An Assessment of Ecosystem Risks in the St. Croix National Scenic Riverway |
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Authors: | Robert B Wenger Hallett J Harris David S Devault |
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Institution: | (1) Environmental Science, University of Wisconsin-Green Bay, Green Bay, Wisconsin 54311, USA , US;(2) U.S. Fish and Wildlife Service, Ecological Services, 1 Federal Drive, Fort Snelling, Minnesota 55111, USA , US |
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Abstract: | The information needed for conducting the risk assessment was provided by the participants in a 2-day workshop. The invited
participants, who possessed knowledge of the St. Croix ecosystem, identified through a group-consensus process a list of stressors
and a list of ecosystem values. They then assigned numerical values to each stressor-ecosystem value pair that reflected the
degree to which the given stressor contributes to ecosystem risk as measured by the given ecosystem value. Based on this information,
the analytical portion of the methodology was then used to rank the ecosystem risks (stressors) when examined from several
different perspectives: immediate impact, time-duration, and management activities. Regardless of the perspective taken, riverway
development emerged as the most significant stressor. |
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Keywords: | : Environmental risks Assessment method Fuzzy set St Croix |
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