SPECIES: Scientific [common] Meesia longiseta (long-stalked thread moss) Forest: Salmon–Challis National Forest Forest Reviewer: Jessica M Dhaemers; Brittni Brown; John Proctor Date of Review: 10/12/2017; 26 February 2018; 30 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.) 1995 No data Allan Lake; ca 0.4 mi S of Allan IDFG Element Occurrence Mountain EO Number: 1 EO_ID: 1151 North Fork Ranger District 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 Not applicable. Species occurrences have been documented since 1990. If determination is no, stop assessment d. Map 1, Long-stalked thread moss range in Idaho (NRCS 2017) Natural Resources Conservation Service (NRCS). 2017. Plants Profile for Meesia longiseta. Internet website: https://plants.usda.gov/core/profile?symbol=MELO70. Accessed on September 18, 2017. Map 2, Long-stalked thread moss observations 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 G4? Apparently Secure (Uncommon but not rare; some cause for long-term concern due to declines or other factors)1 State Rank S1– Critically Imperiled (At very high risk of extinction due to extreme rarity (often 5 or fewer populations), very steep declines, or other factors.)1 USDA Forest Region 1: Idaho Panhandle National Forest (Known)2 Service Region 4: Not listed3 USDI FWS Not listed as a candidate species4 Other Idaho Native Plant Society: 2016 – on list, not yet ranked5; 2011 - SP1 Critically Imperiled (At very high risk of extinction due to extreme rarity (often 5 or fewer populations), very steep declines, or other factors.)6 BLM: Not listed7 1. Idaho Natural Heritage Program. 2016. IDNHP Tracked Plant Species 2016. On file. 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. Idaho Native Plant Society. 2011. Results of the twenty-fifth Idaho Rare Plant Conference – The Idaho Native Plant Society rare plant list. Website: https://idahonativeplants.org/rpc/pdf/2011_Results_IRPC_v2.2.pdf. Accessed on January 11, 2018. 7. 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): Meesia longiseta (long-stalked thread moss) Criteria Rank Rationale Literature Citations 1 A1 This species is known from a single occurrence on SCNF. A population of IDFG. 2017. Idaho Fish and Wildlife Distribution on M. longiseta was observed at Allan Lake in Allen Mountain RNA, Information System, Species Diversity Salmon–Challis approximately 0.4 miles south of Allan Mountain in the North Fork Database, Idaho Natural Heritage National Forest Ranger District (IDFG 2017). Species-specific surveys have not been Data. Accessed on February 27, 2017. conducted on SCNF and the distribution of this species is currently unknown. The boggy forest and calcareous fen habitat that this species occupies is scarce throughout SCNF and there is a strong potential for extirpations and little likelihood of recolonization (Rank A1). Confidence in Rank: High, Medium, or Low 2 B This moss is known from Greenland to Alaska and south to Idaho Consortium of Pacific Northwest Distribution in (historical there), Illinois, Ohio, and New York, where it is only known Herbaria. 2017. Meesia longiseta. surrounding historically (NatureServe 2017). In general, M. longiseta is a rare, but Internet website: geographic area widespread moss, with a circumboreal distribution occasionally http://www.pnwherbaria.org/data/res extending into the arctic (Abramova 1956 in Favreau and Bassard 2011.). ults.php?DisplayAs=WebPage&Exclude Cultivated=Y&GroupBy=ungrouped&S The nearest documented occurrence to SCNF is in Okanogan County, ortBy=Year&SortOrder=DESC&SearchA Washington, over 300 miles from the SCNF occurrence (CPNWH 2017). llHerbaria=Y&QueryCount=1&Genus1= meesia&Species1=longiseta&IncludeSy This species is not restricted to SCNF and has widespread circumboreal nonyms1=Y&Zoom=4&Lat=55&Lng=- distribution but the nearest occurrence is a significant distance from 135&PolygonCount=0. Accessed on SCNF (Rank B). September 19, 2017. Confidence in Rank: High, Medium, or Low Favreau, M. and G.R. Brassard. 2011. An analysis of Meesia (Meesiaceae, Musci) in arctic North America and Greenland. – Carnets de bryologie 1: 2- 9. 1. Internet website: http://www.societequebecoisedebryol ogie.org/Carnets/Carnets1/Carnets1_F Species (Scientific and Common Name): Meesia longiseta (long-stalked thread moss) Criteria Rank Rationale Literature Citations avreau_Brassard_Meesia.pdf. Accessed on September 19, 2017. NatureServe. 2017. Comprehensive Species Report. Meesia longiseta. Internet website: http://explorer.natureserve.org. Accessed on September 18, 2017. 3 A Specific studies for the dispersal capability of this species have not been Dillingham, C. 2005. Conservation Dispersal conducted. However, some generalization are made from bryophytes in Assessment for Meesia triquetra (L.) Capability general and applied to this species. Aongstr. (three-ranked hump-moss) and Meesia uliginosa Hedwig (broad- Asexual reproduction is common in most bryophytes and dispersal nerved hump-moss) in California with a focus on the Sierra Nevada distances may be limited even in those that reproduce through spores. Bioregion. Internet website: (Stoneburner et al. 1992). Although bryophytes are capable of being https://www.fs.fed.us/vms/local- transported hundreds of miles, successful establishment is the exception resources/documents/Meesia_CA.pdf. and not the rule (Pocz and van Zanten 1981). Plant competition has also Accessed on September 18, 2017. been cited as the most important factor in preventing the successful colonization of an area (Pocz and Van Zanten 1981). Populations of Pocz T., van Zanten B.O. 1981. Meesia have been noted to not recolonize areas readily and to have Distribution and dispersal of limited outcrossing opportunities (Dillingham 2005). bryophytes. Adv. Bryol. 1:479-562. Internet website: The fen habitat for this species is also uncommon. The availability of this https://www.researchgate.net/publica type of habitat would severely limit the dispersal capability of this tion/290842887_Distribution_and_dis persal_of_bryophytes. Accessed on species. September 19, 2017. This species has a very limited dispersal ability due to reproductive Stoneburner A, Lane D.M., Anderson constraints and habitat availability (Rank A). L.E. 1992. Spore dispersal distances in Atrichum angustatum Confidence in Rank: High, Medium, or Low (Polytrichaceae). Bryologist 95:324- 328. Internet website: Species (Scientific and Common Name): Meesia longiseta (long-stalked thread moss) Criteria Rank Rationale Literature Citations https://www.jstor.org/stable/3243491 ?seq=1#page_scan_tab_contents. Accessed on September 18, 2017. 4 D The population density of this species has not been documented for this Abundance on the species (Rank D). Salmon–Challis National Forest Confidence in Rank: High, Medium, or Low 5 D The population trend for this species has not been studied on SCNF (Rank Population Trend D). on the Salmon– Challis