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A checklist of the benthic macroinvertebrate taxa collected <br />from Foidel Creek is presented in Table 23, along with the <br />number of each taxon by station. Summary of the date and <br />diversity at each station are presented in Table II-4. <br />Water flow and stream width at both stations in Foidel Creek <br />on September 8, 1975, were insufficient to allow the <br />collection of benthic organisms. Therefore, the discussion <br />that follows reflects only two benthal samples from this <br />drainage. <br />The total number of individuals increased in the downstream <br />direction (Table 22). The most significant faunal change <br />was the increase in importance of Diptera at the lower sta- <br />tion, which accounted for approximately 58 percent of the <br />organisms collected at the upper station on Foidel Creek. <br />This increased to approximately 79 percent at the lower sta- <br />tion. The faunal change between stations probably resulted <br />from differences in the substrata, the abundance of aquatic <br />macrophytes, and possible change in various physical and <br />chemical parameters. Among the latter, temperature, water <br />velocity, pH, dissolved oxygen, total dissolved solids, and <br />importance of shading commonly influence the benthic com- <br />munity (Hynes 1960, 1970). <br />Threatened and Endangered Species <br />The lease application areas do not contain any T/E species <br />nor will the tract affect any T/E species downstream. <br />4. Aquatic Life (application C-22676) <br />Fisheries <br />Fish Creek and Trout Creek r~adjacent to the subject <br />109 <br />