Assessment of aquatic macroinvertebrates in USFS - BLM Lands of the Crooked and Sage Creek Watersheds (electronic resource) (2009) (20354416925)

Title: Assessment of aquatic macroinvertebrates in USFS / BLM Lands of the Crooked and Sage Creek Watersheds (electronic resource)
Identifier: Bd3f4740-ef16-4583-bf24-57c558e12345 (find matches)
Year: 2009 (2000s)
Authors: Stagliano, David M; Montana Natural Heritage Program; United States. Forest Service
Subjects: Bycatches; Bycatches (Fisheries); Evaluation
Publisher: Helena (Mont. ) : Montana Natural Heritage Program
Contributing Library: Montana State Library



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Site Descriptions Management/Threats to these ecological systems include: Grazing and livestock use around the riparian areas occurs and can have strong local effects resulting in sedimentation and stream widening at cattle crossings. Introductions of game or forage fish in downstream reaches or anywhere in the watershed can make their way upstream to these foothills rivers and become permanent residents. Crooked Creek (Mainstem Site #1 below Fish Barrier) Location: Accessed from 4-wheel drive trail from Demijohn Flat dropped into barrier site and walked downstream ~200m to the first riffle/pool set designated the top of the lower reach then went 150 m down to start sampling in the upstream direction. Nearest Town: Lovell, WY Ecoregion: Wyoming Basin (Typical) Aquatic Ecological System Type: COOly. Key Environmental Factors: Upstream Riparian Grazing in the tributaries- substantial impacts, introduced fish populations. Riparian Modifications- moderate, recovering. Rare or Unique Species: No rare species, but a diverse foothills macroinvertebrate assemblage including Helichus striatus, a Dryopid riffle beetle found only at this site. Rare Features: An aesthetic canyon with oasis-type qualities and a native Yellowstone cutthroat throat population. Introduced/Exotic Aquatic Species: Introduced fish—Rainbow Trout reported in this reach below barrier (FWP MFISH, USFS pers. com.) Overall Ecological Site Condition: Good Reach Summary: The 150m reach consisted of 3 riffle/run/pool complexes with riffle/run geomorphology dominating the reach (125m) averaging 0.20m in depth. The mid and lower complex contain 8-10m long pools averaging 0.4m in depth, and contained good fish holding habitat. This stream reach lacked a diversity of microhabitats, cobbles dominated the substrate (70% of transects) and lacked undercut banks or large woody debris. The substrate of the pool was gravel/pebble dominated with some silt and cobbles. Vegetation coverage along the riparian stream channel was dominated by trees & shrubs and largely intact. Livestock use index (LUI) was absent with 0 cow pies counted on a 75m walk of both left and right banks. Reach Riparian Ranking: BLM= 92% (22 of 24) Macroinvertebrate Community Quality: MTMMI= 70.8
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