Nez Perce–Clearwater National Forests Forest Plan Assessment 18.0 Potential Species of Conservation Concern June 2014 (updated 7/10/2014) Table of Contents 18.1 Potential Wildlife Species of Conservation Concern ................................................. 18-1 18.1.1 Introduction .................................................................................................. 18-1 18.1.1.1 The Coarse-Filter / Fine-Filter Approach ............................................ 18-3 18.1.1.2 Mesofilter ............................................................................................. 18-4 18.1.1.3 Monitoring ........................................................................................... 18-4 18.1.1.4 Quantifying Wildlife Habitat ............................................................... 18-6 18.1.2 Potential Species of Conservation Concern ................................................. 18-7 18.1.2.1 Species Accounts ............................................................................... 18-11 18.1.3 Habitat Characterizations ........................................................................... 18-77 18.1.3.1 Broad-scale (Basin Level): Interior Columbia River Basin Ecosystem Management Project .............................................................................................. 18-77 18.1.4 Interior Columbia Basin Ecosystem Management Project Key Findings and Implications .............................................................................................................. 18-117 18.1.4.1 Habitat Families ............................................................................... 18-117 18.1.4.2 Species Groups................................................................................. 18-118 18.1.5 Idaho Comprehensive Wildlife Conservation Strategy ........................... 18-120 18.1.5.1 Species of Conservation Concern Relationships with Comprehensive Wildlife Conservation Strategy............................................................................ 18-120 18.1.6 Mid-scale (Forest Level): Nez Perce–Clearwater National Forests ........ 18-129 18.1.6.1 SCC Existing Habitat, Historical Range of Variation and 50-Year Projection Data..................................................................................................... 18-130 18.1.6.2 Other Species of Conservation Concern: Not Modeled ................... 18-156 18.1.7 Forest Plan Revision Landscapes (Sections and Biophysical Settings) relevant to Terrestrial Wildlife Species .................................................................................. 18-156 18.1.7.1 Idaho Batholith and Bitterroot Mountains ....................................... 18-156 18.1.7.2 Uplands Biophysical Setting ............................................................ 18-159 18.1.7.3 Subalpine Biophysical Setting ......................................................... 18-160 18.1.8 Forest Habitat-Type Groups (Fine-scale) ................................................ 18-162 18.1.8.1 Warm/Dry (Habitat Type Group 1) ................................................. 18-163 18.1.8.2 Moderately Warm/Dry (Habitat Type Groups 2 and 3) ................... 18-163 18.1.8.3 Moist Mixed Conifer (Habitat Type Groups 4, 5, and 6) ................ 18-164 18.1.8.4 Cool and Wet/Moist Subalpine Fir (Habitat Type Groups 7 and 8) 18-164 18.1.8.5 Cool/Cold Upper Subalpine (Habitat Type Groups 9, 10 and 11) ... 18-165 i 18.1.9 Other Fine-Scale Habitats ........................................................................ 18-165 18.1.9.1 Grasslands and Shrublands .............................................................. 18-165 18.1.9.2 Riverine Riparian and Wetlands ...................................................... 18-166 18.1.9.3 Old Forest Habitat ............................................................................ 18-166 18.1.9.4 Fine- or Meso-filter Elements .......................................................... 18-168 18.1.10 Conclusions .............................................................................................. 18-171 18.1.11 Potential Plan Components ...................................................................... 18-173 18.1.12 Literature Cited ........................................................................................ 18-174 18.2 Potential aquatic species of conservation concern ................................................. 18-185 18.2.1 Trout Group ............................................................................................. 18-185 18.2.2 Pacific Lamprey (Entosphenus tridentatus) ............................................. 18-185 18.2.3 Western Pearlshell (Margaritifera falcate) ............................................... 18-186 18.2.4 Pristine Pyrg ............................................................................................. 18-186 18.2.5 Literature Cited and Source Information ................................................. 18-187 18.3 Potential Plant Communities of Conservation Concern ......................................... 18-188 18.3.1 Existing Information ................................................................................ 18-188 18.3.2 Informing the Assessment........................................................................ 18-188 18.3.3 Identifying Plant Communities of Conservation Concern ....................... 18-188 18.3.4 Current Conditions ................................................................................... 18-188 18.3.4.1 Plant Communities of Conservation Concern.................................. 18-188 18.3.4.2 Trends and Drivers ........................................................................... 18-207 18.3.4.3 Information Needs ........................................................................... 18-207 18.3.5 Literature Cited ..............................................................................................209 18.4 Potential Botanical Species of Conservation Concern ........................................... 18-213 18.4.1 Existing Information ................................................................................ 18-213 18.4.2 Informing the Assessment........................................................................ 18-213 18.4.2.1 Ecosystem Integrity ......................................................................... 18-213 18.4.2.2 Ecosystem Diversity ........................................................................ 18-214 18.4.2.3 Identifying Potential Species of Conservation Concern .................. 18-214 18.4.3 Current Conditions ................................................................................... 18-215 18.4.3.1 Potential Plant Species of Conservation Concern ............................ 18-215 18.4.4 Trends and Drivers ................................................................................... 18-234 18.4.5 Information Needs ................................................................................... 18-234 ii 18.4.6 Literature Cited ........................................................................................ 18-235 List of Tables Table 18-1. NatureServe global (G) and state (S) rankings ................................................. 18-9 Table 18-2. Species of Conservation Concern and habitat associations ............................ 18-10 Table 18-3. Percentage of Watersheds (5th Hydrologic Unit Code [HUC]) in Three Trend Categories by relevant Terrestrial Habitat Family (Wisdom et al. 2000) .............. 18-79 Table 18-4. Interior Columbia Basin Ecosystem Management Project (ICBEMP) Families and Species of Conservation Concern (SCC) representation ................................ 18-81 Table 18-5. Percentage of Watersheds (5th Hydrologic Unit Code [HUC]) in Three Trend Categories for Family 1, by Ecological Reporting Unit (Wisdom et al. 2000) ..... 18-82 Table 18-6. Percentage of Watersheds (5th Hydrologic Unit Code [HUC]) in Three Trend Categories for Family 2, by Ecological Reporting Unit (Wisdom et al. 2000) ..... 18-84 Table 18-7. Percentage of Watersheds (5th Hydrologic Unit Code [HUC]) in 3 Trend Categories for Family 3, by Ecological Reporting Unit (Wisdom et al. 2000) ..... 18-86 Table 18-8. Percentage of Watersheds (5th Hydrologic Unit Code [HUC]) in 3 Trend Categories for Family 5, by Ecological Reporting Unit (Wisdom et al. 2000) ..... 18-88 Table 18-9. Percentage of Watersheds (5th Hydrologic Unit Code [HUC]) in 3 Trend Categories for Family 7, by Ecological Reporting Unit (Wisdom et al. 2000) ..... 18-89 Table 18-10. Interior Columbia Basin Ecosystem Management Project (ICBEMP) families and Species of Conservation Concern (SCC) representation ................................ 18-90 Table 18-11. Source habitat trends at the group level (Wisdom et al. 2000) .................... 18-91 Table 18-12. Summary of Effects and Potential Plan Components for Rare Plant Communities ........................................................................................................ 18-203 Table 18-13. Summary of Rare Plant Communities, Nez Perce–Clearwater National Forests .............................................................................................................................. 18-205 Table 18-14. Summary of Species of Conservation Concern Considerations by Species Guild .............................................................................................................................. 18-217 List