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Eurasian watermilfoil (Myriophyllum spicatum L.) has become a nuisance plant species in North America. In recent years, it has become increasingly abundant in the Upper Mississippi River System (UMRS) and at some locations has regularly colonized areas which had previously hosted wild celery (Vallisneria americana Michx.), an important waterfowl food species. In summer 1993, initial efforts were undertaken to understand the environmental requisites of Myriophyllum in the UMRS. To accomplish this, a sampling grid was established within a Myriophyllum bed in Pool 7 near La Crosse, Wisconsin. Transects were spaced at 18.3-m (60-ft) intervals, with sample sites 9.15 m (30 ft) apart on transects. In total, 164 sites...
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The Environmental Management Technical Center hosted the first Upper Midwest Gap Analysis Workshop to initiate the coordination and implementation of Gap Analysis in the states of Minnesota, Michigan, and Wisconsin. Presently, Gap Analysis projects are being completed on a state-by-state basis, depending on level of interest and need by each state. Because Gap Analysis provides a standardized method and format, as state projects are completed the data can be edge-matched with adjacent states to reveal actual patterns of biodiversity at scales relevant to both the magnitude of present-day changes and the multiple levels of biological organization. Gap Analysis products are being used by state and local governments,...
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