Contents
Introduction and Keynote Address .................................................................................................................. 1
E. Durant McArthur
Stewart C. Sanderson
Ecotones: Introduction, Scale, and Big Sagebrush Example.......................................... 3
Ecotones and Hybrid Zones ............................................................................................................................... 9
John H. Graham
D. Carl Freeman
Han Wang
E. Durant McArthur
Ecological Analysis of the Big Sagebrush Hybrid Zone ................................................ 11
D. Carl Freeman
Kathleen J. Miglia
E. Durant McArthur
John H. Graham
Han Wang
Narrow Hybrid Zone Between Two Subspecies of
Big Sagebrush (Artemisia tridentata: Asteraceae):
X. Performance in Reciprocal Transplant Gardens ...................................................... 15
Bruce N. Smith
Susan Eldredge
David L. Moulton
Thomas A. Monaco
Angela R. Jones
Lee D. Hansen
E. Durant McArthur
D. Carl Freeman
Differences in Temperature Dependence of Respiration
Distinguish Subspecies and Hybrid Populations of Big Sagebrush:
Nature Versus Nurture .................................................................................................. 25
James A. Young
Charlie D. Clements
Ecotones Between Artemisia nova and A. tridentata Plant
Communities in the Buckskin Mountains of Western Nevada ...................................... 29
Scott C. Walker
Deborah Turley
Characteristics of Mountain Mahogany (Cercocarpus) Species and
Hybrids in Utah Hybrid Zone ......................................................................................... 32
Merrill Webb
Occurrence of Birds on a Great Basin-Mohave Desert Ecotone in
Southwestern Utah ....................................................................................................... 35
Jack D. Brotherson
Measured and Inferred Moisture Gradient Relationships Across
Ecotone Boundaries in Shrub-Dominated Foothill Communities .................................. 40
Warren P. Clary
Dean E. Medin
Riparian Zones—The Ultimate Ecotones? .................................................................... 49
Thomas A. Eddy
Ecotonal Dynamics of the Invasion of Woody Plants into the Tallgrass Prairie ............ 56
Stanley G. Kitchen
E. Durant McArthur
Gary L. Jorgensen
Species Richness and Community Structure Along a Great Basin
Elevational Gradient ...................................................................................................... 59
Eugene W. Schupp
Jeanne C. Chambers
Stephen B. Vander Wall
José María Gómez
Marcelino Fuentes
Piñon and Juniper Seed Dispersal and Seedling Recruitment at
Woodland Ecotones ...................................................................................................... 66
Robin J. Tausch
Robert S. Nowak
Fifty Years of Ecotone Change Between Shrub and Tree Dominance
in the Jack Springs Pinyon Research Natural Area ...................................................... 71
Paul T. Tueller
Approaches to Mapping Ecotone Boundaries Using Emerging
Remote Sensing Technology ........................................................................................ 78
R. F. Beck
R. P. McNeely
R. P. Gibbens
Mesquite-Grassland Ecotones in the Chihuahuan Desert ............................................ 84
Sherel Goodrich
E. Durant McArthur
Alma H. Winward
Sagebrush Ecotones and Average Annual Precipitation .............................................. 88
Population Biology ............................................................................................................................................. 95
D. Terrance Booth
Yuguang Bai
James T. Romo
Freezing Tolerance of Imbibed Winterfat Seeds: Possible
Mechanisms and Ecotypic Differences ......................................................................... 97
Inés Ibáñez
Eugene W. Schupp
Janis L. Boettinger
Successional History of a Curleaf Mountain Mahogany Stand:
a Hypothesis ............................................................................................................... 102
J. L. Downs
R. A. Black
Leaf Surface Characteristics and Gas Exchange in
Artemisia tridentata subspecies wyomingensis and tridentata ................................... 108
Simon A. Lei
Phenological Events and Litterfall Dynamics of Blackbrush in
Southern Nevada ........................................................................................................ 113
Jasleen Kaur
K. M. M. Dakshini
Biodiversity in the Management of the Shrub Zizyphus nummularia
with Special Reference to Semiarid Regions in India ................................................. 119
Bilquees Gul
Darrell J. Weber
M. Ajmal Khan
Population Dynamics of a Perennial Halophyte Allenrolfea occidentalis .................... 124
Community Ecology ......................................................................................................................................... 131
James A. Young
Charlie D. Clements
Native Perennial Grass Communities of the Carson Desert of
Northwestern Nevada ................................................................................................. 133
W. K. Ostler
D. J. Hansen
D. B. Hall
The Classification of Shrublands on the Nevada Test Site ......................................... 137
D. J. Hansen
W. K. Ostler
D.B. Hall
The Transition from Mojave Desert to Great Basin Desert on the
Nevada Test Site ........................................................................................................ 148
Sherel Goodrich
Dwain Nelson
Natalie Gale
Some Features of Wyoming Big Sagebrush Communities on Gravel
Pediments of the Green River in Daggett County, Utah ............................................. 159
Deborah Turley
Bruce A. Roundy
Scott C. Walker
Twig Demography of True Mountain Mahogany
(Cercocarpus montanus Scop.) .................................................................................. 168
Bruce L. Welch
Add Three More to the List of Big Sagebrush Eaters ................................................. 171
Stanley G. Kitchen
Gary L. Jorgensen
Annualization of Rodent Burrow Clusters and Winterfat Decline
in a Salt-Desert Community ........................................................................................ 175
Allen Huber
Sherel Goodrich
Big Sagebrush, Crested Wheatgrass, and Grazing on Gravel-Cobble
Pediments of the Duchesne River Formation and Quaternary
Deposits in Uintah County, Utah ................................................................................. 181
Andrés F. Cibils
Richard H. Hart
David M. Swift
Shrub-Grass Interactions in Relation to Cattle Grazing in
Rex G. Cates
Jiping Zou
Stuart C. Wooley
Francis J. Singer
Lauryl C. Mack
Linda Zeigenfuss
Predisposition of Willows to Elk Browsing Due to Willow Interactions
with Abiotic Factors ..................................................................................................... 191
Sherel Goodrich
E. Durant McArthur
Allen Huber
Jeffrey E. Ott
Ungulate Browsing of Two Populations of Rubber Rabbitbrush ................................. 196
C. J. Murray
L. L. Cadwell
J. L. Downs
M. A. Simmons
Fusing Vegetation Data Sets to Provide a Spatial Analysis of
Sage Grouse Habitat on the Army’s Yakima Training Center ..................................... 200
Steven A. Lei
Simon A. Lei
Leslie J. Thomas
Ecological Leaf Anatomy of Seven Xerophytic Shrub Species
in Southern Nevada .................................................................................................... 206
Steven A. Lei
Simon A. Lei
Ecology of Psammophytic Plants in the Mojave, Sonoran, and
Great Basin Deserts .................................................................................................... 212
Simon A. Lei
Effects of Severe Drought on Biodiversity and Productivity in a
Creosote Bush-Blackbrush Ecotone of Southern Nevada .......................................... 217
J. H. Kaltenecker
M. C. Wicklow-Howard
R. Rosentreter
Biological Soil Crusts in Three Sagebrush Communities
Recovering from a Century of Livestock Trampling ................................................... 222
M. Ajmal Khan
Bilquees Gul
Seed Bank Strategies of Coastal Populations at the Arabian Sea Coast ................... 227
Sara J. Manning
The Effects of Water Table Decline on Groundwater-Dependent
Great Basin Plant Communities in the Owens Valley, California ................................ 231
Atriplex canescens ...................................................................................................... 186
Carl L. Wambolt
Trista L. Hoffman
Chris A. Mehus
Response of Shrubs in Big Sagebrush Habitats to Fire on the
Northern Yellowstone Winter Range ........................................................................... 238
Community Rehabilitation and Restoration ............................................................................................... 243
Rosemary L. Pendleton
Burton K. Pendleton
Steven D. Warren
Response of Blackbrush (Coleogyne ramosissima) Seedlings to
Inoculation with Arbuscular Mycorrhizal Fungi ............................................................ 245
J. R. Barrow
I. Feder
H. C. Monger
The Role of Endophytic Fungi in the Survival and Establishment of
Fourwing Saltbush (Atriplex canescens [Pursh] Nutt.) in an Arid Environment .......... 252
Donald J. Bedunah
Michael G. Harrington
Dayna M. Ayers
Antelope Bitterbrush and Scouler’s Willow Response to a
Forest Restoration Project .......................................................................................... 256
Derek B. Hall
David C. Anderson
Reclaiming Disturbed Land Using Supplemental Irrigation in the
Great Basin/Mojave Desert Transition Region After Contaminated
Soils Remediation: the Double Tracks Project ............................................................ 260
Mary Dudley
Volunteers and Planting Techniques for Restoring Southwestern Idaho
Riparian Habitats ........................................................................................................ 266
Alison Stewart
Val Jo Anderson
Stanley G. Kitchen
‘Immigrant’ Forage Kochia (Kochia prostrata) Seed Germination as
Affected by Storage Conditions .................................................................................. 274
Chad S. Horman
Val Jo Anderson
Effects of Utah Juniper (Juniperus osteosperma [Torr.] Little) Litter
Leachate on Germination of Several Range Plant Species ........................................ 280
Paul R. Jones
Marcia Wicklow-Howard
Mike Pellant
Restoration of the Moss (Musci) Component of the Microbiotic Crust
to the Western Snake River Plain, Idaho: Inoculation of Fragmented
Arid-Land Moss Tissue to Three Rangeland Soil Surface Treatments ....................... 283
A. L. Hild
B. Christensen
A. Maier
Wyoming Big Sagebrush (Artemisia tridentata ssp. wyomingensis)
Seedling Growth and Maternal Plant Stand Position .................................................. 287
Field Trip ............................................................................................................................................................. 291
E. Durant McArthur
Stephen B. Monsen
Richard Stevens
Field Trip Report: Shrubland Ecotones ....................................................................... 293