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This profile was last updated on 12/9/13  and contains information from public web pages and contributions from the ZoomInfo community.

Dr. Ulrich G. Mueller

Wrong Dr. Ulrich G. Mueller?
University of Texas at Austin
1 University Station B6600
Austin, Texas 78712
United States

Company Description: The University of Texas at Austin, the largest component of The University of Texas System, is a major research university and home to more than 48,000 students,...   more
9 Total References
Web References
Contact: Ulrich ...
www.eurekalert.org, 22 Feb 2011 [cached]
Contact: Ulrich Mueller umueller@mail.utexas.edu 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?"
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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 ...
www.eurekalert.org, 22 Feb 2011 [cached]
Contact: Ulrich Mueller umueller@mail.utexas.edu 512-232-5775 University of Texas at Austin
Symbiotic fungus does not depend on fungus-farming ants for reproduction, researchers say
www.eurekalert.org, 28 June 2006 [cached]
Contact: Ulrich Muellerumueller@mail.utexas.edu512-232-5775University of Texas at Austin
...
Graduate student Alexander Mikheyev and Dr. Ulrich Mueller, professor of integrative biology, have now found that the fungi reproduce sexually and disperse widely without the aid of their ant farmers.
...
"The fungi are not completely domesticated and under the strict control of the ants," said Mueller."Instead, the fungi occasionally have a life of their own, dispersing independently of the ants and exchanging genes with other ant-cultivated fungi."
Mikheyev, Mueller and Abbot also compared leaf-cutter ants and their fungal crops from Cuba to populations of ants and fungi from Central and South America.
Labslink Research News
www.labslink.com, 6 Aug 2010 [cached]
"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. The ant's symbiotic relationship with the cold tolerant fungus clearly permits it to survive in the more temperate environments of Texas. 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. "But we have found that this can be the opposite. In the tropics, the symbiosis between the leafcutter ants and their fungal crops helped to broaden the ants' ecological niches. In the Texas leafcutter, the symbiotic relationship also constrains them. Texas is a particularly interesting laboratory for studies of local species adaptations because of its unique ecological conditions. It is the only state in the U.S. where an unusually steep precipitation gradient from east to west crosses a steep temperature gradient from north to south, ranging from temperate to subtropical. "Texans are uniquely positioned to monitor the effect of environmental change on U.S. biodiversity," says Mueller.
MyNature.ca - Nature News
www.mynature.ca, 16 April 2006 [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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