8132

• UCREFRP Catalog Number: 8132
• Author: Lieberman, D. and T. Burke.
• Title: Limnology and Drift of Particulate Organic Matter Through the Lower Colorado River.
• USFW Year: 1991.
• USFW - Doc Type: Denver, CO.
• Copyright Material: NO

Table 29A.-The concentration of phytoplankton and zooplankton (>505-µm size-fraction) at Headgate Rock
Dam for phase 1 (Jan. 1987 to June 1987).
Phytoplankton Taxa 1/5 2/9 3/17 4/20 5/18 6/22
Bacillariophyta (diatoms) a p p c va va
Chlorophyta (green algae) a p va p va
Cyanophyta (blue-green algae) c p p p va
Pyrrhophyta (dinoflagellates)
Rhodophyta (red algae)
Macrophyta a p p a p
p = present (1-100 No./L)
c = common (101-1000 No. /L)
a = abundant (1001-6000 No./L)
va = very abundant (>6001 No./L)
Zooplankton Taxa 1/5 2/9 3/17 4/20 5/18 6/22
Nauplius
Diaptomus spp.
Bosmina sp.
Daphnia spp.
Daphnia eggs
Leptodora kindtii
Animal Fragments
p
p
c p
va va va a va
a va c a
p p c
a
a
a
a
p = present (1-5 individuals/L)
c = common (6-15 individuals/L)
a = abundant (16-25 individuals/L)
va = very abundant (>25 individuals/L)
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