importance Values differed among partly due newly exposed areas. Photointerpretation showed significant relation between percent summer level, as well the number since an level. From topographic map created, we calculated cumulative area above each 0.2-m contour determine dewatered select levels. When compared those years, relative changes both predicted land surface demonstrated that accuracy level predictor is dependent topography. Our results regarding relations plant-community response hydrology applicable other
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ژورنال
عنوان ژورنال: Wetlands
سال: 2022
ISSN: ['0277-5212', '1943-6246']
DOI: https://doi.org/10.1007/s13157-022-01534-w