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A Landscape Ecology Assessment of the Tensas River Basin
Authors:Daniel T Heggem  Curtis M Edmonds  Anne C Neale  Lee Bice  K Bruce Jones
Institution:(1) National Exposure Research Laboratory, Landscape Ecology Branch, U.S. Environmental Protection Agency, P.O. Box 93478, Las Vegas, Nevada 89193-3478, USA;(2) National Exposure Research Laboratory, Landscape Ecology Branch, U.S. Environmental Protection Agency, P.O. Box 93478, Las Vegas, Nevada 89193-3478, USA
Abstract:A group of landscape ecological indicators were applied to biophysical data masked to the Tensas River Basin. The indicators were used to identify and prioritize sources of nutrients in a Mississippi/Atchafalaya River System sub-basin. Remotely sensed data were used for change detection assessment. With these methods, we were able to look at land use practices over the past twenty years in the Tensas River Basin of Louisiana. A simple land use classification was applied to multispectral scanner (MSS) data from 1972 and 1991. The landscape analysis methods described in this paper will show how to use these methods to assess the impact of human land use practices that are being implemented to improve environmental quality. Landscape assessment methods can be used as a simple, timely, cost effective approach for monitoring, targeting, and modeling ecosystem health in watersheds. Although this study was conducted in the southeast, the methods described in this paper may be applicable to western landscapes.
Keywords:landscape assessment  landscape indicators  remote sensing  ecological change detection
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