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• Sorted organisms were placed is 70 percent isopropyl alcohol with gly- <br /> cerine. Samples were then identified and enumerated with the aid of a <br /> dissecting microscope (7-80X). Specimens of the family Chironomidae <br />(midge larvae) were mounted on microscope slides is CMC-10 mounting medium and <br />identified under a compound microscope. Identifications were made to <br />the lowest taxonomic level practicable using the following references: <br />Usiager 1956, Edmonsoa 1959, Briakhurst 1968, Beck 1976, Edmunds et al. <br />1976, Wiggins 1977, and Pennak 1978. <br />Data calculated were density (1f/ft2), percent relative abundance, <br />diversity (d), maximum diversity (d max), and equitability (E). Cal- <br />culation of species diversity were based on Shaaaaa and Wiener (1963). <br />Computational equations were as follows: <br />Species Diversity (d) <br />• s n. a. <br />d = E N1 loB2 Ni <br />1 <br />Where: ai = number of individuals per taxoa <br />N = total number of organisms per sample <br />Maximum Diversity (dmax <br />dmax = 1082 S <br />Where: S = number of species <br />Equitability (E) <br />E=d <br />dmax <br />Where: d = observed species diversity <br />d = calculated maximum diversity <br />• <br />