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Use of Thresholds in Landscape Assessments

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Abstract:Identification and use of thresholds are potentially important additions to interpretations of ecological monitoring data. However, there are a number of issues related to defining and using thresholds in interpreting ecological data. Most of these issues center around the paucity of long-term data to establish thresholds or phase transitions in important ecological functions, as well as the fact that ecosystems and their associated processes change over time. In this presentation, we discuss issues related to the establishment of ecological thresholds.

Recent development in landscape assessment approaches provides a way to evaluate ecological conditions where both arbitrary and ecosystem-based thresholds are used. In this presentation, we demonstrate these approaches through case studies from the eastern United States. The approach permits an extension of thresholds developed for streams to the broader watershed or landscape context.

Although this work was reviewed by EPA and approved for publication, it may not necessarily reflect official Agency policy.
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Citation:Jones, K. B., J. D. Wickham, and A. C. Neale. Use of Thresholds in Landscape Assessments. Presented at Making the Linkages Through the Use of Environmental Indicators A Regional/State/Tribal and Office of Research and Development Science Topic Workshop, Kansas City, MO, May 17-20, 2004.
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Contact: Mary P. O'Bryant - (919)-541-4871 or obriant.mary@epa.gov
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Division: Office of the Director
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Branch: Immediate Office
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Product Type: Abstrct/Oral
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Presented: 05/17/2004
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Related Entries:
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Bullet Item Development of Landscape Indicators for Use in Regional Ecological Risk Assessments
spacer Relationship Reason:   A Project of the Product
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Last Updated on Monday, October 22, 2007
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