9628

• UCREFRP Catalog Number: 9628
• Author: Gloss, S. P., J. E. Lovich and T. S. Melis.
• Title: The State of the Colorado River Ecosystem in Grand Canyon - A Report of the Grand Canyon Monitoring and Research Center 1991-2004.
• USFW Year: 2005.
• USFW - Doc Type: \
• Copyright Material: NO

viii

Contents

Ove rvi ew .......................................................................................................................................... .............. 1

Lara M. Schmit, Steven P. Gloss, and Christopher N. Updike

Chapter 1. Influence of Glen Canyon Dam Operations on
Downstream Sand Resources of the Colorado River in Grand Canyon ........................................... 17
Scott A. Wright, Theodore S. Melis, David J. Topping,
and David M. Rubin

Chapter 2. Fishes of Grand Canyon ...................................................................................................... 33
Steven P. Gloss and Lewis G. Coggins
With text box by Jeffrey E. Lovich...................................................................................................50

Chapter 3. Climatic Fluctuations, Drought, and Flow

in the Colora do Rive r .................. ........... ....................................................................... .............................. 57

Robert H. Webb, Richard Hereford, and Gregory J. McCabe

Chapter 4. Water Quality in Lake Powell and the Colorado River ................................................... 69
William S. Vernieu, Susan J. Hueftle, and Steven P. Gloss

Chapter 5. Aquatic Ecology: the Role of Organic Matter

and I nve rte b rate s ....................................................................................................................................... 87

Theodore A. Kennedy and Steven P. Gloss

Chapter 6. Riparian Vegetation and Associated Wildlife................................................................ 103
Barbara E. Ralston
With text box by Cha rles D rost ...................................................................................................... 116

Chapter 7. Birds of the Colorado River in Grand Canyon:
a Synthesis of Status, Trends, and Dam Operation Effects ...............................................................123
Jennifer A. Holmes, John R. Spence, and Mark K. Sogge

Chapter 8. Debris Flows in Grand Canyon and the Rapids

of the Colorado Rive r ..................... ........................................................................................................... 139

Robert H. Webb, Peter G. Griffiths, Christopher S. Magirl,
and Thomas C. Hanks

Chapter 9. Recreation Use Values and Nonuse Values
of Glen and Grand Canyons .................................................................................................................... 153
John Loomis, Aaron J. Douglas, and David A. Harpman