information or due to substantially conflicting information about status or trends. SNA — Not Applicable A conservation status rank is not applicable because the species is not a suitable target for conservation activities. S#S# — Range Rank A numeric range rank (e.g., S2S3) is used to indicate any range of uncertainty about the status of the species or community. Ranges cannot skip more than one rank (e.g., SU is used rather than S1S4). A similar ranking system is used for the "G-ranks" and "N-ranks" which are the Global (G) and National (N) status ranks for species. Again refer to NatureServe.org for additional details. External links Ontario Ministry of Natural Resources (OMNR)/ Ministère des richesses naturelles de l'Ontario (MRNO) OMNR Natural Heritage Information Centre / MRNO Centre d'information des heritages naturelles Nature Serve www.natureserve.org Environmental conservation Population ecology