The Nonindigenous Aquatic Species Database (NAS) information resource is an established central repository for spatially referenced biogeographic accounts of introduced aquatic species. The NAS website provides scientific reports, online/real-time queries, spatial data sets, distribution maps, fact sheets, and general information.

Published: September 11, 2015 at 18:12

URL: https://ipt-obis.gbif.us/resource?r=usgs_nas

Pam Schofield
U.S. Geological Survey

Abigail Benson
U.S. Geological Survey

5,006

occurrence records

taxa

species

Taxa

Missing and invalid fields

Field	Missing	Invalid
basisOfRecord		1,265	25.3%
coordinateUncertaintyInMeters	5,006		100.0%
maximumDepthInMeters	5,006		100.0%
minimumDepthInMeters	5,006		100.0%
occurrenceStatus	5,006		100.0%
scientificNameID		5,006	100.0%

Quality flags

The OBIS data quality flags are documented at https://github.com/iobis/obis-qc.

Flag	Records
NO_DEPTH	5,006	100.0%
ON_LAND	872	17.4%
NOT_MARINE	62	1.2%

United States Geological Survey Nonindigenous Aquatic Species Database

Taxa

Missing and invalid fields

Quality flags

Measurement types

DNA derived data