SDE Feature Class
Aquatic, Species, California, environment, Nonindigenous, inlandWaters
To provide a link to NAS presence and distribution of nonindigenous aquatic species data summarized by HUC 8 geographic units. If you open the attributes of a Hydrologic Unit Code (HUC) feature in this dataset the link found in the NAS_link will take you to a page that lists of all nonindigenous aquatic species that have been reported as present in the selected HUC.
This GIS dataset offers a link to the California portion of the Nonindigenous Aquatic Species (NAS) information resource for the United States Geological Survey. The NAS program has been established as a central repository for accurate and spatially referenced biogeographic accounts of nonindigenous aquatic species. The program provides scientic reports, online/realtime queries, spatial data sets, regional contact lists, and general information. The goal of the information system is to provide timely, reliable data about the presence and distribution of nonindigenous aquatic species. The NAS database contains locality information for more than 1100 species of vertebrates, invertebrates, and vascular plants. The NAS program provides a continual national repository of distribution information for nonindigenous aquatic species that is used to gain an understanding of aquatic introductions, identify geographic gaps, and access the status of introduced aquatic species nationwide. Data are obtained from many sources including literature, museums, databases, monitoring programs, state and federal agencies, professional communications, online reporting forms, and Aquatic Nuisance Species (ANS) hotline reports. The NAS program defines a nonindigenous aquatic species as a member(s) of a species that enters a body of water of aquatic ecosystem outside of its historic or native range. This includes not only species that arrived from outside of North America but also species native to North America that have been introduced to drainages outside their ranges within the country. Please visit http://nas.er.usgs.gov for more information and to see all of the products and data available through the NAS program.
U.S. Geological Survey. 2012. Nonindigenous Aquatic Species (NAS) Database, Gainesville, FL. Please visit http://nas.er.usgs.gov to see the full range of products and services offered by NAS. This particular dataset was produced by Laura Ryley, Pacific States Marine Fisheries Commission, to bring the functionality of the NAS Query by Drainage (8-digit HUC) page ( http://nas.er.usgs.gov/queries/huc8.aspx?state=CA) into the CalFish map viewer.
These data are the result of efforts by many of government and non-government participants in the field, as well as, USGS and various researchers and managers. All publications based on these data should acknowledge all of these efforts. If a publication is based solely on the analysis of NAS data, we suggest that you involve the NAS Program biologists with the writing and/or review of the manuscript. We would also appreciate receiving a reprint or copy of any publications or reports that make use of the NAS data.