Some thoughts on using a landscape framework to address cumulative impacts on wetland food chain support |
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Authors: | Jeffrey M Klopatek |
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Institution: | (1) Department of Botany, Arizona State University, 85287 Tempe, Arizona, USA |
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Abstract: | Problems of using food chain support as a functional attribute of a wetland are discussed. It is suggested that primary production may not be the metric that best evaluates food chain support. Environmental constructs of the wetland and resultant habitat variables appear to yield more information on life-support functions. A landscape-oriented approach is derived to separate hierarchically the wet-lands into ecological regions and landscape elements. This classification scheme allows for predetermination of environmental constraints and the possible natural limits of wetland food chain support. It is proposed that models derived from spatial location theory be used to determine the movement of animals from wetland patches experiencing impacts on food chain support. Patch size, distance between patches, habitat diversity, and environmental constraints are incorporated in these models. |
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Keywords: | Landscape ecology Food chain and webs Spatial scale and location Wetlands Cumulative impacts |
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