National and Subnational Conservation Status Definitions

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Listed on this web page are definitions for interpreting NatureServe conservation status ranks at the national (N-rank) and subnational (S-rank) levels. The term "subnational" refers to state or province-level jurisdictions (e.g., California, Ontario). Assigning national and subnational conservation status ranks for species and ecological communities follows the same general principles as used in assigning global status ranks. A subnational rank, however, cannot imply that the species or community is more secure at the state/province level than it is nationally or globally (i.e., a rank of G1S3 cannot occur), and similarly, a national rank cannot exceed the global rank. Subnational ranks are assigned and maintained by state or provincial natural heritage programs and conservation data centers.

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ELECTRONIC FILE - Zoology: Multiple Species

SWAP (2/19/16) citation:
NatureServe. 2015b. National and Subnational Conservation Status Definitions. Arlington (VA): NatureServe. [accessed 2015 May 14]. http://explorer.natureserve.org/nsranks.htm.