U.S. Nonindigenous Aquatic Species Sightings Database

Over 30 years of confirmed sightings for non-native aquatic species across the United States, monitored by the U.S. Geological Survey. The database was initiated by a Congressional task force in 1990 and is maintained by the USGS Southeast Ecological Science Center. It serves as a national clearinghouse for tracking the distribution of introduced aquatic organisms.

Use Cases

• Mapping species_distribution and spread_vectors using geospatial coordinates and observation dates.
• Analyzing temporal_trends in species_introductions across different states or water bodies.
• Modeling habitat_suitability and invasion_risk based on species_taxonomy and reported locations.
• Generating alerts for new_sightings in specific geographic regions to support rapid response.

Strengths

• Data collection initiated by a Congressional task force, providing a long-term record since 1990.
• Nationwide spatial coverage for the United States, confirmed through the USGS monitoring program.

Limitations

• Unknown total record count and update frequency limit statistical analysis.
• Data likely focuses on reported and confirmed sightings, potentially missing unreported occurrences.

Provenance

Source

U.S. Geological Survey (USGS) Nonindigenous Aquatic Species (NAS) Program.

Collection Method

Monitoring, analysis, and recording of confirmed sightings from various sources.

Time Range

Records since 1990.

Geography

United States.