7996

• UCREFRP Catalog Number: 7996
• Author: Wydoski, R. S. and E. D. Wick.
• Title: Ecological Value of Flooded Bottomland Habitats to Endangered Fishes in the Upper Colorado River Basin.
• USFW Year: 1996.
• USFW - Doc Type: \
• Copyright Material: NO

~

\.

Table of Contents

Section Tooic

Paqe

1. Abstract 1

I!. Introduct ion 2

III. Ecological Functions of a Riverine System 3

IV. Relation of Nutrients, Sunlight Penetration, and
Warm Water Temperatures to Phytoplankton Production. 4

V. Importance of low Velocity Habitats to Zooplankton
Product ion . . . . . . . . . . . . . . . . . . .. 5

VI. Factors Affecting Distribution of Benthic Insects 6

VII. Benthic Production in Different Habitats of the
Middle Green River. . . . . . . . . . . 7

VIII. Relation of Food to larval Fish Survival 8

IX. Food Availability for larval Endangered Fishes in
the Upper Colorado River Basin . . . . . . . . 9

X. Role of Predation and Competition to the Survival
of larval Endangered Fishes . . . . . . . . . . 10

Potential Role of Predation on Survival of Fish

larvae . . . . . . . . . . . . . . . . . . . . .. 10

Potential Role of Competition on Survival of Fish

larvae . . . . . . . . . . . . . . . . . . . . .. 11

XI. loss of Critical low Water Velocity Habitats such
as Flooded Bottomlands in the Upper Colorado River

Bas in. . . . . . . . . . . . . . . . . . .. 11

XII. Strategies to Enhance or Restore Flooded Bottomland
Habitats in the Upper Colorado River Basin . . . .. 12

XIII. Integration of Habitat Enhancement/Restoration with
Control of Nonnative Fishes and Captive Propagation 15

Adequate Nonnative Fish Control is Essential for
Survival or Razorback Sucker larvae . . . . . 15

Captive Propagation May be the Only Short-Term
Solution. . . . . . . . . . . . . . . . . . . 16

i