. Assessment of aquatic habitats on the Matador Ranch Phillips Co., MT. Aquatic invertebrates; Stream ecology; Watershed ecology. Big Warm Creek (Bridge Site #1) Location: Accessed from 2-track past the Ranch House to the Hay Meadows. Ecoregion: Northern Glaciated Plains (Typical 42). Aquatic Ecological System Type: C006-Northern Glaciated Perennial Prairie Stream Key Environmental Factors: Hydrology—upstream dams or diversions in the watershed; depositional silted areas forming large Scirpus mats (Big Stem Bulrush), Grazing—no noticeable impacts. Rare or Unique Species: No SOC species, but na
. Assessment of aquatic habitats on the Matador Ranch Phillips Co., MT. Aquatic invertebrates; Stream ecology; Watershed ecology. Big Warm Creek (Bridge Site #1) Location: Accessed from 2-track past the Ranch House to the Hay Meadows. Ecoregion: Northern Glaciated Plains (Typical 42). Aquatic Ecological System Type: C006-Northern Glaciated Perennial Prairie Stream Key Environmental Factors: Hydrology—upstream dams or diversions in the watershed; depositional silted areas forming large Scirpus mats (Big Stem Bulrush), Grazing—no noticeable impacts. Rare or Unique Species: No SOC species, but native fish community + the freshwater mussel (Pyganodon grandis) and the PSOC river jewel wing damselfly (Calopteryx aequabilis). Rare Features: none. Introduced/Exotic Aquatic Species: None Overall Ecological Site Condition: Fair trending to Good This stream reach has a fair diversity of microhabitats including undercut banks, gravel runs, cobbles and aquatic vegetation, leading to a good fish community (6 native species). The reach is dominated by a long run with some side-depositional pools, it averaged m wide with channel depths of ~30cm. Macroinvertebrate Community Quality: MTDEQ MMI= 0/E= 80% The freshwater mussel, giant floater (Pyganodon grandis) population is doing very well (-75 individuals in the 50m reach surveyed) most of these are 3-5 year olds (40-50mm, right in photo), but there is evidence of recent recruitment, 1-2 yrs (20-30mm, left in photo). They are located in the gravel/silt interface where streamflow keeps the substrate clean. Host fish=brook stickleback r****9M*-B».. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Stagliano, David M. ,author; Poole, Linda; Montana Natural Heritage Program; Montana Natural Resource Information System; University of Montana--Missoula. [Hel
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