Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Chemical Fingerprinting Tracks Travels of Little Brown Bats

31.05.2012
They’re tiny creatures with glossy, chocolate-brown hair, out-sized ears and wings. They gobble mosquitoes and other insect pests during the summer and hibernate in caves and mines when the weather turns cold. They are little brown bats, and a deadly disease called white-nose syndrome is threatening their very existence.

A novel technique using stable hydrogen isotopes—a kind of chemical fingerprint found in tissues such as hair—has enabled researchers at Michigan Technological University to determine where hibernating bats originated. Knowing that could help predict and ultimately manage the spread of white-nose syndrome.

In the July issue of the journal Ecological Applications, Joseph Bump, an assistant professor at Michigan Tech’s School of Forest Resources and Environmental Science, and a former undergraduate student in his lab, Alexis Sullivan, report on their use of stable hydrogen isotopes to identify the likely origins of the little brown bats that hibernate in three mines of Michigan’s western Upper Peninsula.

Sullivan, who is first author on the paper, is now working on dual Master of Science degrees in Forest Molecular Genetics and Biotechnology at Michigan Tech and the Swedish University of Agricultural Science. She will receive degrees from both universities as part of the ATLANTIS Program, a transatlantic educational project jointly funded by the US Department of Education and the European Union.

Sullivan, Bump and colleagues Rolf Peterson and Laura Kruger studied the little brown bats that winter in the Quincy Mine in Hancock, Mich., the Caledonia Mine near Ontonagon, Mich., and the Norway Mine in Norway, Mich. They collected bat hair and tested it to identify the hydrogen fingerprint of the water where the bat grew the hair. Ecologists have developed maps of the distinctive hydrogen fingerprints of water from different locations, so the chemical fingerprints from the bat hair can be matched to the flying mammals’ probable origins.

Up to now, stable hydrogen isotopes have been used mostly to track migratory birds.

“Relatively little is known about bat-to-bat interactions or how far bats travel between seasonal habitats,” Sullivan explains. Earlier attempts to use hydrogen isotopes with bats stalled because most hibernating bats don’t make dramatic seasonal migrations, and they have unclear molt patterns, making it difficult to connect their hair to a given habitat, she adds.

In their latest study, Sullivan, Bump and colleagues were able to estimate with 95 percent certainty the summer origins of the tens of thousands of bats that hibernate in the Quincy Mine, the 23,000 bats in the Norway Mine and the estimated quarter of a million bats that call the Caledonia Mine their winter home. Using the hydrogen “fingerprints” from hair samples, they located the geographic areas from which the bats migrate—some as far as 565 kilometers (351 miles) from their hibernation mine.

“This novel application of stable hydrogen isotopes can help predict which hibernation sites are likely to exchange bats,” says Bump. Bat-to-bat contact is believed to be the way white-nose syndrome is spread, so understanding the bats’ movements can help us know which hibernation sites are connected and how disease could potentially be transmitted among locations.“

Although white-nose syndrome has not been seen among bats in the Upper Peninsula of Michigan yet, it is decimating bat populations in the northeastern US.

And why should anyone care what happens to these reclusive winged creatures that weigh less than half an ounce and average 3.4 inches long?

“First, they are amazing mammals. Second, we should care about little brown bats because they eat millions of things for which we care much less, like mosquitos,” says Bump.

This research was funded by the National Park Service Great Lakes Network and the Ecosystems Science Center and the School of Forest Resources and Environmental Science at Michigan Tech.

A preprint of the paper is available at http://www.esajournals.org/doi/abs/10.1890/11-1438.1

Michigan Technological University (mtu.edu) is a leading public research university developing new technologies and preparing students to create the future for a prosperous and sustainable world. Michigan Tech offers more than 130 undergraduate and graduate degree programs in engineering; forest resources; computing; technology; business; economics; natural, physical and environmental sciences; arts; humanities; and social sciences.

Joseph K. Bump | Newswise Science News
Further information:
http://www.mtu.edu

More articles from Life Sciences:

nachricht Single-stranded DNA and RNA origami go live
15.12.2017 | Wyss Institute for Biologically Inspired Engineering at Harvard

nachricht New antbird species discovered in Peru by LSU ornithologists
15.12.2017 | Louisiana State University

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: First-of-its-kind chemical oscillator offers new level of molecular control

DNA molecules that follow specific instructions could offer more precise molecular control of synthetic chemical systems, a discovery that opens the door for engineers to create molecular machines with new and complex behaviors.

Researchers have created chemical amplifiers and a chemical oscillator using a systematic method that has the potential to embed sophisticated circuit...

Im Focus: Long-lived storage of a photonic qubit for worldwide teleportation

MPQ scientists achieve long storage times for photonic quantum bits which break the lower bound for direct teleportation in a global quantum network.

Concerning the development of quantum memories for the realization of global quantum networks, scientists of the Quantum Dynamics Division led by Professor...

Im Focus: Electromagnetic water cloak eliminates drag and wake

Detailed calculations show water cloaks are feasible with today's technology

Researchers have developed a water cloaking concept based on electromagnetic forces that could eliminate an object's wake, greatly reducing its drag while...

Im Focus: Scientists channel graphene to understand filtration and ion transport into cells

Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms--ions--but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play a critical role in biological functions such as muscle contraction and the firing of brain cells.

To rapidly transport the right ions through the cell membrane, the tiny channels rely on a complex interplay between the ions and surrounding molecules,...

Im Focus: Towards data storage at the single molecule level

The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.

Over the past few years, the building blocks of storage media have gotten ever smaller. But further miniaturization of the current technology is hindered by...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

See, understand and experience the work of the future

11.12.2017 | Event News

Innovative strategies to tackle parasitic worms

08.12.2017 | Event News

AKL’18: The opportunities and challenges of digitalization in the laser industry

07.12.2017 | Event News

 
Latest News

Engineers program tiny robots to move, think like insects

15.12.2017 | Power and Electrical Engineering

One in 5 materials chemistry papers may be wrong, study suggests

15.12.2017 | Materials Sciences

New antbird species discovered in Peru by LSU ornithologists

15.12.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>