Sh june 2012

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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.

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“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

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A New Sonoran Herpetologist Editor Needed

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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

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