See the documents “Pacific Lamprey Entosphenus tridentatus Assessment 2018” (https://www.sciencebase.gov/catalog/item/53b04dade4b0616e8bce5217) for complete information. These data were the results of the assessment and were used to create the maps found in the documents. NatureServe and its member programs and collaborators use a suite of factors to assess the extinction or extirpation (regional extinction) risk of plants, animals, and ecosystems (or “elements” of biodiversity). By researching and recording information on a set of factors, biologists can assign a conservation rank to these elements at both global and regional (i.e., national/subnational) scales. The protocol for assigning a conservation rank...
