Abstract
This article updates the status of Nebraska’s remaining natural palustrine wetlands in the rainwater basin area and relates the density of semipermanent wetlands to avian cholera (Pasteurella multocida) epizootics. Comparison of 1965 to 1981 data indicates only 445 (11,436 ha) of 668 (12,357 ha) temporary, seasonal, and semipermanent wetlands (excavated or impounded wetlands excluded) remain in the rainwater basin area. We estimate that these 445 basins represent 11% of the original number of natural wetland basins and 30% of the original area. Our data suggest this loss of wetland habitat contributes to the disease by concentrating migrating waterfowl on fewer wetlands. Avian cholera epizootics were inversely related to semipermanent wetland basin densities.
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