Aquatic surveys and assessment of the Slim Buttes region of Harding and Butte Co., SD E7B0A490-9C23-4F66-8B12-C76B17101B65 Year: 2006 Habitat Evaluations On-site habitat assessments were conducted using the rapid assessment protocol (RBP Level 1, scores 0-200) developed for the EPA by Barbour et al. (1999) with modifications and additions by the National Aquatic Assessment of the Bureau of Land Management (BLM) Buglab (scores 0-24) (wwwl ( http://wwwl ) . ). Using the BLM assessment protocols, the reach was divided into 10 equally spaced transect
Aquatic surveys and assessment of the Slim Buttes region of Harding and Butte Co., SD E7B0A490-9C23-4F66-8B12-C76B17101B65 Year: 2006 Habitat Evaluations On-site habitat assessments were conducted using the rapid assessment protocol (RBP Level 1, scores 0-200) developed for the EPA by Barbour et al. (1999) with modifications and additions by the National Aquatic Assessment of the Bureau of Land Management (BLM) Buglab (scores 0-24) (wwwl ( http://wwwl ) . ). Using the BLM assessment protocols, the reach was divided into 10 equally spaced transects. Parameters recorded at each were: wetted width, bankfull width, 3 channel depth measurements, large woody debris and riparian shading. Basic water chemistry parameters (temperature, pH, conductivity, dissolved O^and turbidity) were recorded prior to sampling using the Horiba H-10. The goal of these evaluations is to characterize local reach geomorphology, riparian and in-stream habitat, and other characteristics that influence aquatic community integrity (Figure 5). The sites ranking higher using these protocols are determined to have higher quality local-scale habitat. Habitat assessments were performed during the same visit as the biological sampling. Figure 5. Channel depth measurement as part of the habitat and geomorphic assessments. Fish Communities Fish sampling protocols (MTFWP 2003) required the positioning of upstream and downstream block nets at the ends of the reach (300m or 40x wetted width), but most of the time shallow sections and/or riffle areas were sufficient to prevent fish from escaping while the run & pool areas were being seined from the upstream to the downstream direction with a 20-30 ft Va inch straight seine, depending on wetted width (Figure 6). Fish were transferred to holding buckets, identified to species, enumerated in the field, examined for external anomalies ( deformities, eroded fins, lesions, and tumors), and then released (Figure
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