St. George • When bats come to mind, people generally think of horror movies and vampires, but bats actually play an important role in the ecosystem. And they’re in danger.
White Nose Syndrome, WNS, was discovered in New York in 2006 and has been affecting the U.S. and Canadian bat populations ever since, The Spectrum newspaper reported. It’s a white fungus that attacks the skin of the bats while they hibernate and wakes them. The bats attempt to clean off the fungus, and it gets on their ears and noses — hence the name White Nose Syndrome.
Since WNS attacks bats during hibernation, the bats spend precious energy awake and using up their food stores, essentially starving them to death. There is no known cure, and it has a 90-100% fatality rate. WNS has made its way across the U.S. and only a few states are currently WNS free: Utah, Nevada, Idaho, Colorado, Arizona, Florida, and Louisiana.
WNS spreads through pores that travel on human’s shoe wear and gear they might bring into caves. It also spreads through bat-to-bat contact, spreading rapidly since fungus thrives in cold, dark places like caves.
“WNS is not that big of a deal in places that have already been affected and it seems to hit certain species of bats harder than others,” said Kimberly Dickerson, WNS regional coordinator for Mountain-Prairie Regions.
Climate plays a large role in the spread of WNS and places like Florida have no reported cases because they don’t have caves where bats hibernate. Utah doesn’t have an especially large number of caves and in Southern Utah, it tends to stay warm year-round. Enough so that bats can be seen flying around for most of the year and have a shorter hibernation period.
“There are probably around a dozen bat species in Washington County,” Keith Day, a wildlife biologist, said.
Eighteen bat species reside in Utah and the Division of Natural Resources surveys the local bats in rotation every three years. Day has been doing bat surveys in Utah since before 2009 when the rotation started. He said he brings out interns from the DNR to camp and catch bats in soft netting so that they can take measurements and monitor the bat populations.
Day and his team look for WNS and there is a large concern that it will spread to Utah, so monitoring the bats in different areas is vital.
“Most bats are inactive in the cold weather or wintertime, or mostly inactive. There is bat activity year-round down here in Washington County. It’s warm enough that they can be active year-round mostly spring, summer, and fall,” Day said.
Places with water attract large numbers of insects and with Utah being a dry climate, it’s also a prime area for bats to visit during dusk. Day said that all the bats in Utah are insectivorous.
There are caves and mines where bats like to hibernate but here in Southern Utah, you can find bats in places like the Red Hills Desert Reserve, Ivins near the canyons, and Quail Creek.
“The caving community is working hard to make sure gear is cleaned off and the WNS spores aren’t moving. But you can’t disinfect all the equipment,” Dickerson said.
Though bats spread WNS by being near each other during hibernation and flying to different locations, humans play a large role in the spread of WNS. Especially in places like national parks and caves where tourists often go.
As resilient as these fungi spores are, they can stay on caving equipment, clothes and shoe wear through plane rides and transfer to a new location. It’s essential that when caving or going to an area with known bats to clean off equipment and clothing as soon as possible to eliminate the spread of WNS.
One concerned citizen even took his idea to implement cave management on the Arizona strip to the local government but has been turned down.
“I don’t think that the organizations [here in Utah] have been active enough,” said Richard Spotts, a retired environmental lawyer and St. George local.
Spotts said he wants to see the states that have not have suspected or confirmed cases be more proactive in the prevention of WNS.
Though bats tend to be associated with horror movies or vampires, their role in pollination and keeping mosquito populations to a bearable amount is what really counts. Without bats, Utah farmers would have more pests eating their crops and they would lose a pollinator.
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June 14, 2021 at 12:03AM
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Biologists try to protect Utah bats from deadly fungus - Salt Lake Tribune
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