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Table 23A.-The concentration of phytoplankton (>25-µm size-fraction) at Cibola for phases 1 and 2 (Oct. 1986 to Aug. 1988). cn 00 TAXA Phase 1 Phase 2 10/20 12/3 1/5 2/9 3/16 4/20 5/19 6/22 10120 1/26 3/15 5/4 6/30 8/23 Bacillariophyta (diatoms) c c c c a a va a c a c a a a Chlorophyta (green algae) c p p - p a - c p c c p c p Chrysophyta (yellow-brown algae) - - - - p - - c - - p Cyanophyta (blue-green algae) c p - - - - c c p c p Euglenophyta (euglenoids) - - P P - - - - - Pyrrhophyta (dinoflagellates) - - - - - - - - p c c c c - Rhodophyta (red algae) Plant material c - p - c c - - - - - p = present (1-100 No./L) c = common (101-1000 No./L) a = abundant (1001-6000 No./L) va = very abundant (>60G1 No./L) Table 24A.-The concentration of phytoplankton (>25-µm size-fraction) at Imperial Dam for phases 1 and 2 (Oct. 1986 to Aug. 1988). TAXA Phase 1 Phase 2 10/20 12/3 1/5 2/9 3/16 4/20 5/20 6/22 10/20 1/27 3/16 5/4 6/27 8/24 Bacillariophyta (diatoms) a a c a a a - a c c c a a c Chlorophyta (green algae) a c c - - c c c c c c a - Chrysophyta (yellow-brown algae) - - - - - - - - p c Cyanophyta (blue-green algae) p - - - - - c - c P - Euglenophyta (euglenoids) Pyrrhophyta (dinoflagellates) p - - - - - c c c c c - - - Rhodophyta (red algae) Plant material c - - - - c - - - - - p = present (1-100 No./L) c = common (101-1000 No./L) a = abundant (1001-6000 No./L) va = very abundant (>6001 No. /L)