Volume 36(2)

Journal
of the
Arizona-Nevada Academy of Science


CONTENTS

Editor’s Note iii
A Comparison of Saguaro Regeneration on Slopes and Flats in Saguaro National Park and in South Mountain, Arizona
    Taly Dawn Drezner
63
Tree Thinning and Prescribed Burning Effects on Ground Flora in Arizona Ponderosa Pine Forests: A Review
    Scott R. Abella
68
Reproduction in the Western Terrestrial Garter Snake, Thamnophis elegans (Serpentes: Colubridae) from Arizona
    Stephen R. Goldberg
77
Stream Channel Change in Response to Cattle Exclosures in Semi-Arid Central Arizona
    Rebecca Beard
81
Modulation of the Winter ENSO Arizona Climate Signal by the Pacific Decadal Oscillation
    Gregory B. Goodrich
88
Spatial Variability in Saguaro Growth from a Serendipitous Timeline in the Sonoran Desert
    Kathryn Mauz
95
Effective and Bankfull Discharge in Great Basin National Park, Nevada
    Richard L. Orndorff and Lisa A. Glonek
103
Effect of Organic and Rock Mulches on the Moisture and Temperature of Arizona Soils
    Donald F. Post, Allan H. Matthias, Abdul K. Batchily, H. Hosler and R. Huebner
111
On the Status of the Opossum (Didelphis virginiana) in Arizona
    Randall D. Babb, David E. Brown, and Jack L. Childs
120
The Urban Desert: A Temporal Study of Humidity Values in the Phoenix Metropolitan Area
    P. Grady Dixon
127
Book Reviews
139

2004
Published by the
Arizona-Nevada Academy of Science