. Baseline assessment and analysis of fish, macroinvertebrates and herpetofauna in the Otter Creek coal tracts area of Powder River County. Aquatic ecology; Aquatic invertebrates; Fishes; Amphibians; Reptiles. was largely derived for mountain streams. All six a priori stream reaches were visually surveyed for amphibians or reptiles during all visits. Figure 1. Discharge reported at the USGS gage in Ashland, MT. Arrows indicate sampling dates. ^ 8 0 i H _l H c Jan 2611 USGS ©6307749 Otter Creek at Ashland MT. Har 2011 Hay 2011 Sep 2611 Mow 2011 Daily nean discharge • Flow at st
. Baseline assessment and analysis of fish, macroinvertebrates and herpetofauna in the Otter Creek coal tracts area of Powder River County. Aquatic ecology; Aquatic invertebrates; Fishes; Amphibians; Reptiles. was largely derived for mountain streams. All six a priori stream reaches were visually surveyed for amphibians or reptiles during all visits. Figure 1. Discharge reported at the USGS gage in Ashland, MT. Arrows indicate sampling dates. ^ 8 0 i H _l H c Jan 2611 USGS ©6307749 Otter Creek at Ashland MT. Har 2011 Hay 2011 Sep 2611 Mow 2011 Daily nean discharge • Flow at station affected by ice — Estinated daily nean discharge ^—Period of provisional data ^^ Period of approved data Riparian Assessments The assessment stream reach was divided into 10 equally spaced transects according to BLM and EMAP protocols (BLM 2008b; Lazorchak et al. 1998). The downstream transect was marked (GPS, flagging and photo point) as the bottom of the reach and all ecological assessment protocols started from this point and continued upstream for 300m (designated the assessment area or "AA") to the top of the reach which was also marked. Parameters recorded at each transect were: wetted width, three channel depth measurements, % large woody debris and riparian shading. On-site habitat assessments were conducted using the rapid assessment protocol developed for the EPA by Barbour et al. (1999) with modifications for the BLM by the National Aquatic Assessment Team (scores 0-24) (BLM 2008). The process for determining Proper Functioning Condition followed Pritchard et al. (1993). Basic water parameters (temperature, pH, conductivity) were recorded prior to biological sampling using a Horiba H-10 water monitor, calibrated for the higher conductivity range. The Livestock Use Index ("Cowpie" CPI) was assessed by walking a randomly chosen 75m reach on both sides of the stream channel in the riparian area within the assessment area and counting all
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Keywords: ., bo, booksubjectamphibians, booksubjectfishes, booksubjectreptiles
