Great Lakes Geographic Information System Michigan Department of Natural Resources 20070103 Ann Arbor, MI Great Lakes Information Network (GLIN) http://gis.glin.net/ogc/services.php#lmb_zmussels_nais The concern caused by the explosive spread of the zebra mussel, (Dreissena polymorpha), within the United States resulted in passage of the Nonindigenous Aquatic Nuisance Prevention and Control Act of 1990 (P.L. 101-646). The impact of this biofouling pest on the economy and ecological processes in the U.S. and Canada has required prompt action on a large scale to prevent further infestations and minimize ecological degradation. This data set is a compilation of reports of confirmed zebra mussel sightings in the Lake Michigan basin from 1988 to September 2002. It provides geographical and historical information to show distribution over time. The reports came from a variety of federal, State, and municipal agencies, public utilities, universities, engineering and private consultant firms. The locations of confirmed sightings were registered at 1:100,000-scale on EPA Reach File Version 3.0 and are maintained as an Arc/INFO export file. This is a revised version of the December, 2001, data set. The data are an essential part of the Department of the Interior's Nonindigenous Aquatic Species Program, Summary: Zebra mussel locations in the Lake Michigan basin unknown ground condition Complete Complete -88.904274 -84.237984 46.068111 41.370052 ISO 19115 Topic Category biota Uncontrolled Keywords Lake Michigan basin Great Lakes None None. Acknowledgment of the National Atlas of the United States of America and (or) the U.S. Geological Survey would be appreciated in products derived from these data. Shapefile Christine Geddes University of Michigan Project Coordinator Mailing and Physical

Institute for Fisheries Research, 212 Museums Annex Bldg, 1109 N. University Ave.

Ann Arbor Michigan 48109-1084 734-663-3554 x 121 cgeddes@umich.edu WMS-based PNG preview of dataset at full extent PNG GNU/Linux i686 i386 Great Lakes Geographic Information System Michigan Department of Natural Resources unknown 2009-12-30T11:38:14-04:00 Christine Geddes University of Michigan Project Coordinator Mailing and Physical

Institute for Fisheries Research, 212 Museums Annex Bldg, 1109 N. University Ave.

Ann Arbor Michigan 48109-1084 734-663-3554 x 121 734-663-9399 cgeddes@umich.edu FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 Pete Giencke Great Lakes Commission Lead Systems Developer Mailing and Physical

2805 S. Industrial Hwy, Suite 100

Ann Arbor MI 48104 (734) 971-9135 x132 (734) 971 - 9150 pgiencke@glc.org lmb_zmussels_nais Disclaimer. The Great Lakes Commission (GLC) and the Great Lakes Information Network (GLIN) cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. The Great Lakes Commission (GLC) and the Great Lakes Information Network (GLIN) make no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty. Shapefile Zebra mussel locations in the Lake Michigan basin Shapefile compressed with GNU zip GNU/Linux i686 i386 GML Zebra mussel locations in the Lake Michigan basin Geographic Markup Language (GML) compressed with GNU zip GNU/Linux i686 i386 SVG Zebra mussel locations in the Lake Michigan basin No compression applied GNU/Linux i686 i386 PDF Zebra mussel locations in the Lake Michigan basin No compression applied GNU/Linux i686 i386 none GCS_North_American_1983 Decimal Degrees 0.01757812 0.01757812