Assigning a conservation status rank to a species or ecosystem requires scoring it along ten conservation status factors, then weighting and pooling the scores into an overall score, which is then translated into a calculated rank. This publication describes the standardized methods, based on application of updated factors.
- Faber-Langendoen D, Nichols J, Master L, Snow K, Tomaino A, Bittman R, Hammerson G, Heidel B, Ramsay L, Teucher A, and Young B. 2012. NatureServe Conservation Status Assessments: Methodology for Assigning Ranks. NatureServe, Arlington, VA