Annual monitoring report : Bruneau hot-spring springsnail (Pyrgulopsis bruneauensis)

56 Pages·1996·2.9 MB·English

by  Varricchione, Jeffrey T

5 MONITORING REPORT:
BRUNEAU HOT-SPRING SPRINGSNAH
(PYRGULOPSIS BRUNEAUENSIS)
F
by
Jefrey T. Varricchione
G. Wayne Minsk all
QL
84.2
.L352
no.96-£
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CAL BULLETIN NO. 96-8 IDAHO BUREAU OF LAND MANAGEMENT May 1996
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ANNUAL MONITORING REPORT
Bruneau Hot-spring Springsnail (Pyrgulopsis bruneauensis)
Jeffrey T. Varricchione and G. Wayne Minshall
Stream Ecology Center
Department of Biological Sciences
Idaho State University
Pocatello, Idaho 83209
20 March 1996
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Table of Contents
List of Figures.ii
List of Tables...'.iii
Summary. 1
Introduction.2
Methods.3
Site Description. 3
Size Distribution.6
Population Fluctuations.7
Discharge, Temperature, and Water
Chemistry Fluctuations.7
Periphyton Levels.9
Habitat Assessment At Hot Creek.10
Results.11
Size Distribution.11
Population Fluctuations.18
Discharge, Temperature, and Water
Chemistry Fluctuations.21
Periphyton Levels.26
Conditions At Indian Bathtub And Hot Creek.3 0
Recommendations.3 3
Literature Cited.35
Appendix. ..3 7
A. Idaho Department of Health and Welfare's
Habitat Assessment Field Data Sheet for
Lowland Streams.3 7
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List of Figures
Figure 1. Locations of the springsnail study sites.4
Figure 2. Location of the temperature data loggers
at the three study sites.5
Figure 3a-f. Size histograms for snail populations from
the three study sites.12
Figure 4. Snail abundance at the study sites.19
Figure 5. Discharge and maximum temperature at
Site 1 (Hot Creek).22
Figure 6. Maximum/minimum water temperatures at the
monitoring sites.23
Figure 7. Water chemistry of the monitoring sites.24
Figure 8. Chlorophyll a of periphyton for the study
sites.27
Figure 9. Periphyton biomass (as AFDM) for the study
sites.28
Figure 10. Particle size and embeddedness distributions
for Hot Creek (Site 1).32
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List of Tables
Table 1. Springsnail habitat at the spring sites
(Sites 2, 3, and 3 New Seep).'.25
Table 2. Habitat assessment scores for Site 1
(Hot Creek)...25
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