Volume 25
January 2012 June 2012
Number 16
this month’s speaker
Katie Gray University of Arizona, School of Natural Resources and the Environment
Effects of Buffelgrass on Sonoran Desert Tortoises 7:15 PM Tuesday, 19 June University of Arizona, BIO5/Keating Building 1657 East Helen Street
Katie Gray received her B.S. in Zoology at Auburn University and became interested
in the Sonoran Desert on a class field trip to southern Arizona and New Mexico. Shortly after graduating, she was accepted into the University of Arizona’s School of Natural Resources and the Environment program to pursue a Master’s degree in Wildlife Conservation, which focused on the impacts of
short article buffelgrass (Pennisetum ciliare) on Sonoran Desert Tortoises (Gopherus agassizii). Buffelgrass is a nonnative grass that has increased markedly in distribution throughout the southwestern United States and Mexico. By altering ecosystem structure and function, buffelgrass has the potential to alter the quantity and quality of habitat for animals such as Desert Tortoises, which inhabit areas being invaded by buffelgrass. In 2010 and 2011, Katie examined effects of buffelgrass on density, condition, and habitat use of Sonoran Desert Tortoises, as well as on vegetation composition in tortoise habitat. She and her collegues found that the proportion of buffelgrass on their 50 4-ha study plots did not alter density or patterns of habitat use by tortoises. Condition of adult tortoises, however, averaged 10% lower in areas where cover of buffelgrass was high, perhaps in response to reduction in forage quality in areas where buffelgrass has become dominant. Results of their study will help biologists understand the threat that buffelgrass poses to this rare vertebrate in the southwestern United States.
51
“Conservation and Awareness of Amphibians in Third World Countries” by Suman Pratihar
Madrean Archipelago Conference Abstracts 52
Herpetology in the Madrean Archipelago Conferences
announcements 59
Tenth Jarchow Conservation Award: Request for nominations
59
A New Sonoran Herpetologist Editor Needed
60
State of the Union: Legal Authority Over the Use of Native Amphibians and Reptiles in the United States
next month’s Speaker
Christian D. Wright Examining the broad applicability of StateDependent Foraging using a low energy system, the Gila monster (Heloderma suspectum) Tuesday, 17 July
Retrieving a Sonoran Desert Tortoise (Gopherus agassizii) from a rock crevice at Saguaro National Park, Rincon Mountain District, Tucson, AZ. Photo by Chris Magionami.
Tucson Herpetological Society meetings are open to the public and are held on the third Tuesday of each month starting at 7:15 PM
SONORAN HERPETOLOGIST 25 (6) 2012
50