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• <br />Table 4,0-2. Relative abundance and replicate densTtie~ (no./cm2) of periphyton genera collected at • <br />station C in the North Fork Gunnison River, November 11 and 12, 1980. <br />A <br />A <br />Letter Prefixes <br />A = <br />C= <br />D= <br />E _ <br />G= <br />South <br />Taxa Name ~ Abund~ <br />Before Each Taxon Indicate Algal Division: <br />Chrysophyta (Diatoms, etc.) <br />Chlorophyta (greens) <br />Euglenophyta (Euglenoids) <br />Cyanophyta (blue-greens) <br />Pyrrophyta (golden-browns) <br />Middle North Mean Values <br />once ~ Abundance % Abundance % Abundance Mean Rank <br />A Amphipleura 4.0 2.5 3.5 3.3 9 <br />A Fragilaria 6.5 2.0 0.5 3.0 10 <br />A Navicula 8.0 7.0 5.0 6.7 6 <br />E Calothrix 2.5 0.0 0.0 0.8 12 <br />A Diatoma 7.5 11.0 10.5 9.7 4 <br />A Epithemia 4.0 3.5 4.0 3.8 8 <br />A Achnanthes 17.0 15.0 15.0 15.7 3 <br />E Schizothrix 23.0 18.5 22.5 21.3 1 <br />A Cymbella 3.5 9.5 11.0 8.0 5 <br />A Nitzschia 16.0 20.5 16.5 17.7 2 <br />A Gomphonema T.5 2.0 4.0 2.8 11 <br />A Cocconeis 6.5 7.0 4.0 5.8 7 <br />E Unidentified Cyanophyta 0.0 1.5 0.0 0.5 13 <br />A Synedra 0.0 0.0 1.0 0.3 14 <br />A Melosira 0.0 0.0 2.5 0.8 12 <br />Total Densities (no./cm2) 1,271,143 702,907 971,844 981,965 <br />Total Units Counted 200 200 200 <br />Total Taxa Counted 12 12 .14 <br />