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Table of Contents <br />BACKGROUND.......................................................................................................................... ............................... 3 <br />POPULATIONECOLOGY .............................................................................................................. ............................... 3 <br />LeastTern Population Ecology ............................................................................................ ............................... 3 <br />Piping Plover Population Ecology ....................................................................................... ............................... 3 <br />PLATTE RIVER SYSTEM LEAST TERNS AND PIPING PLOVERS ..................................................... ............................... 4 <br />DATA / METHODS ...................................................................................................................... ............................... 5 <br />LEAST TERN AND PIPING PLOVER CENSUS INFORMATION .......................................................... <br />............................... 5 <br />CensusMethodology ............................................................................................................ <br />............................... S <br />Productivity (Number of Fledged Young and Fledging Rate) <br />........................................................... ............................... 7 <br />BREEDING POPULATION STRUCTURE ......................................................................................... <br />............................... 7 <br />Least Tern Breeding Population Structure ........................................................................... <br />............................... 7 <br />Piping Plover Breeding Population Structure ...................................................................... <br />............................... 7 <br />NESTINGBIOLOGY ..................................................................................................................... <br />............................... 8 <br />LeastTern Nesting Biology .................................................................................................. <br />............................... 8 <br />PipingPlover Nesting Biology ............................................................................................. <br />............................... 8 <br />FORAGINGECOLOGY ................................................................................................................. <br />............................... 8 <br />LeastTern Foraging Ecology ............................................................................................... <br />............................... 8 <br />PreySpecies ....................................................................................................................................... <br />............................... 9 <br />ForagingMovements ......................................................................................................................... <br />............................... 9 <br />PipingPlover Foraging Ecology ......................................................................................... <br />............................... 9 <br />PreySpecies ..................................................................................................................................... <br />............................... 10 <br />ForagingMovements ....................................................................................................................... <br />............................... 10 <br />MORTALITY/ NEST SUCCESS ................................................................................................... <br />............................... 10 <br />LeastTern Mortality .......................................................................................................... <br />............................... 10 <br />Riverine........................................................................................................................................... <br />............................... 1 I <br />PipingPlover Mortality ..................................................................................................... <br />............................... 12 <br />Riverine........................................................................................................................................... <br />............................... 12 <br />Artificialislands ............................................................................................................................... <br />............................... 12 <br />HABITATCHARACTERISTICS .................................................................................................... <br />............................... 12 <br />VegetativeCover ................................................................................................................ <br />............................... 12 <br />Elevation............................................................................................................................ <br />............................... 13 <br />Flow/ Discharge, relative to sandbar areas ...................................................................... <br />............................... 13 <br />ChannelWidth .................................................................................................................... <br />............................... 14 <br />Off - Channel Nest Sites ( Sandpits) ...................................................................................... <br />............................... 14 <br />ManagedSandpits ............................................................................................................................ <br />............................... 14 <br />Proximityto river ............................................................................................................................. <br />............................... 14 <br />Size.................................................................................................................................................. <br />............................... 14 <br />Distance and density of tree and brush cover ................................................................................... <br />............................... 14 <br />Isolation........................................................................................................................................... <br />............................... 14 <br />Habitatuse ......................................................................................................................... <br />............................... 14 <br />HABITAT CONDITIONS OF THE STUDY AREA ........................................................................... <br />............................... 15 <br />HISTORIC DATA NOT BEING COLLECTED DURING THE PROGRAM ..................... .............................15 <br />DATAGAPS/PROTOCOLS ...................................................................................................... .............................15 <br />LITERATURE CITED FOR LEAST TERN AND PIPING PLOVER SECTION ............. ............................... 17 <br />APPENDIX A. INFORMATION AVAILABLE ............................................................................... ............................... 21 <br />MODELS..................................................................................................................................... ............................... 4 <br />Draft Baseline Report, July 2002 4 -2 <br />