Red Alder (Alnus rubra) Conservation Status Review
Review Date = 06/01/2012
Score3 - Vey Small: Generally <2,000 individuals.
Score1 - Peripheral, Disjunct or Sporadic Distribution in MT: Widespread species that is peripheral, disjunct or sporadically distributed within MT such that it occurs in <5% of the state (<7,500 sq. miles or the combined area of Beaverhead and Ravalli Counties) or is restricted to 4-5 sub-basins.
CommentPeripheral in northwest Montana
Area of Occupancy
Score2 - Low: Generally occurring in 4-10 Subwatersheds (6th Code HUC’s).
ScoreNA - Rank factor not assessed.
Score0-1 - Low to Medium.
Score0-1 - Low to Moderate Vulnerability.
Score1 - Moderate: Species is restricted to a specific habitat that is more widely distributed or to several restricted habitats and is typically dependent upon relatively unaltered, good-quality habitat (C Values of 5-7).
Raw Conservation Status Score
7 to 9 total points scored out of a possible 16 (Rarity factors and threats only).