7798

• UCREFRP Catalog Number: 7798
• Author: Richardson, S.
• Title: Conceptual Management Plan for Razorback Sucker Habitat Enhancement in Flooded Bottomlands, Escalante Ranch, Jensen, Utah.
• USFW Year: 1994.
• USFW - Doc Type: \
• Copyright Material: NO

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CONTENTS

Page

Introduction. . .

. 1

site

Description
General Features . ..........
Geology and Soils. . . . . . . . . . . . . .
Vegetation . . .. ...........
Fish and Wildlife Resources. . . . .
Land Management. . . . . . . . . .
Water Management . . . . . . .

. . 5

. .10

. . . . . .10

. .. ..15

. . . . . .17

. . . . . . 18

Conceptual Ecological Model
Relation of Nutrients, Sunlight Penetration
and Warm Water Temperatures to Phytoplankton

Production . . . . . . . . . . . . .. ...

Importance of Low Velocity Habitats to
Zooplankton Production . . . . . . . .
Major Limiting Factors Affecting Endangered
Colorado River Fish Populations. . . . .
Relation of Food to Larval Fish Survival
Food Availability for Larval Endangered
Fishes in the Upper Colorado River Basin. . . . . . . .29
Loss of critical Low Water Velocity Habitats
Such As Flooded BottomLands in the Upper
Colorado River Basin. . . . . . . . . . . . . . . . . .30

. .27

.28

. . . .29

. . . . . .29

Development Alternatives
Wetland Flow-through Alternative. . . . . . . . . . . .30
Wetland Backwater Alternative. . . . . . . . . . . . . .37
Wetland/Flooded Bottomland Development Alternative . . .41
Grow-out Pond Alternative. . . . . . . . . . . . . . . .47
No Action Alternative. .............. .52

Environmental Consequences
Wetland Flow-through Alternative. . . . . . . . . . . .53
Wetland Backwater Alternative. . . . . . . . . . . . . .54
Wetland/Flooded Bottomland Development Alternative. . .55
Grow-out Pond Alternative. . . . . . . . . . . . . . . .57
No Action Alternative. . . . . . . . . . .58

Evaluation and Monitoring .

. .59

References. .

. .62

Appendices. . .

. . . .66

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