scheme has resulted in increased fledging rates and, correspondingly, an increase in the population of the birds. The present hydrograph is very beneficial to the least tern and piping plover.
This investigation was conducted and completed by necessity in a short time. The study should be expanded for a longer duration; specifically the duration should be extended to include 1956- to present information. This investigation should be expanded to evaluate conditions of other sites in addition to the upstream conditions at Sioux City, Iowa, which this investigation emphasized. Also, additional procedures and analytical tools should be evaluated as to their usefulness.
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