WSP00036

• File Number: 8200.750
• Description: San Juan River General
• State: CO
• Basin: San Juan/Dolores
• Water Division: 7
• Date: 3/1/1975
• Author: BOR
• Title: San Juan Ecology Project - Interim Progress Report - March 1975
• Water Supply Pro - Doc Type: Report/Study

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TABLE OF CONTENTS

SECTION

1. INTRODUCTION

2. OBJECTIVES

3. ORGANIZATION

4. EPFECTS OF SNOWPACK VARIATION ON THE FOREST ECOSYSTEMS

4.1 INTRODUCTION
4.1.1 Study Areas
4.1.2 Microclimatic Data and Analyses
4.1.3 SutllDl.sry

4.2 PHENOLOGY
4.2.1 Herbaceous Phenology
4.2.2 Objectives
4.2.3 Procedures
4.2.4 Results
4.2.5 Future Plans

4.3 PHYTOSOCIOLOGY
4.3.1 Introduction
4.3.2 Objectives
4.3.3 Methods
4.3.4 Results
Indirect Gradient Analys~s
Direct Gradient Analysis
4.3.5 Discussion
4.3.6 Conclusion
4.3.7 Summary

4.4 TREE BIOMASS
4.4.1 Introduction and Objectives
4.4.2 Results and Discussion
Biomass and production of the Spruce-Fir Association
Influences of Snow on the Spruce-Fir Assoc1a~ion
4.4.3 Conclusions and Recommendations
4.4.4 Literature cited

4.5 MOISTURE STRESS
4.5.1 Specific Objectives
4.5.2 Methods
4.5.3 Results and Discussion
General Model Considerations
Midsummer Water Stress
Snowme1 t Period Water Stress
4.5..4 Proposed Future Research
4.5.5 Summary
4.5.6 Literature cited

4.6

ELK
4.6.1
4.6.2
4.6.3
4.6.4

Job 1.
Job 2.
Job 3.
Summary

Winter Distribution
Calving
Oak

4.7 SMALL MAMMALS
4.7.1 Introduction
4.7.2 Job 1. Litter Size and Survival
4.7.3 Job 2. Population Density
4.7.4 Job 3. Home Range
4.7.5 Job 4. Food Habits
4.7.6 Job 5. Reproductive Cycle
4.7.7 Job 6. Pocket Gopher Populations
4.7.8 Summary of Small Mammal Studies
4.7.9 Literature cited