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.
