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Abstract
Using GIS to Inventory Waterbird Habitat Within a Wetland ComplexTrack: Forestry, Wildlife, and Fisheries Management
Author(s): Ellen A. Ehrhardt
In order to begin to assess the influence of the spring flood hydrology on habitat dynamics on the Missouri River floodplain, we studied spatial and temporal distributions of waterbirds in relation to distribution of water and shallow water habitat (1999). A grid of the distribution of shallow water and water coverage was developed with ArcInfo and the ArcGrid extension. Based on two elevational control points on the river, a water surface with a constant slope was determined by iterative COSTDISTANCE calculations. Water coverage was then estimated by intersecting the assumed water surface with the topography. The CUTFILL function was used to estimate shallow habitat. The LATTICEPOINTS function was used to gather test points to evaluate the model. Area of shallow habitat and other morphometric measures were output as potential explanatory variables in the statistical analysis of waterbird distribution.
Ellen A. Ehrhardt
State of Missouri
Policy Coordination
2901 West Truman Blvd.
Jefferson City, MO 65102
USA
Phone: 573-751-4115
Fax: 573-526-4495
E-mail: ehrhae@mail.conservation.state.mo.us