Bats are the only mammals that can fly. There are more than 1,000 species. In fact, 1 in 5 mammals is a bat.
And in the fall, bats often migrate hundreds of miles to abandoned mines and caves where they hibernate through the winter months. Deep in the caverns, they cuddle up in tight, furry clusters, while scientists study them, trying to figure out the hows and whys of a bat plague called White Nose Syndrome and what, if anything, can be done to prevent or stop it.
White Nose Syndrome has killed nearly 7 million bats since it first appeared in the US in New York State. The deadly fungal disease has spread to 19 states as far west as Missouri, as far south as Alabama and north into Canada.
Although White Nose Syndrome has not yet been seen in Michigan, where nine species of bats are heading for their winter homes—mostly in 75 or 80 abandoned mines in the western Upper Peninsula. And there, a team of researchers led by Joseph Bump of Michigan Technological University and Alexis Sullivan, one of his graduate students, is using a novel chemical “fingerprinting” technique called stable hydrogen isotopes to determine where the hibernating bats originated.Sullivan and Bump reported in the July 2012 issue of the journal Ecological Applications on their use of stable hydrogen isotopes to track the travels of the little brown bats that hibernate in three mines in the western UP.
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.“
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.
Michigan Tech's bat research was funded by the National Park Service Great Lakes Network, the Ecosystems Science Center and the School of Forest Resources and Environmental Science at Michigan Tech.Dr. Joseph Bump
Dr. Joseph Bump | Newswise Science News
At last, butterflies get a bigger, better evolutionary tree
16.02.2018 | Florida Museum of Natural History
New treatment strategies for chronic kidney disease from the animal kingdom
16.02.2018 | Veterinärmedizinische Universität Wien
Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale
Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...
For photographers and scientists, lenses are lifesavers. They reflect and refract light, making possible the imaging systems that drive discovery through the microscope and preserve history through cameras.
But today's glass-based lenses are bulky and resist miniaturization. Next-generation technologies, such as ultrathin cameras or tiny microscopes, require...
Scientists from the University of Zurich have succeeded for the first time in tracking individual stem cells and their neuronal progeny over months within the intact adult brain. This study sheds light on how new neurons are produced throughout life.
The generation of new nerve cells was once thought to taper off at the end of embryonic development. However, recent research has shown that the adult brain...
Theoretical physicists propose to use negative interference to control heat flow in quantum devices. Study published in Physical Review Letters
Quantum computer parts are sensitive and need to be cooled to very low temperatures. Their tiny size makes them particularly susceptible to a temperature...
Let’s say the armrest is broken in your vintage car. As things stand, you would need a lot of luck and persistence to find the right spare part. But in the world of Industrie 4.0 and production with batch sizes of one, you can simply scan the armrest and print it out. This is made possible by the first ever 3D scanner capable of working autonomously and in real time. The autonomous scanning system will be on display at the Hannover Messe Preview on February 6 and at the Hannover Messe proper from April 23 to 27, 2018 (Hall 6, Booth A30).
Part of the charm of vintage cars is that they stopped making them long ago, so it is special when you do see one out on the roads. If something breaks or...
15.02.2018 | Event News
13.02.2018 | Event News
12.02.2018 | Event News
16.02.2018 | Information Technology
16.02.2018 | Health and Medicine
16.02.2018 | Physics and Astronomy