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Scientific [Common] Margaritifera Falcata [Western Pearlshell] Forest: Salmon-Challis National Forest Forest Reviewer: Bart L

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Scientific [Common] Margaritifera Falcata [Western Pearlshell] Forest: Salmon-Challis National Forest Forest Reviewer: Bart L SPECIES: Scientific [common] Margaritifera falcata [Western pearlshell] Forest: Salmon-Challis National Forest Forest Reviewer: Bart L. Gamett Date of Review: March 30, 2018 Forest concurrence (or No 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___ No_X_ 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 ___X___ 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 Location of Observations (USFS District, Town, River, Year Number of Road Intersection, HUC Observed Individuals etc.) Source of Information Salmon River 1 Near Shoup University of Michigan, Museum of Zoology, Mollusk Collection (https://fms02.lsa.umich.edu/fmi/webd/um mz_mollusks, specimen number 215976), apparent duplicate at IDFG (https://idfg.idaho.gov/species/observation/ 597638) Salmon River numerous Several locations between Vannote, R.L. and G.W. Minshall. 1982. Shoup and Corn Creek Fluvial processes and local lithology controlling abundance, structure, and composition of mussel beds. Proceedings of the National Academy of Sciences of the United States of America 79(13):4103-4107. Salmon River 60 valves Salmon River across road Philadelphia Academy of Natural Sciences from Sheepeater Shelter (http://clade.ansp.org/malacology/collection Historic Site, 5.4 miles west of s/details.php?mode=details&catalognumber Shoup =345063) , apparent duplicate at IDFG (https://idfg.idaho.gov/species/observation/ 597384) Middle Fork unknown At Boundary Creek Messner, J. Personal communication. March Salmon River 23, 2018 (Site 2) Camas Creek unknown Between Hammer Creek and Messner, J. Personal communication. March Anvil Creek 23, 2018 (Site 4) Middle Fork unknown At Boundary Creek Messner, J. Personal communication. March Salmon River 23, 2018 (Site 6) Loon Creek unknown Between Mearney Creek and Messner, J. Personal communication. March Burn Creek 23, 2018 (Site 9A) Loon Creek unknown Upstream of Burn Creek Messner, J. Personal communication. March 23, 2018 (Site 9B) Loon Creek unknown Downstream of Indian Creek Messner, J. Personal communication. March 23, 2018 (Site 9C) Camas Creek unknown Between Hammer Creek and Messner, J. Personal communication. March Anvil Creek 23, 2018 (Site 10) Middle Fork unknown Several locations between Stewart, C. Personal communication. March Salmon River Boundary Creek Launch Site 22, 2018 and Salmon River Marsh Creek unknown near bridge that crosses Matsaw, S. Personal communication. March Marsh Creek between Beaver 23, 2018 (Site 1) Creek and Capehorn Creek Elk Creek unknown at various location for several Matsaw, S. Personal communication. March miles upstream of Bear Valley 23, 2018 (Site 2) Creek Middle Fork unknown near Big Bend Camp Matsaw, S. Personal communication. March Salmon River 23, 2018 (Site 3) Middle Fork unknown camp downstream of Indian Matsaw, S. Personal communication. March Salmon River Creek airstrip 23, 2018 (Site 4) Middle Fork unknown near confluence with Marble Matsaw, S. Personal communication. March Salmon River Creek 23, 2018 (Site 5) Middle Fork unknown near confluence with Little Matsaw, S. Personal communication. March Salmon River Loon Creek 23, 2018 (Site 6) Middle Fork unknown downstream of White Creek Matsaw, S. Personal communication. March Salmon River Bridge 23, 2018 (Site 7) Middle Fork unknown near confluence with Loon Matsaw, S. Personal communication. March Salmon River Creek 23, 2018 (Site 8) Middle Fork unknown just upstream of Flying B Matsaw, S. Personal communication. March Salmon River Ranch 23, 2018 (Site 9) Middle Fork unknown near confluence with Big Matsaw, S. Personal communication. March Salmon River Creek 23, 2018 (Site 10) Salmon River numerous Several locations between Vannote, R.L. and G.W. Minshall. 1982. Shoup and Corn Creek Fluvial processes and local lithology controlling abundance, structure, and composition of mussel beds. Proceedings of the National Academy of Sciences of the United States of America 79(13):4103-4107. 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 If determination is no, stop assessment d. Map 1, Western pearlshell (Margaritifera falcata) range in Idaho (IDFG 2017a) IDFG (Idaho Department of Fish and Game). 2017. Western pearlshell (Margaritifera falcata). Internet website: https://idfg.idaho.gov/species/taxa/20574. Accessed on December 26, 2017. e. Map 2, Western pearlshell (Margaritifera falcata) range in Montana (MNHP and MFWP 2017). MNHP and MFWP (Montana Natural Heritage Program and Montana Fish, Wildlife, and Parks). 2017. Montana Field Guides – Western pearlshell (Margaritifera falcata). Internet website: http://fieldguide.mt.gov/speciesDetail.aspx?elcode=IMBIV27020. Accessed on December 26, 2017. f. Map 3, Western pearlshell (Margaritifera falcata) distribution on the Salmon-Challis National Forest (Salmon-Challis National Forest western pearlshell GIS distribution layer queried on March 24, 2018). 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) NatureServe G5- Secure (Common; widespread and abundant) Global Rank NatureServe S2- Imperiled (At high risk of extinction due to a very restricted range, very few populations (often 20 or fewer), steep declines, State Rank or other factors) State List IDAPA- Unprotected Wildlife Status SGCN- Tier 2 USDA Forest No Region 1 Status Service No Region 4 Status USDI FWS No records found Other No BLM status Xerces Society- Vulnerable (At moderate risk of extinction due to a restricted range, relatively few populations (often 80 or fewer), recent and widespread declines, or other factors) Table 3. Status summary based on best available scientific information. Species (Scientific and Common Name): Margaritifera falcata (Western pearlshell) Criteria Rank Rationale Literature Citations 1 C Margaritifera falcata is known to occur in several streams on the See Table 1 Distribution on Salmon-Challis National Forest (see Table 1). This includes the Salmon Salmon-Challis River, Middle Fork Salmon River, Camas Creek, Loon Creek, Marsh Creek, National Forest Bear Valley Creek, and Elk Creek (see Table 1). The species may also occur in others stream on the Forest within the Salmon basin. Confidence in Rank: High, Medium, or Low Species (Scientific and Common Name): Margaritifera falcata (Western pearlshell) Criteria Rank Rationale Literature Citations 2 C M. falcata is widely distributed in western North America (NatureServe Idaho Department of Fish and Distribution in 2017), although viable populations are more sparsely distributed within Game, unpublished data surrounding its range. Populations can be found in watersheds from southeast Alaska (snorkeling data available at the geographic area to central California, extending east to Utah, Wyoming, and Montana Salmon-Region Office) (NatureServe 2017). Matsaw, S. Personal In Idaho, M. falcata has been observed in many locations across the state communication. March 23, 2018 including the Coeur d’Alene, St. Joe, and St. Maries rivers in northern Idaho; the Pahsimeroi, Lost, Lower Salmon, and Little Salmon rivers and Messner, J. Personal Hells Canyon in central Idaho; and upper tributaries of the Snake River communication. March 23, 2018 and the Blackfoot River in southern Idaho (Stagliano et al. 2007). NatureServe. 2017. NatureServe M. falcata has been observed in many areas immediately adjacent to the Explorer: An online encyclopedia of Salmon-Challis National Forest including locations in the Salmon River, life [web application]. Version 7.1. Big Lost River, and Little Lost River basins (Map 1; Messner, J. Personal NatureServe, Arlington, Virginia. communication. March 23, 2018; Matsaw, S. Personal communication. Internet website: March 23, 2018; Idaho Department of Fish and Game, unpublished data). http://explorer.natureserve.org. Accessed on December 22, 2017. In summary, M. falcata is widely distributed off the Forest. Stagliano, D. M., G. M. Stephens, Confidence in Rank: High, Medium, or Low and W. R. Bosworth. 2007. Aquatic Invertebrate Species of Concern on USFS Northern Region Lands. Prepared for USDA Forest Service, Northern Region. Montana Natural Heritage Program: Helena, MT. 161 pp. Species (Scientific and Common Name): Margaritifera falcata (Western pearlshell) Criteria Rank Rationale
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