Session: Arid and semi-arid systems (ESA/SER Joint Meeting (August 5 -- August 10, 2007))

PS 3-28

Biogeography of microbiotic crusts in Joshua Tree National Park
Nicole Pietrasiak, University of California; Jeffrey R. Johansen, John Carroll University; Tasha La Doux, National Park Service

PS 3-29

Annual CO₂ flux from a biological soil crust system on the Colorado Plateau: Effects of increased temperature and summer precipitation
David C. Housman, CALIBRE; Edmund E. Grote, U.S. Geological Survey; Jayne Belnap, U.S. Geological Survey

PS 3-30

Photosynthetic responses of desert mosses to temperature and hydration
Kirsten K. Coe, Cornell University; Jayne Belnap, U.S. Geological Survey; Jed P. Sparks, Cornell University

PS 3-31

Temporal fluctuations in shrub-associated annual plant communities in the Mojave Desert
Hadas A. Parag, Rutgers University; Claus Holzapfel, Rutgers University

PS 3-32

Plant community structure of the Upper Las Vegas Wash, Nevada: The influences of geomorphology and soil physical and chemical properties
Amy A. Croft, Utah State University; James A. MacMahon, Utah State University; Janis L. Boettinger, Utah State University; Thomas C. Edwards, Utah State University; Glen Busch, Utah State University

PS 3-33

Contrasting water-use patterns among coastal semiarid plant species
Cristina Armas, Universidad de La Serena & Institute of Ecology and Biodiversity; Francisco M. Padilla, Radboud University; Francisco I. Pugnaire, Consejo Superior de Investigaciones Cientificas; Robert B Jackson, Duke University

PS 3-34

Where does the water come from? A case study of two endangered plant species
Niles J. Hasselquist, University of California, Riverside; Michael F. Allen, University of California

PS 3-35

Microhabitat is critical for sugar pine emergence and survival in a xeric Jeffrey pine dominated forest
Elaine C. Hager, University of Nevada, Reno; Stephen B. VanderWall, University of Nevada, Reno

PS 3-36

Saguaro mortality 10 years after the River Fire, Arizona
Ruth C. Wilson, California State University, San Bernardino; Marcia Narog, USDA Forest Service

PS 3-37

Assessing the spatiotemporal patterns of primary production in the Central Arizona-Phoenix region using remotely sensed data
Alexander Buyantuyev, Arizona State Universirty; Jianguo Wu, Arizona State University

PS 3-38

Influence of buffelgrass pasture conversion on the regeneration, and reproduction of the columnar cactus, Pachycereus pecten-aboriginum in northwestern Mexico
Daniel Morales-Romero, Universidad Estatal de Sonora; Francisco Molina-Freaner, Estación Regional del Noroeste, Instituto de Ecología, Universidad Nacional Autónoma de México

PS 3-39

Water sources and nitrogen relations of grasses and shrubs in phreatophytic communities of the Great Basin Desert
Diane Pataki, University of Utah; Sharon A. Billings, University of Kansas; Elke Naumburg, Glorieta Geoscience, Inc.; Christine M. Goedhart, University of California, Irvine

PS 3-40

Effects of water frequency on individual plant performance: Implications for restoration
Jayanthi Mukherjee, Utah State University; Thomas A. Jones, Utah State University; Peter Adler, Utah State University; Thomas A. Monaco, USDA Agricultural Research Service

PS 3-41

A model of vegetation structure constraining productivity in response to changes in water availability
Lara G. Reichmann, USDA, Agricultural Research Service; Osvaldo E. Sala, Arizona State University; Edward B. Rastetter, Marine Biological Lab

PS 3-42

Production of two exotic grasses and one desert native annual under altered precipitation and nitrogen regimes: Implications for fire in the desert
Leela E. Rao, University of California, Riverside; Edith B. Allen, University of California, Riverside

PS 3-43

Applying the Dahlem Desertification Paradigm (DDP) to assess water use in a coupled human-ecological system: A case study in La Amapola, Mexico
Javier E. Garcia de Alba Verduzco, Instituto Potosino de Investigacion Cientifica y Tecnologica; Tulio Arredondo, Instituto Potosino de Investigación Científica y Tecnológica A. C.; Elisabeth Huber-Sannwald, Instituto Potosino de Investigación Cientifica y Tecnológica; Monica Ribeiro Palacios, Instituto Potosino de Investigacion Cientifica y Tecnologica; Miguel Aguilar Robledo, Universidad Autonoma de San Luis Potosi; James F. Reynolds, Duke University

PS 3-44

Applying the Dahlem Desertification Paradigm (DDP) to assess key supporting ecosystem services in a coupled human-ecological system: A case study in La Amapola, Mexico
Mónica Ribeiro Palacios, Universidad Autónoma de Querétaro; Elisabeth Huber-Sannwald, Instituto Potosino de Investigación Cientifica y Tecnológica; Javier E. Garcia de Alba Verduzco, Instituto Potosino de Investigacion Cientifica y Tecnologica; Humberto Reyes Hernandez, Universidad Autonoma de San Luis Potosi; James F. Reynolds, Duke University

PS 3-45

Effect of experimental drought and water addition on community dynamics in three aridland plant communities
Jennifer Johnson, University of New Mexico; Scott L. Collins, University of New Mexico; Eric E. Small, University of Colorado; William T. Pockman, University of New Mexico

PS 3 - Arid and semi-arid systems