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Dr. Ulrich G. Mueller

Professor of Integrative Biology

Texas Memorial Museum of Science and History

Direct Phone: (512) ***-****       

Email: u***@***.edu

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Texas Memorial Museum of Science and History

2400 Trinity Street

Austin, Texas 78705

United States

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Background Information

Employment History

Glocap Advisors LLC

Visiting Scientist

Rocky Mountain Biological Laboratory




New Mexico State University


Cell and Molecular Biology

Baylor College of Medicine


Web References (24 Total References)

Contact: Ulrich ... [cached]

Contact: Ulrich Mueller 512-232-5775 University of Texas at Austin

"The same is true for human farmers," says Ulrich Mueller, professor of biology. "Some of our crops come originally from the tropics, and humans have had to select them over time to grow in colder climates. But we are still limited by our abilities to select and adapt crops to local conditions."
Mueller and his colleagues found that even within Texas the fungus is more tolerant of cold at its northern edge near Dallas, and less tolerant of cold at its southern edge near Brownsville.
At Fort Belknap, just northwest of Dallas, Mueller says the ants "are just hanging on."
Leafcutter ants are largely tropical, and the Texas leafcutter ant, Atta texana, is one of only three leafcutter ant species found in the United States. The species arrived in the region about 10,000 years ago after the retreat of the glaciers and the end of the last Ice Age.
"The ants may have only been in Fort Belknap for a few hundreds or thousands of years," Mueller says.
IMAGE: Dr. Ulrich Mueller, professor of integrative biology at the University of Texas at Austin, inspects a Texas leafcutter mound at the Brackenridge Field Lab in Austin, Texas. Click here for more information.
The finding provides a perspective on symbiotic relationships, which are normally thought of as being beneficial to both organisms.
"We normally think that forging a symbiotic relationship enriches lives-that each organism is helping the other," says Mueller.
"Texans are uniquely positioned to monitor the effect of environmental change on U.S. biodiversity," says Mueller. "It will be interesting to see what happens with these ants over the next 10 to 20 years with global warming. Will they expand to Oklahoma and across the Mississippi River, or will cold snaps like those we just experienced knock them back?"
Mueller's research was supported by the National Science Foundation, the W.M. Wheeler Endowment and numerous Texas landowners who allowed ant collection on their properties.

Contact: Ulrich ... [cached]

Contact: Ulrich Mueller 512-232-5775 University of Texas at Austin

Prof. Ulrich Mueller, ... [cached]

Prof. Ulrich Mueller, University of Texas (Austin)

Healthcare & Life Services [cached]

Ulrich Mueller, PhD

Animals Wildlife - Animal Facts, Animal Pictures, Habitat Facts, Evolution and Zoology [cached]

A team of scientists from the University of Texas at Austin led by Dr. Ulrich Mueller, Professor of Integrative Biology, have now discovered that despite the benefits, there are indeed limitations imposed by the ant-fungus symbiosis.

Dr. Ulrich Mueller observes that "it will be interesting to see what happens with these ants over the next 10 to 20 years with global warming.

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