Research Insights in

Semiarid Ecosystems

RISE

Recent research at the USDA-ARS Walnut Gulch Experimental Watershed
(WGEW) and the University of Arizona Santa Rita Experimental Range
(SRER)

![](media/image1.jpeg){width="6.124305555555556in"
height="2.5520833333333335in"}

RISE Program

 

**University of Arizona, Tucson, Marley Building, Rm. 230**

**Saturday, 13 November 2004, 9AM to 4:30PM**

**Post-symposium BBQ, UA Mall, 4:30-6:30 PM**

** **

Purpose:  The objectives of the symposium are to share recent results of
scientific research at WGEW and SRER, to encourage future research
activities at the WGEW and the SRER, and to promote the WGEW and the
SRER as outdoor scientific laboratories.

+--------+--------------+---------------------------------------------+
| **Re   |              |                                             |
| search |              |                                             |
| In     |              |                                             |
| sights |              |                                             |
| in     |              |                                             |
| Se     |              |                                             |
| miarid |              |                                             |
| Ecos   |              |                                             |
| ystems |              |                                             |
| (RISE) |              |                                             |
| Sympo  |              |                                             |
| sium** |              |                                             |
|        |              |                                             |
| **13   |              |                                             |
| No     |              |                                             |
| vember |              |                                             |
| 2004** |              |                                             |
+--------+--------------+---------------------------------------------+
|        |              |                                             |
+--------+--------------+---------------------------------------------+
| ## M   |              |                                             |
| arley  |              |                                             |
| Buildi |              |                                             |
| ng, Ro |              |                                             |
| om 230 |              |                                             |
+--------+--------------+---------------------------------------------+
|        |              |                                             |
+--------+--------------+---------------------------------------------+
| 8:3    | #            |                                             |
| 0-9:00 | Registration |                                             |
+--------+--------------+---------------------------------------------+
| 9:0    | # Mit        | RISE Welcome                                |
| 0-9:10 | ch McClaran  |                                             |
|        |              |                                             |
|        | #            |                                             |
|        |  Susan Moran |                                             |
+--------+--------------+---------------------------------------------+
| 9:1    | # S          | Woody plant proliferation in grasslands:    |
| 0-9:30 | teve Archer  | new perspectives on an old problem          |
|        |              |                                             |
|        | #            |                                             |
|        | ##### UA SNR |                                             |
+--------+--------------+---------------------------------------------+
| 9:3    | **Judith     | Linking plant and insect physiology in the  |
| 0-9:50 | Bronstein**  | Datura wrightii-Manduca sexta interaction   |
|        |              |                                             |
|        | **UA EEB**   |                                             |
+--------+--------------+---------------------------------------------+
| 9:50   | **Dave       | Selected Research from the WGEW and looking |
| -10:10 | Goodrich**   | to the Future                               |
|        |              |                                             |
|        | **USDA ARS   |                                             |
|        | SWRC**       |                                             |
+--------+--------------+---------------------------------------------+
| 10:10  | # Poster i   | *Poster teasers provided by poster authors* |
| -10:30 | ntroductions |                                             |
+--------+--------------+---------------------------------------------+
| 10:30  | # Post       | ####### Authors will be with their post     |
| -11:10 | er Session I | ers in the hall outside the conference room |
|        |              |                                             |
|        | **(See List  |                                             |
|        | Below)**     |                                             |
+--------+--------------+---------------------------------------------+
| P1     | #            | Measuring surface roughness to parameterize |
|        |  Ross Bryant | radar backscatter models for retrieval of   |
|        |              | surface soil moisture                       |
|        | **USDA ARS   |                                             |
|        | SWRC**       |                                             |
+--------+--------------+---------------------------------------------+
| P2     | # D          | Land use history and soils: Impacts on      |
|        | awn Browning | woody cover assessments                     |
|        |              |                                             |
|        | #            |                                             |
|        | ##### UA SNR |                                             |
+--------+--------------+---------------------------------------------+
| P3     | ##           | Respiration in a semi-arid grassland in     |
|        | Jessie Cable | Southeastern Arizona: the role of           |
|        |              | precipitation pulses                        |
|        | **UA EEB**   |                                             |
+--------+--------------+---------------------------------------------+
| P4     | # Bob Strain | Upper San Pedro Partnership                 |
|        |              |                                             |
|        | **City of    |                                             |
|        | Sierra       |                                             |
|        | Vista**      |                                             |
+--------+--------------+---------------------------------------------+
| P5     | ##           | Prickly Pear (Opuntia Engelmannii) Carbon   |
|        |  Adrian Vogl | Pools in a Desert Grassland                 |
|        |              |                                             |
|        | **UA SNR**   |                                             |
+--------+--------------+---------------------------------------------+
| P6     | # Theresa    | Effects of removing Lehmann lovegrass       |
|        | Mau-Crimmins | (Eragrostis lehmanniana) from grasslands in |
|        |              | southeastern Arizona                        |
|        | **UA SNR**   |                                             |
+--------+--------------+---------------------------------------------+
| P7     | #            | Soil carbon following woody encroachment:   |
|        | ##### C. Win | variation within soils of different         |
|        | ston Wheeler | textures and along a climatic gradient at   |
|        |              | the SRER                                    |
|        | **Stanford   |                                             |
|        | University** |                                             |
+--------+--------------+---------------------------------------------+
| P8     | ####         | Drought and Water Content Analysis of       |
|        | ## Hojin Kim | Semiarid Vegetation Communities with        |
|        |              | Remotely Sensed Data and Eddy-flux Tower    |
|        | # UA SWES    | Measurement                                 |
+--------+--------------+---------------------------------------------+
| 11:10  | #            | Impacts of grazing and shrub management on  |
| -11:30 | Dean Martens | hydrologic attributes in semi-arid          |
|        |              | rangelands                                  |
|        | **USDA ARS   |                                             |
|        | SWRC**       |                                             |
+--------+--------------+---------------------------------------------+
| 11:30  | # A          | Seasonal and interannual patterns of carbon |
| -11:50 | lfredo Huete | and moisture variability with combined      |
|        |              | AVIRIS and MODIS satellite observations     |
|        | **UA SWES**  |                                             |
+--------+--------------+---------------------------------------------+
| 11:5   | # Lunch      | A food court is nearby in the UA Memorial   |
| 0-1:00 |  on your own | Union                                       |
+--------+--------------+---------------------------------------------+
| 1:0    | # T          | Controls over carbon and water fluxes by    |
| 0-1:20 | ravis Huxman | vegetation, soils and climate               |
|        |              |                                             |
|        | **UA EEB**   |                                             |
+--------+--------------+---------------------------------------------+
| 1:2    | #            | Proposed adaptive management experiments on |
| 0-1:40 | Leonard Lane | small semiarid watersheds                   |
|        |              |                                             |
|        | **USDA ARS   |                                             |
|        | (ret)**      |                                             |
+--------+--------------+---------------------------------------------+
| 1:4    | # Russ Scott | The differential response of transpiration  |
| 0-2:00 |              | and bare-soil evaporation to precipitation  |
|        | **USDA ARS   | and their relation to carbon dioxide fluxes |
|        | SWRC**       | in a Chihuahuan Desert shrubland            |
+--------+--------------+---------------------------------------------+
| 2:0    | # Poster i   | ######                                      |
| 0-2:20 | ntroductions | # Poster teasers provided by poster authors |
+--------+--------------+---------------------------------------------+
| 2:3    | # Poste      | ####### Authors will be with their post     |
| 0-3:10 | r Session II | ers in the hall outside the conference room |
|        |              |                                             |
|        | **(See List  |                                             |
|        | Below)**     |                                             |
+--------+--------------+---------------------------------------------+
| P1     | #            | Comparison of two methods for extracting    |
|        |  David Thoma | surface soil moisture from C-band radar     |
|        |              | imagery                                     |
|        | ###### U     |                                             |
|        | SDA ARS SWRC |                                             |
+--------+--------------+---------------------------------------------+
| P2     | ## He        | Spatial patterns of soil organic carbon     |
|        | ather Throop | relative to tree size and canopy            |
|        |              | distribution at the Santa Rita Experimental |
|        | #            | Range                                       |
|        | ##### UA SNR |                                             |
+--------+--------------+---------------------------------------------+
| P3     | ## Enr       | Short-term dynamics of soil evaporation and |
|        | ico A. Yepez | transpiration following a moisture pulse in |
|        |              | semiarid grassland: a chamber-based method  |
|        | **UA SNR**   | using stable isotope tracers                |
|        |              |                                             |
|        | #            |                                             |
+--------+--------------+---------------------------------------------+
| P4     | #            | Southwest Watershed Research Center Data    |
|        | # Eric Anson | Availability Project (DAP)                  |
|        |              |                                             |
|        | **USDA ARS   |                                             |
|        | SWRC**       |                                             |
+--------+--------------+---------------------------------------------+
| P5     | # Pi         | Supplementary information, not photoperiod, |
|        | erre Deviche | regulates Plasma luteinizing hormone in     |
|        |              | male Rufous-winged Sparrows, Aimophila      |
|        | **ASU SLS**  | carpalis                                    |
+--------+--------------+---------------------------------------------+
| P6     | ## J         | Differentiating the phenology of Prosopis   |
|        | orry Kaurivi | velutina from grassland with MODIS          |
|        |              |                                             |
|        | # UA SWES    |                                             |
+--------+--------------+---------------------------------------------+
| P7     | # C          | Estimating large scale daytime net carbon   |
|        | handra Holif | dioxide flux using instantaneous remote     |
|        | ield Collins | sensing measurements                        |
|        |              |                                             |
|        | **USDA ARS   |                                             |
|        | SWRC**       |                                             |
+--------+--------------+---------------------------------------------+
| P8     | #            |                                             |
+--------+--------------+---------------------------------------------+
| 3:1    | #            | Sediment tracer studies at Walnut Gulch     |
| 0-3:30 | Mark Nearing | Experimental Watershed                      |
|        |              |                                             |
|        | **USDA ARS   |                                             |
|        | SWRC**       |                                             |
+--------+--------------+---------------------------------------------+
| 3:3    | #            | Sediment transport in low-order channels on |
| 0-3:50 | Mary Nichols | the Walnut Gulch Experimental Watershed     |
|        |              |                                             |
|        | **USDA ARS   |                                             |
|        | SWRC**       |                                             |
+--------+--------------+---------------------------------------------+
| 3:5    | #            | Synthesis and implications of 90 years of   |
| 0-4:10 | Kris Havstad | science at the Jornada                      |
|        |              |                                             |
|        | **USDA ARS   |                                             |
|        | JER**        |                                             |
+--------+--------------+---------------------------------------------+
| 4:1    | # Discussion | All speakers and poster authors will be in  |
| 0-4:30 |              | attendance                                  |
+--------+--------------+---------------------------------------------+
|        |              |                                             |
+--------+--------------+---------------------------------------------+
| ###    |              |                                             |
| # Bar- |              |                                             |
| B-Que  |              |                                             |
| on the |              |                                             |
|  UA Ma |              |                                             |
| ll 4:3 |              |                                             |
| 0-6:30 |              |                                             |
+--------+--------------+---------------------------------------------+

**RISE Organizing Committee:**

Mark Heitlinger, Mary Nichols, Mitch McClaran, Susan Moran

<markh@Ag.arizona.edu>

<mnichols@tucson.ars.ag.gov>

<mcclaran@u.arizona.edu>

<smoran@tucson.ars.ag.gov>

# Acronyms:

ARS: Agricultural Research Service

ASU: Arizona State University

EEB: Ecology and Evolutionary Biology

JER: Jornada Experimental Range

SLS: School of Life Sciences

SNR: School of Natural Resources

SWES: Soil, Water and Environmental Science

SWRC: Southwest Watershed Research Center

UA: University of Arizona

# Notes: