7796

• UCREFRP Catalog Number: 7796
• Author: Burdick, B. D.
• Title: Conceptual Management Plan for Habitat Enhancement in Flooded Bottomlands, Escalante State Wildlife Area, Gunnison River Downstream of Delta, Colorado.
• USFW Year: 1994.
• USFW - Doc Type: \
• Copyright Material: NO

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TABLE OF CONTENTS
LIST OF FIGURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
LIST OF PHOTOS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Background . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Objectives/Purpose . . . . . . . . . . . . . . . . . . . . . . . . 2
SITE DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
General .............................. 3
Criteria and Rationale for Site Selection . . . . . . . . . . . . . 3
Land Management . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Water Management . . . . . . . . . . . . . . . . . . . . . . . . . 5
Stream Flows . . . . . . . . . . . . . . . . . . . . . . . . 5
Irrigation Practices at Escalante SWA . . . . . . . . . . . . 9
Fish and Wildlife Resources . . . . . . . . . . . . . . . . . . . . 9
CONCEPTUAL ECOLOGICAL MODEL 10
Relation of Nutrients, Sunlight Penetration, and Warm Water
Temperatures to Phytoplankton Production . . . . . . . 10
Importance of Low Velocity Habitats to Zooplankton
Production . . . . . . . . . . . . . . . . . . . 11
Major Limiting Factor Affecting Endangered Colorado River Fish
Populations . . . . . . . . . . . . . . . . . . . . . . 11
Relation of Food to Larval Fish Survival . . . . . . 12
Food Availability for Larval Endangered Fishes in the Upper
Colorado River Basin . . . . . . . . . . . . . . . . . 12
PROPOSED DEVELOPMENT/ACTION . . . . . . . . . . . . . . . . . . . . . . . 12
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Primary Development . . . . . . . . . . . . . . . . . . . . . . . . 13
Site1 ........................... 13
Site2 .......................... 16
Impacts of Development to Native Flora and Fauna . . . . . . . . . 18
PROPOSED OPERATION OF BOTTOMLANDS . . . . . . . . . . . . . . . . . . . . 19
Criteria for Operation . . . . . . . . . . . . . . . . . . . . 19
Potential Impacts from Operations on Native Flora and Fauna . . . . 20
PROPOSED EVALUATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Factors to be Evaluated . . . . . . . . . . . . . . . . . . . . . . 20
SiteI ........................... 20
Site2 .................... ..... 22
LITERATURE CITED . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
APPENDIX A
Photographs of the Escalante State Wildlife Area . . . . ._. . . . 29
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