USGS - Science for a Changing World

U.S. GEOLOGICAL SURVEY
Open-File Report 2005-1281

Water Level Management and Contaminant Exposure in Tree Swallows Nesting on the Upper Mississippi River


By Thomas Custer and Christine Custer

ABSTRACT

A study was initiated in 2000 to determine if tree swallow exposure to mercury and other contaminants increased after the 2001 Pool 8 water level drawdown. If true, then we would predict the mercury concentrations in tree swallows would be higher in 2002 than 2000 or 2001.

CONTENTS

Methods
Findings
Acknowledgments

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For additional information contact:

U.S. Geological Survey
Upper Midwest Environmental Sciences Center
2630 Fanta Reed Road
La Crosse, Wisconsin 54603
608-781-6269

Please visit http://www.umesc.usgs.gov/ for more information about USGS activities in La Crosse, Wisconsin.




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