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

CONTENTS
Page
Introduction .................................. .............................................. 1
M anage m entImplications .................................................................. 1
Methods .................................................................................... 1
Study Area ............................................................................... 1
Sampling Stations ......................................................................... 3
Sampling Techniques ...................................................................... 3
Physical-Chemical Parameters ............................................................. 3
Biological Parameters . .................................................................. 4
Chlorophylla ........................................................................... 4
Particulate matter ....................................................................... 4
Results - Phase 1 ........................................................................... 4
Physical-Chemical Parameters ............................................................. 4
Biological Analyses ........................................................................ 8
Chlorophylla ........................................................................... 8
Phytoplankton .......................................................................... 9
Zooplankton ............................................................................ 10
Particulate Organic Matter ................................................................. 11
Results - Phase 2 .......................................................................... 16
Impoundments/Reservoirs ................................................................. 16
Backwaters ............................................................................... 18
Agricultural Drains ........................................................................ 20
Sediment Sluicing ......................................................................... 22
Storm Events ............................................................................. 23
Discussion .................................................................................. 23
Summary ................................................................................... 27
Bibliography ................................................................................ 29
Appendix A: Tables 1 A through 50A .......................................................... 33
Table
TABLES
1 Range, mean x, and standard deviation s of field measurements for phase 1 (Oct. 1986 to
June 1987) .......................................................................... 6
2 Range, mean x, and standard deviation s of phosphorus and nitrogen concentrations for
phase 1 (Oct. 1986 to June 1987) ..................................................... 7
3 Range, mean x, and standard deviation s of chlorophyll a concentration for phase 1
(Oct. 1986 through June 1987) ........................................................ 8
4 The percentage of <25-µm size-fraction chlorophyll a and >25-µm size-fraction chlorophyll a
concentration for phase 1 (Oct. 1986 through June 1987) ............................... 9
5 F-test results based on ANOVA between all stations and mean total chlorophyll a
concentration for phase 1 (Oct. 1986 through June 1987) ................................ 9
6 Number of phytoplankton species found in the <25-µm and >25-µm size-fractions on the
lower Colorado River ................................................................. 10
7 Zooplankton species collected from all stations in the lower Colorado River
(Oct. 1986 through Aug. 1988) ........................................................ 11
8 F-test results based on ANOVA between all stations and <25-µm dry weight (DW), and
<25-µm POM for phase 1 (Oct. 1986 through June 1987) ............................... 12
9 F-test results based on ANOVA between all stations and >25-µm dry weight (DW), and
...............................
>25-µm POM for phase 1 (Oct. 1986 through June 1987) 13