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Scientific [Common] Lewisia Sacajaweana – BL Wilson & E

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Scientific [Common] Lewisia Sacajaweana – BL Wilson & E SPECIES: Scientific [common] Lewisia sacajaweana – B. L. Wilson & E. Rey- Vizgirdas [Sacajawea’s Bitter-Root] Forest: Salmon–Challis National Forest Forest Reviewer: Brittni Brown; John Proctor Date of Review: 15 February 2018; 13 March 2018 Forest concurrence (or YES recommendation if new) for inclusion of species on list of potential SCC: (Enter Yes or No) FOREST REVIEW RESULTS: 1. The Forest concurs or recommends the species for inclusion on the list of potential SCC: Yes_X__ No___ 2. Rationale for not concurring is based on (check all that apply): Species is not native to the plan area _______ Species is not known to occur in the plan area _______ Species persistence in the plan area is not of substantial concern _______ FOREST REVIEW INFORMATION: 1. Is the Species Native to the Plan Area? Yes _X_ No___ If no, provide explanation and stop assessment. 2. Is the Species Known to Occur within the Planning Area? Yes _X _ No___ If no, stop assessment. Table 1. All Known Occurrences, Years, and Frequency within the Planning Area Year Number of Location of Observations (USFS Source of Information Observed Individuals District, Town, River, Road Intersection, HUC, etc.) July 31, 267 total North Fork Ranger District IDFG Element Occurrence EO 1990 individuals Bighorn Crags, along the Crags Number: 4 (4 Trail (FS Trail 021) on divide EO_ID: 26536 populations) between Roaring Creek and Old EO_ID: 4417 Clear Creek Xeric crest, all aspects, 0-8 percent slope, open whitebark pine woodland, 8,900 feet in elevation. July 31, 53 total North Fork Ranger District IDFG Element Occurrence EO 1990 individuals Along the Crags Trail (FS Trail Number: 5 021) about 1 mile south of Year Number of Location of Observations (USFS Source of Information Observed Individuals District, Town, River, Road Intersection, HUC, etc.) (3 Cathedral Rock and 2.7 miles EO_ID: 26519 populations) NW of Crags Campground Old EO_ID: 1714 Xeric crest, all aspects, 0-3 percent slope, open whitebark pine woodland, 8,800 feet in elevation. a. Are all Species Occurrences Only Accidental or Transient? Yes___ No_ X _ If yes, document source for determination and stop assessment. b. For species with known occurrences on the Forest since 1990, based on the number of observations and/or year of last observation, can the species be presumed to be established or becoming established in the plan area? Yes_ X_ No___ If no, provide explanation and stop assessment c. For species with known occurrences on the Forest predating 1990, does the weight of evidence suggest the species still occurs in the plan area? Yes___ No___ Provide explanation for determination: N/A. Occurrences have been recorded since 1990. If determination is no, stop assessment d. Map 1, Sacajawea bitterroot range in Idaho and surrounding states and provinces (NRCS 2017) NRCS (United States Department of Agriculture, Natural Resources Conservation Service). 2017. Lewisia sacajaweana. B.L. Wilson & E. Rey-Vizg. Sacajawea bitter root. Internet website: https://plants.usda.gov/core/profile?symbol=LESA17. Accessed on October 16, 2017. e. Map 2, Sacajawea bitterroot occurrences on the Salmon–Challis National Forest (IDFG. 2017. Idaho Fish and Wildlife Information System, Species Diversity Database, Idaho Natural Heritage Data. Accessed on February 27, 2017.) 3. Is There Substantial Concern for the Species’ Capability to persist Over the Long-term in the Plan Area Based on Best Available Scientific Information? Table 2. Status summary based on existing conservation assessments Entity Status/Rank (include definition if Other) Global Rank G2+— Imperiled (At high risk of extinction due to very restricted range, very few populations (often 20 or fewer), steep declines, or other factors. A “+” follows the G and/or T rank if the species is an Idaho endemic and has the sole rank global and/or trinomial rank authority.)1 State Rank S2— Imperiled (At high risk of extinction due to very restricted range, very few populations (often 20 or fewer), steep declines, or other factors.)1 USDA Forest Region 1: Not listed2 Service Region 4: Sensitive Boise, Challis, Payette, Salmon, and Sawtooth (?) National Forests3 USDI FWS Not listed as a candidate species4 Other Idaho Native Plant Society: G2S2 RARE5 BLM: Type 4 (These are species generally rare in Idaho with small populations or localized distribution and currently have low threat levels. However, due to the small populations and habitat area, certain future land uses in close proximity could significantly jeopardize these species)6 1. Idaho Natural Heritage Program. 2016. IDNHP Tracked Plant Species 2016. Accessed January 12, 2018 2. USFS Region 1. 2011. 2011 Sensitive Species List Idaho and Montana. Website: http://fsweb.r1.fs.fed.us/wildlife/wwfrp/TESnew.htm. Accessed January 10, 2017. 3. USFS Region 4. 2016. Proposed, Endangered, Threatened, and Sensitive Species List. On file. Accessed January 11, 2017. 4. USFWS. 2017. Candidate species believed to or known to occur in Idaho. Website: https://ecos.fws.gov/ecp0/reports/species-listed-by-state-report?state=ID&status=candidate. Accessed January 12, 2018. 5. Idaho Native Plant Society. 2016. INPS Rare Plant List May 2016. https://idahonativeplants.org/rare-plants-list/ Accessed January 10, 2018. 6. BLM. 2016. Bureau of Land Management Idaho Special Status Plants List Aug 2016. On file. Accessed 15 January, 2018. Table 3. Status summary based on best available scientific information. Species (Scientific and Common Name): Lewisia sacajaweana (Sacajawea’s bitterroot) Criteria Rank Rationale Literature Citations 1 A1 Sacajawea’s bitterroot is known from two occurrences on the Salmon- IDFG. 2017. Idaho Fish and Wildlife Distribution on Challis National Forest from the North Fork Ranger District (IDFG 2017), Information System, Species Diversity Salmon–Challis suggesting the species is scarce (Rank A). Although, a floristic inventory of Database, Idaho Natural Heritage National Forest the SCNF took place (Irwin 2014), targeted systematic surveys have not Data. Accessed on February 27, 2017. been conducted on the Forest. Potential habitat (see Criterion 6) is patchy and isolated. Irwin, J. J. 2014. “A Floristic Inventory of East-Central Idaho, U.S.A.” Master’s thesis, University of Wyoming, Confidence in Rank: High, Medium, or Low Laramie. 2 B Sacajawea’s bitterroot is an Idaho endemic; its distribution is limited to Mancuso, M. 2014. “Rare Plant Profile Distribution in approximately 40 occurrences in four (Boise, Custer, Elmore, Valley; – Sacajawea’s bitterroot – a gem in the surrounding NRCS 2017), five (Lemhi), or seven (Adams, Washington; NatureServe Gem State mountains.” Sage Notes, a geographic area 2017) counties in the mountains of central Idaho, with sources differing publication of the Idaho Native Plant on which observations are considered reliable. Occurrences generally Society 36 (1): 15. contain less than 100 plants each, though some have between 500 up to NRCS (United States Department of a few thousand plants (NatureServe 2017, Tetra Tech 2015). Agriculture, Natural Resources Conservation Service). 2017. Lewisia The entire known distribution encompasses an area roughly 120 miles sacajaweana B.L. Wilson & E. Rey-Vizg. long by 75 miles wide, including portions of the Payette, Boise, Sawtooth, Sacajawea bitter root. Internet and Salmon–Challis National Forests (Mancuso 2014). website: https://plants.usda.gov/core/profile?s Lewisia sacajaweana, endemic to Idaho, and was described as a distinct ymbol=LESA17. Accessed on October species from L. kelloggii by Wilson et al. (2005). L. kelloggii is now 16, 2017. considered to only occur in the Sierra Nevada mountains in California. NatureServe. 2017. NatureServe Explorer: An online encyclopedia of life Because this species has a limited distribution outside of the Salmon– [web application]. Version 7.1. Challis National Forest, this criterion was ranked “B.” NatureServe, Arlington, Virginia Internet website: Species (Scientific and Common Name): Lewisia sacajaweana (Sacajawea’s bitterroot) Criteria Rank Rationale Literature Citations Confidence in Rank: High, Medium, or Low http://explorer.natureserve.org/servle t/NatureServe?searchName=Lewisia+s acajaweana. Accessed on October 16, 2017. Tetra Tech. 2015. Sacajawea’s Bitterroot and Other Sensitive Plant Survey Report, CuMo Exploration Project. Tetra Tech, Boise, Idaho. Wilson, B.L., Hipkins, V.D., Rey- Vizgirdas, E., Kaye, T.N. 2015. Variation in Lewisia kelloggii (Portulaceae) with description of a new species endemic to Idaho. Western North American Naturalist, 65(3): 345-358. 3 B Literature describing the dispersal capability of Sacajawea’s bitterroot is Bandringa, R. W. 1999. “The Dispersal not available; however, dispersal characteristics may be inferred by Ethnobotany and Descriptive Ecology Capability examining literature available for common bitterroot (L. rediviva), which of Bitterroot, Lewisia rediviva Pursh occurs in similar habitats in the region. (Portulaceae), in the Lower Thompson River Valley, British Columbia: A Salient Root Food of the Nlaka’pamux Common bitterroot (Howard 1993) reproduces solely by seed, as it lacks First Nation.” Master’s thesis, rhizomes or other means of reproducing vegetatively (Flora of North University of British Columbia, America 2017). Common bitterroot seeds are borne in capsules, and are Vancouver, Canada. dispersed by wind and gravity (Bandringa 1999). Common bitterroot seeds do not appear to be transported long distances by animals or other Flora of North America. 2017. Lewisia means,
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