United States Geological Survey 2008-01-28T14:14:14-05:00 Ann Arbor, MI Great Lakes Information Network (GLIN) http://gis.glin.net/ogc/services.php#gl_zebra_mussel_distribution 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 map layer is a compilation of reports of confirmed zebra mussel sightings in the United States from 1988 to January 2008. 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 ArcInfo export file. This is a revised version of the May 2003 map layer The data are an essential part of the Department of the Interior's Nonindigenous Aquatic Species Program, http://nas.er.usgs.gov/. The data were compiled for use by resource managers to make them aware of zebra mussel occurrences so that they may help to control or prevent the spread of zebra mussels. These data are intended for geographic display and analysis at the national level, and for large regional areas. The data should be displayed and analyzed at scales appropriate for 1:2,000,000-scale data. No responsibility is assumed by the U.S. Geological Survey or the National Atlas of the United States in the use of these data. Summary: Zebra mussel (Dreissena polymorpha) locations in the Great Lakes region (2008) 1988 200801 Ground Condition Complete As Needed -94.204995 -71.165642 48.386948 37.006191 ISO 19115 Topic Category biota Uncontrolled Keywords Zebra mussel Dreissena polymorpha great lakes invasive species 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 Amy J. Benson U.S. Geological Survey Fisheries Biologist Mailing and Physical

7920 NW 71st Street

Gainesville FL 32653-3071 352.264.3477 abenson@usgs.gov WMS-based PNG preview of dataset at full extent PNG GNU/Linux i686 i386 United States Geological Survey unknown 2009-12-30T11:38:14-04:00 Amy J. Benson U.S. Geological Survey Fisheries Biologist Mailing and Physical

7920 NW 71st Street

Gainesville FL 32653-3071 352.264.3477 abenson@usgs.gov 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 gl_zebra_mussel_distribution 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 (Dreissena polymorpha) locations in the Great Lakes region (2008) Shapefile compressed with GNU zip GNU/Linux i686 i386 GML Zebra mussel (Dreissena polymorpha) locations in the Great Lakes region (2008) Geographic Markup Language (GML) compressed with GNU zip GNU/Linux i686 i386 SVG Zebra mussel (Dreissena polymorpha) locations in the Great Lakes region (2008) No compression applied GNU/Linux i686 i386 PDF Zebra mussel (Dreissena polymorpha) locations in the Great Lakes region (2008) No compression applied GNU/Linux i686 i386 none Point Point 2433 All reports in the data base on zebra mussel locations were confirmed as being zebra mussels. 99%, 1% Error A zebra mussel location was included in the data base if it was confirmed by a trained biologist or by someone who had received training to be able to identify zebra mussels. No tests for logical consistency have been performed on this map layer. This data base is by no means an all inclusive listing of zebra mussel locations. But it is a fair and accurate representation of their distribution in North America. Zebra mussel sightings were reported with varying levels of accuracy. Some of the reports were as latitude-longitude coordinates, some as river miles, and others as just a lake, beach, harbor, or a water body and nearest town name. The locations were digitized as a single point in the reported water body at the place nearest to the town. If no specific location was reported in a lake, the point was digitized in the middle. These were all small lakes; the Great Lakes had specific locations associated with them. Each zebra mussel sighting location was checked by manual comparison of the on-screen point with hard copy maps. Sources for these data are numerous. They include federal, State, and municipal governments; engineering and environmental firms; universities; industries; and public utility companies. Unknown The sources for these data are too numerous to list here. However, detailed information on each zebra mussel sighting is available from the Florida Integrated Science Center at the address listed in the contact information. Variable 1988 2002 Ground condition ZMR Locations of zebra mussel sightings U.S. Geological Survey, Florida Integrated Science Center Unknown This source is updated whenever new reports (ZMR) are received. Electronic mail 1988 2002 Ground condition ZML Zebra mussel locations National Atlas of the United States 19990326 2000000 Online 1995 1999 Ground condition Atlas-HYDRO9903 Spatial information National Atlas of the United States 199910 Online 1988 1999 Ground condition Atlas-ZML99 Zebra mussel locations and attributes National Atlas of the United States 199911 2000000 Online 1995 1999 Ground condition Atlas-HYDRO9911 Spatial information National Atlas of the United States 1998 2000000 Online 1998 Publication date Atlas-CNTY98 Spatial information National Atlas of the United States 200006 Online 1988 2000 Ground condition Atlas-ZML00 Zebra mussel locations and attributes National Atlas of the United States 200112 Online 1988 2001 Ground condition Atlas-ZML01 Zebra mussel locations and attributes National Atlas of the United States 200301 2000000 Online 1995 2002 Ground condition Atlas-HYDRO2003 Spatial information National Atlas of the United States 200208 2000000 Online 1972 2001 Ground condition Atlas-CNTY2001 Spatial and attribute information National Atlas of the United States 200305 Online 1988 2002 Ground condition Atlas-ZML02 Zebra mussel locations and attributes U.S. Geological Survey 200503 Electronic mail 2003 200502 Ground condition UpdateZM2005 Zebra mussel locations and attributes After receiving a report of a confirmed zebra mussel sighting, the location was found on a paper map. The scale of that map varied; we used the finest resolution available. The point was then digitized on- screen using ArcInfo's arcedit feature, and was referenced to EPA Reach File Version 3.0 1:100,000-scale data (ArcInfo coverages in Albers Equal Area Projection). ZMR Unknown ZML U.S. Geological Survey Amy Benson Fishery Biologist Mailing and physical address

Florida Integrated Science Center, 7920 NW 71st Street

Gainesville FL 32653 USA 352-378-8181 x306 352-378-4956 amy_benson@usgs.gov Monday - Friday 8AM-4PM The National Atlas received the ZML data file from the Florida Integrated Science Center in ArcInfo export format, and it was read into ArcInfo and converted to Geographic coordinates. The file was compared to the Hydrography Features (Streams and Waterbodies) map layer, and several points were adjusted to fall on water features rather than on land. The map layer was converted to shapefile format. Atlas-HYDRO9903 ZML 1999 Atlas-ZML99 Additional points were appended to the map layer, using similar procedures as were used to produce the original map layer. Points were compared to the current Hydrography Features (Streams and Waterbodies) map layer, and several points were adjusted to fall on water features rather than on land. Also, the file was compared to the County Boundaries layer to verify the county and State where zebra mussels were located. ZML Atlas-HYDRO9911 Atlas-CNTY98 Atlas-ZML99 2000 Atlas-ZML00 Additional points were appended to the map layer, using similar procedures as were used to produce the original map layer. Points were compared to the Hydrography Features (Streams and Waterbodies) map layer, and several points were adjusted to fall on water features rather than on land. Also, the file was compared to the County Boundaries layer; several points were adjusted to fall in the correct county and State as listed in their location descriptions. Attribute items that had specified the age classification and substrate to which the specimen was attached were dropped. ZML Atlas-HYDRO9911 Atlas-CNTY98 Atlas-ZML00 2001 Atlas-ZML01 Additional points were appended to the map layer, using similar procedures as were used to produce the original map layer. The new points were compared to the latest National Atlas Streams and Waterbodies map layer to make sure that the features were located on the correct named water feature and that the features were on the water rather than on land. Also, the points were compared to the National Atlas 2001 County Boundaries layer; several points were adjusted to fall in the correct county as listed in their location descriptions. ZML Atlas-HYDRO2003 Atlas-CNTY2001 Atlas-ZML01 200304 Atlas-ZML02 Additional points were appended to the map layer, using similar procedures as were used to produce the original map layer. The new points were compared to the latest National Atlas Streams and Waterbodies map layer to make sure that the features were located on the correct named water feature and that the features were on the water rather than on land. Three water feature names were changed to match the name given in the Atlas data. Also, the points were compared to the National Atlas 2001 County Boundaries layer; several points were adjusted to fall in the correct county as listed in their location descriptions. UpdateZM2005 Atlas-HYDRO2003 Atlas-CNTY2001 Atlas-ZML02 200504 GCS_WGS_84 Decimal Degrees 0.01757812 0.01757812 Zebra mussel location (described by Zmusslx020.dbf) The location where a zebra mussel has been sighted. National Atlas of the United States Shape The representation of the entity in the data. National Atlas of the United States Point 0-dimensional element. ESRI GIS software Zmusslx020 Internal feature number. National Atlas of the United States 1 2433 Y The year of the zebra mussel sighting. U.S. Geological Survey 0 The year is unknown. U.S. Geological Survey 1988 2005 St The 2-letter FIPS code for the State in which the zebra mussel sighting falls, or a three-letter abbreviation for the Canadian province in which the sighting falls. U.S. Geological Survey Codes for the Identification of the States, the District of Columbia and the Outlying Areas of the United States, and Associated Areas, FIPS PUB 5-2. U.S. Department of Commerce ONT Province of Ontario, Canada. U.S. Geological Survey QUE Province of Quebec, Canada. U.S. Geological Survey Co The name of the county where the zebra mussel sighting falls. For sightings in Canada, this field may contain the Census Division name or may be blank. U.S. Geological Survey Counties and Equivalent Entities of the United States, Its Possessions, and Associated Areas, FIPS PUB 6-4. U.S. Department of Commerce Standard Geographical Classification, 2001, Census Divisions Statistics Canada <blank> The sighting falls in Canada and the Census Division name is not available. U.S. Geological Survey Fips The State and county FIPS code from the TIGER/Line Precensus files, for the location where the zebra mussel sighting falls. U.S. Geological Survey Counties and Equivalent Entities of the United States, Its Possessions, and Associated Areas, FIPS PUB 6-4. U.S. Department of Commerce <blank> The sighting falls in Canada. U.S. Geological Survey Locality The specific location of the zebra mussel sighting. U.S. Geological Survey There is no predefined set of valid location descriptions. SPEC_ID A unique record number in the USGS Nonindigenous Aquatic Species Database GENUS genus SPECIES species String 254 COMMON common name String 254 YEAR >year of collection or observation (could also be a publication date if actual collection date not reported in the literature) Number 10 STATE >state String 254 COUNTY county String 254 LOCALITY specific (as possible) location String 254 HUC USGS hydrologic unit code Number 10 LAT latitude Float 19 11 LON longitude Float 19 11 LAT_LON_SO source of coordinates (3 options) 1. Reported = given by collector or observer 2. GNIS (USGS Geographic Names Information System lookup (online)) 3. Map derived = best estimate based on the reported location description String 254