Vegetative Response In Michigans Coastal Wetlands To Great Lakes Water Level Fluctuations A Report Submitted To Michigan Natural Features Inventory April 4 1997
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Author | : Leah Delia Minc |
Publisher | : |
Total Pages | : 135 |
Release | : 1997 |
Genre | : Water levels |
ISBN | : |
Author | : United States. Office of Water Research and Technology |
Publisher | : |
Total Pages | : 702 |
Release | : 1979 |
Genre | : Water levels |
ISBN | : |
Author | : Donald Curtis Williams |
Publisher | : |
Total Pages | : 404 |
Release | : 1995 |
Genre | : |
ISBN | : |
Author | : Eugene Jaworski |
Publisher | : |
Total Pages | : 351 |
Release | : 1979 |
Genre | : Coastal zone management |
ISBN | : |
Author | : Leah Delia Minc |
Publisher | : |
Total Pages | : 72 |
Release | : 1997 |
Genre | : Wetland plants |
ISBN | : |
Author | : Walter G. Duffy |
Publisher | : |
Total Pages | : 160 |
Release | : 1987 |
Genre | : Estuarine ecology |
ISBN | : |
Author | : Christin Beth Frieswyk |
Publisher | : |
Total Pages | : 198 |
Release | : 2005 |
Genre | : |
ISBN | : |
Author | : Mirela G. Tulbure |
Publisher | : |
Total Pages | : 11 |
Release | : 2007 |
Genre | : Invasive plants |
ISBN | : |
Great Lakes coastal wetlands are subject to water level fluctuations that promote the maintenance of coastal wetlands. Point au Sauble, a Green Bay coastal wetland, was an open water lagoon as of 1999, but became entirely vegetated as Lake Michigan experienced a prolonged period of below-average water levels. Repeat visits in 2001 and 2004 documented a dramatic change in emergent wetland vegetation communities. In 2001 non-native Phragmites and Typha were present but their cover was sparse; in 2004 half of the transect was covered by a 3 m tall, invasive Phragmites and non-native Typha community. Percent similarity between plant species present in 2001 versus 2004 was approximately 19% (Jaccard's coefficient), indicating dramatic changes in species composition that took place in only 3 years. The height of the dominant herbaceous plants and coverage by invasive species were significantly higher in 2004 than they were in 2001. However, floristic quality index and coefficient of conservatism were greater in 2004 than 2001. Cover by plant litter did not differ between 2001 and 2004. The prolonged period of below-average water levels between 1999 and early 2004 exposed unvegetated lagoon bottoms as mudflats, which provided substrate for new plant colonization and created conditions conducive to colonization by invasive taxa. PCR/RFLP analysis revealed that Phragmites from Point au Sauble belongs to the more aggressive, introduced genotype. It displaces native vegetation and is tolerant of a wide range of water depth. Therefore it may disrupt the natural cycles of vegetation replacement that occur under native plant communities in healthy Great Lakes coastal wetlands.
Author | : |
Publisher | : |
Total Pages | : |
Release | : 2006 |
Genre | : Wetland animals |
ISBN | : |
Author | : National Research Council |
Publisher | : National Academies Press |
Total Pages | : 449 |
Release | : 2002-10-10 |
Genre | : Science |
ISBN | : 0309082951 |
The Clean Water Act (CWA) requires that wetlands be protected from degradation because of their important ecological functions including maintenance of high water quality and provision of fish and wildlife habitat. However, this protection generally does not encompass riparian areasâ€"the lands bordering rivers and lakesâ€"even though they often provide the same functions as wetlands. Growing recognition of the similarities in wetland and riparian area functioning and the differences in their legal protection led the NRC in 1999 to undertake a study of riparian areas, which has culminated in Riparian Areas: Functioning and Strategies for Management. The report is intended to heighten awareness of riparian areas commensurate with their ecological and societal values. The primary conclusion is that, because riparian areas perform a disproportionate number of biological and physical functions on a unit area basis, restoration of riparian functions along America's waterbodies should be a national goal.