New Details on Bat-Killing Fungus

  • In caves where 200 to 300 thousand bats used to hibernate, scientists like Scott Darling have found that this year there are only hundreds. (Photo courtesy of the US Fish and Wildlife Service)

Scientists are racing to find a way to fight-off a fungus that’s killing bats. More than a million bats have died so far. Scientists believe entire hibernating bat species could be wiped out within two decades. Laura Iiyama reports the cause might have come from overseas:

Transcript

Scientists are racing to find a way to fight-off a fungus that’s killing bats. More than a million bats have died so far. Scientists believe entire hibernating bat species could be wiped out within two decades. Laura Iiyama reports the cause might have come from overseas:

Biologist Scott Darling knew something was wrong in a recent winter when he got several calls at his Fish and Wildlife office in Vermont. People told him about hundreds of bats flying in the air and dying in the snow. During winter, the furry mammals should be hibernating.

He went to Aeolus cave. It’s where the bats in the area should be crowded together on the walls and ceiling.

“Aeolus cave became a morgue. Bats freezing to death in clusters just outside the cave entrance. Most of the bats flew out of the cave onto the landscape to certain death.”

Where 200 to 300 thousand bats had hibernated just four years ago, this year there are just a couple hundred.

The dead bats had white nose syndrome.

The white powdery fungus was first noticed on bats in New York State in 2006. It’s spread into Ontario, Canada and as far south as Tennessee.

The fungus is not directly killing the bats.

Thomas Kunz is a professor at Boston University. He suspects the fungus keeps waking-up the hibernating bats.

“It may be simply the irritation from the fungus that is causing, if you have athlete’s feet, it itches.”

Instead of hibernating, surviving on their fat reserves, the bats keep waking-up. They burn off the fat. They get too thin. And they die.

Word spread about the fungus.

Thomas Kunz says some scientists recalled seeing a white fungus on bats elsewhere:

“Bat biologists in Europe have observed and reported that there are bats that do have the fungus although it doesn’t seem to be killing them.”

Scientists think someone visited a cave in Europe. Spores from the fungus got on clothing or shoes. Then that person wore the same shoes or clothing in a cave in the U.S. The spores were picked-up by the bats.

The bats huddle together in hibernation, easily spreading the fungus.

Often 90 percent of the bats are killed-off after the first appearance of the fungus. And Kunz says that may have been what happened to bats in Europe because we don’t find as many bats in European caves as there have been in North American caves:

“Now it’s very possible that in historic times there were large numbers of hibernating bats in Europe and these are the leftovers, these were the survivors that may be resistant to the fungus.”

So the arrival of the fungus may mean US bat species will permanently drop in numbers, like the bats in Europe.

David Blehert (blee-hurt) of the US Geological Survey says if that’s the case, it will be a dramatic change in life in caves in America and Canada.

“Whereas we have hibernation caves with 100 thousand, 300 thousand and even commonly lower ten thousand but those are rather common sites where we’ve seen the fungus decimate up to 95 percent and greater to the animals in the cave. Many of the European hibernation sites have between one and thirty animals.”

There’s no treatment for white nose syndrome. And even if a cure is found, it will be a very long time –centuries– before the bats recover. Bats reproduce slowly. The females have only one pup, one baby bat, per year. And there are over a million bats dead so far.

For The Environment Report, I’m Laura Iiyama.

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Fastest Blast in Nature

A botanist has documented what he’s
calling the “fastest flight in nature.” Tana
Weingartner explains:

Transcript

A botanist has documented what he’s
calling the “fastest flight in nature.” Tana
Weingartner explains:

Imagine this: a You-Tube video showing tulip-shaped fungi recoiling and
launching spores like wet cannonballs.

(sound of music)

Nicholas Money is a botanist at Miami University. He and a team of
researchers have used high speed cameras to capture, for the first time, fungi
launching spores.

“Fleas accelerate at 200 g, but we’re clocking these fungi moving at close to 200,000
g in terms of their acceleration. These are astonishingly fast movements.”

Fungi cause billions of dollars in crop damage each year.

Money says knowing how these spores move around can help prevent these
losses. He also says it’ll help allergen and pharmaceutical researchers too.

For The Environment Report, I’m Tana Weingartner.

Related Links

Cure for Frog Killing Fungus?

  • A solution may have been discovered to save frogs from the chytrid fungus (Photo courtesy of the US Fish and Wildlife Service)

Frogs are in trouble. A nasty disease caused by a fungus is wiping out frogs around the world. But researchers might have found a solution. Rebecca Williams has more:

Transcript

Frogs are in trouble. A nasty disease caused by a fungus is wiping out frogs around the world. But researchers might have found a solution. Rebecca Williams has more:

A disease caused by something called chytrid fungus is sweeping through frogs. When the disease moves through a frog population it can wipe out 80% of the entire population. Scientists have been rushing to find something that might help.

Reid Harris is a biologist at James Madison University. He says he’s discovered there are friendly bacteria that live on some types of frogs. And they can kill the fungus.

“It does seem like the pathogen moves in this predictable wave, so you might be able to get out in front of that wave sort of like a fire line.”

Harris says it might be possible to give wild frogs extra doses of the bacteria to fight off the fungus. But first they have to make sure there won’t be side effects.

For The Environment Report I’m Rebecca Williams.

Related Links

Farmers Work to Conserve Water

Some experts say water will be the “oil” of the next generation. As it become
more scarce, prices are going to go up. For farmers, that’s serious business.
Kyle Norris recently spent time with several farmers who say they think
about water constantly:

Transcript

Some experts say water will be the “oil” of the next generation. As it become
more scarce, prices are going to go up. For farmers, that’s serious business.
Kyle Norris recently spent time with several farmers who say they think
about water constantly:


Anne Elder and Paul Bantle are farmers, and they’re pretty hard-core about
water. They keep a hollowed-out rock — it’s like a natural bowl — next to
the barn, and every morning they fill it with fresh water for the farm’s
smaller animals:


“And this amazing thing the cat comes and drinks, the chipmunks come and
drink, the birds come and drink and the bees all drink from the same stone.”


These folks consider water to be a valuable resource. They use it to grow a
variety of fruits and vegetables on their eleven and a half acres. The farm is
a biodynamic farm. Which means it’s organic, but it kind of goes a few steps
further. Anne Elder says biodynamic farming emphasizes healthy soil, and
how to make soil benefit the most from water:


“Healthy soil means it’s alive, it’s active, it’s not compressed but fluffy. It
will have a lot organic matter which will make it more sponge-like rather
than compacted hard tight soil. So when it does rain or when moisture does come,
fluffy soil can take that in and it can just drain through and the roots can
absorb it.”


They till an organic compost into the soil. It’s made of manure, vegetable
matter, hay, and straw. And as biodynamic farmers, they spread herbal teas
on their fields. They do this to feed the plants, and to fight-off problems like
fungus. Their farm is in southeastern Michigan and they get plenty of rain
storms. Paul Bantle says they try to take as much advantage from the rain as
possible:


“Rainwater is way better than any kind of water you’re going to pull from
earth. Irrigation water is cold when it comes from 65 feet down, it’s cold.
Whereas rainwater is warm, in the summer, obviously. And in the late spring
and early fall.”


The thing about cold water is that it shocks plants that have been sitting in
the warm sun all day. And that’s no good. When they need to water the
fields, they pump water from a 65-foot well.


Bantle says he thinks long and hard before using this water for irrigation. He
doesn’t want to dig down further to tap deeper aquifers, even if that means
that the crops will go through a hard time:


“It’s an issue. I mean it’s a huge problem. So definitely I try to be very
conservative about pulling water for irrigation.”


Basically, there are two main irrigation techniques typically used in farming. The first is
drip or trickle irrigation, and this is what Bantle and Elder use. It’s a slow,
easy method that takes time for the water to soak deep into the soil. It’s kind
of like a light, slow rain.


The other technique is overhead irrigation. Picture your garden hose on
spray, with overhead irrigation the water sprays all over. The downside is
that it wastes water because it evaporates and runs-off from the fields.


Lyndon Kelley is an irrigation educator with Michigan State University and
Perdue Extensions. He says drip irrigation is like a mini-van and overhead
irrigation is like a school bus:


“It’s sort of like are you going to take three or four kids to the baseball game
after school each day, well then you’re going to take the mini-van. But if
you’re going to take fifty kids to the baseball game after school every day
then you’re going to want a school bus.”


So, drip is typically used on smaller operations and overhead is usually
used on the larger ones. But Kelley says drip irrigation can be used on larger
farms. It depends on how the roots of the plant take-in water. Grape
vineyards, tomato plants, and some other vegetables respond well to drip
irrigation.


The farm that Anne Elder and Paul Bantle run is a relatively small operation.
They pay a lot of attention to their crops and they water them accordingly,
and all that effort takes a thought and labor:


“It’s almost like a holding-back mentality. How can I let these plants do
what they need to do, until which time the rains will come.”


Farmers are going to have to reevaluate the ways in which they use
water. Some scientists believe climate change will make some places much
drier, and a growing population is already putting heavier demands on the
existing water sources.


For the Environment Report, I’m Kyle Norris.

Related Links

Wasp Kills Pines

  • The Sirex woodwasp is killing pinetrees in New York, Pennsylvania and parts of Ontario and seems to be spreading. (Photo by Lester Graham)

Foresters are worried about a wasp that’s killing pine trees. The insect is
spreading through pine forests in northern states. Steve Carmody reports:

Transcript

Foresters are worried about a wasp that’s killing pine trees. The insect is
spreading through pine forests in northern states. Steve Carmody reports:


The female Sirex woodwasp injects a combination of a toxic mucus and a
fungus while laying her eggs in pine trees. The mixture feeds the eggs, but
kills tree cells, often further weakening stressed pines.


In the three years since it first appeared in upstate New York, the Sirex
woodwasp has spread to 25 New York counties, and two counties in
Pennsylvania and part of Ontario.


Bob Heyd, with the Michigan Department of Natural Resources, says the Sirex
woodwasp is spreading:


“The wasp is actually very strong fliers. They can fly 70 or 100 miles, so what it
is here… it will disperse very quickly.”


In other countries, forestry officials have found an imported predatory
nematode from the wasp’s home range in Europe has been an effective
biological control. It’s unclear if officials in the US will try the same
tactic.


For the Environment Report, I’m Steve Carmody.

Related Links

Building an Ark for the World’s Plants

  • Prairie plants are being lost to development.(Courtesy of Fermi National Accelerator Laboratory)

You’ve heard about the ark Noah built to save the world’s animals. Now comes news of another kind of ark – one designed to help save the world’s plants. The Great Lakes Radio Consortium’s Sandy Hausman has that story:

Transcript

You’ve heard about the ark Noah built to save the world’s animals. Now
comes news of another kind of ark – one designed to help save the
world’s plants. The Great Lakes Radio Consortium’s Sandy Hausman
has that story:


(Sound of walking through the prairie up then under)


You might say Pati Vitt is looking for the right stock to fill the ark.
She’s dressed in jeans and a t-shirt, her long brown hair in braids, a field
notebook in hand, and a pencil tied to her pants. For nine months of each
year, she wanders along railroad tracks, through old cemeteries and
nature preserves, filling shopping bags with the seeds of prairie plants.


Vitt is a conservation scientist with the Chicago Botanic Garden. She has
studied these plants since she was a child. She knows their Latin names.
She dreams about them at night. She even knows the intimate details of
their reproductive lives:


“One does it having teeny little flowers and taking small little bees, and
another one does it by having huge flowers and lots of nectar and they
have really big bees or maybe a moth that pollinates them.”


And, she says, prairie plants are hearty. Native to the Upper Midwest,
they can handle icy winters and long, hot droughts, but they can’t fight
plows or bulldozers. Farmers and developers have destroyed almost all
the land where prairie plants once grew. Today, one-tenth of one percent
of the original prairie remains.


“That means that what we’re looking at right here is one-tenth of one
percent of the population that this plant once enjoyed. I’m sorry. Even
though there’s a lot in this prairie, this plant should be endangered,
because there are so few acres of its habitat left and everyday we’re
coming and we’re taking more and more of it. The prairie habitat is more
endangered than tropical rainforest.”


That worries Vitt, not only because she thinks the prairie plants are
beautiful, but because they may have value to people. For example, she
says about half of our modern medicines came – originally – from plants
or the fungus found in the soil beneath them.

“If you think about penicillin… penicillin came from mold. We might be
standing on a treasure trove of antibiotics, which we need, but if we let
the plants go, we let the soil fungi go, we let the potential antibiotics go.”


(Sound of seeds dropping into a jar)


So Vitt is collecting prairie seeds from about 1,500 plants and shipping
them to the English countryside.


(Sound of birds)


Just south of London, the British government has built what it hopes will
be the largest seed bank in the world devoted to wild plants. The
building looks like a series of greenhouses made from concrete, stone,
glass and steel. In the basement, fire and bombproof vaults hold billions of
seeds from 24,000 species:


“That’s the exciting bit. We thought big.”


Michael Way is a scientist at the Millennium Seed Bank. He says it’s
needed now because a lot of wild plants are in danger of
disappearing because of global warming and the pace of human
development. Way believes a third of the world’s plant species could be
gone by 2050.


“You hope that the worst is not going to happen. Of course, from time to
time the worst does happen. If a plant population is destroyed, if a
decision is taken to build houses or factories or roads on a particular area
which was home to some quite special plants, seed banking is one tool
you can use to protect that genetic diversity that might be unique to that
site.”


Each day, seeds arrive from Africa, Australia, Europe, the Middle East
and the Americas. They sit in colorful plastic crates — waiting to be
cleaned, dried and frozen. Way says these seeds could survive for a
century or more.


“Seeds are tough – small but tough, and the whole point of seeds is to be
dormant and allow themselves to be transported around, so unless we do
something really stupid, they will remain viable.”


Back in the U.S., Pati Vitt says seed banks like the one near London
could mean the survival of humanity, since people can’t live without
plants.


“I think fundamentally we all understand that we are a part of nature, but
in our daily lives we get so cut off from it that we forget.”


She sees the Earth as a garden, and she wants people to act like
gardeners. Setting up seed banks is an important first step.


“We will have the tools that we need to bring things back if necessary.”


For the GLRC, I’m Sandy Hausman.

Related Links

Beech Bark Disease Survivors Are Resistant

  • Beech bark disease often causes the tree's bark to become scaly. (Photo courtesy of Michigan DNR)

Researchers might have a partial solution to the problem of beech bark disease. The disease has killed millions of beeches in the northeast and is advancing on the woodlands of the Midwest. The Great Lakes Radio Consortium’s Tracy Samilton has this report:

Transcript

Researchers might have a partial solution to the problem
of beech bark disease. The disease has killed millions of beeches
in the Northeast and is advancing on the woodlands of the Midwest.
The Great Lakes Radio Consortium’s Tracy Samilton has this report:


Beech bark disease happens when an insect infests beech trees. Then the
trees are killed or crippled by an opportunistic fungus. Where the
disease has struck, researchers found one to five percent of the trees had
natural resistance to the insect.


Jennifer Cook is a USDA Forest Service researcher.Her experiments found that seeds from two resistant parent trees produced progeny that are also resistant. That could set the stage
for reforestation and even pro-active plantings.


“People can plant them before the disease gets there and
therefore lessen the impact on their forest lands.”


Cook says if you’ve got a big beautiful beech tree you want to save, you
can scrub the tree’s bark with insecticidal soap once a year. Of course
it would be impossible to scrub every beech tree in the forests.


For the GLRC, I’m Tracy Samilton.

Related Links

Will Chestnut Trees Make a Comeback?

  • Due to a blight, American chestnuts are now rare in the Midwest. (Photo courtesy of the National Park Service)

In the first half of the last century, there were millions of American chestnut trees ranging from the Eastern seaboard to the Upper Midwest. Now, there are virtually none… because a fungus killed them. A campaign is being launched to bring back a blight-resistant version of the chestnut… and it’s being planted here in the Midwest. The Great Lakes Radio Consortium’s Bill Cohen
reports:

Transcript

In the first half of the last century, there were millions of
American chestnut trees ranging from the Eastern seaboard to the Upper
Midwest. Now, there are virtually none because a fungus killed them.
A campaign is being launched to bring back a blight-resistant version of
the chestnut, and it’s being planted here in the Midwest. The Great
Lakes Radio Consortium’s Bill Cohen reports:


Sprouts from diseased chestnut trees don’t get the killer fungus until
they’re 4 inches tall, so researchers like Brian McCarthy of Ohio
University have had plenty of raw material to breed a new version of the
chestnut tree.


“Fifteen-sixteenths pure American chestnut and one-sixteenth Chinese
chestnut. And that one-sixteenth of the genome confers blight resistance.”


Ohio is now planting hundreds of the new seedlings on top of abandoned strip
mines. McCarthy believes they may help reclaim the land.


“It’s not that chestnuts like this kind of soil. It’s that probably that chestnuts can
tolerate this type of soil better than other broadleaf tree species can.”


McCarthy hopes that a century from now, the blight-resistant chestnut
trees will once again be prominent in forests, providing high-quality
lumber and food for wildlife.


For the GLRC, I’m Bill Cohen in Columbus.

Related Links

Region’s Farmers Brace for Soybean Disease

  • Soybean rust is starting to travel northward in the U.S. It can destroy a large percentage of yield, but researchers say that being prepared can prevent loss of crops. (Photo courtesy of the USDA)

A new invasive disease that affects soybeans may be on its
way to states in the Great Lakes region. Experts say it’s a serious disease – but their biggest challenge right now is calming farmers who fear the worst. The Great Lakes Radio Consortium’s Tracy Samilton reports:

Transcript

A new invasive disease that affects soybeans may be on its way to states in the Great Lakes region. Experts say it’s a serious disease – but their biggest challenge right now is caling farmers who fear the worst. The Great Lakes Radio Consortium’s Tracy Samilton reports:


Soybean rust is a fungus that attacks soybeans. It first appeared in China in the 1920’s. Soybean rust travels easliy and quickly on wind currents. It made its first U.S. appearance in 2004 in the southeast, probably arriving on the back of Hurricane Ivan. Experts say it could make its way to northern states this spring. John Whiteman is Director of the Indiana Soybean Board Research Program. He says he’s fielding a lot of calls from very worried farmers.


“They’ve heard the worst horror stories and they’ve not heard the other side yet. So all they’ve heard is the 80% yield loss, not that it can be controlled and here’s how you can conrol it.”


Whiteman says different types of fungicides can either prevent or kill soybean rust. He says farmers are being told to prepare ahead of time, so they won’t have to face devastating crop losses.


For the Great Lakes Radio Consortium, I’m Tracy Samilton.

Related Links

City Fights to Save Dying Elms

Dutch elm disease is killing dozens of stately old trees in the Midwest this summer. Many people say they regret losing the beautiful old trees. It changes the way a place looks and feels for years to come. Some people are willing to fight and pay to save the elm trees in one Chicago suburb. The Great Lakes Radio Consortium’s Jody Becker reports:

Transcript

Dutch elm disease is killing dozens of stately old trees in the Great Lakes region this summer. Many people say they regret losing the beautiful old trees. It changes the way a place looks and feels for years to come. Some people are willing to fight and pay to save the elm trees in one Chicago suburb. The Great Lakes Radio Consortium’s Jody Becker reports:


When Hollywood producers come looking for the perfect leafy suburb, they often wind up in Evanston, Illinois. This summer’s Tom Hanks flick “The Road to Perdition” was shot here. Filming almost hit a glitch…when Dreamworks suggested removing an old tree to make way for a driveway, the city balked. The scene was filmed; the tree stayed.


Evanston has dozens of trees at least a century old; and some even older than that.


Today, Evanston residents are even fighting a directive from the state’s Department of Transportation to replace obsolete traffic lights because it might mean uprooting some trees. So Evanston’s city Arborist Paul D’Agostino clearly has a rough job: he’s in charge of cutting down trees in a city of tree huggers.


“I’ve had to console people who were crying and hugging their tree and convince them that we were doing the right thing, that there was no choice in the matter.”


Like a handful of tree studded suburbs around Chicago and dozens of cities around the Great Lakes region, Evanston is experiencing a sad summer as Dutch elm disease claims dozens of trees more than half a century old and up to 70 feet tall.


Already more than one hundred Evanston elms have been found to have the killer fungus, and D’Agostino expects the toll to exceed two hundred. Once infected, a tree quickly begins to die…as the fungus blocks the vascular system that delivers water and nutrients to branches and leaves.


D’Agostino explains, standing near two dying elms in front of the Evanston Police Department…


“Both of these trees are in my estimation probably about 40 years old. These are pretty far along now in showing signs of disease…but the typical symptoms of yellowing and flagging leaves has now progressed to dead leaves and bare branches. We’ve got dying sucker growth along the main trunk which means the disease has spread into the main trunk and into the roots, so there’s no curing this tree at this point. The only way to solve this problem now is to remove the tree so it doesn’t spread to other nearby elms.”


(sound of sawing trees)


So five days a week, three crews of three men each are out on Evanston streets, taking down very old, very tall trees.


(sound of chain saw and crash)


For this relatively affluent, leafy suburb defined by its generous trees, the return of Dutch elm disease brings back bad memories of summers nearly 30 years ago, when hundreds of trees were cut down, destroying the canopies of tree tops that shade many of Evanston’s streets.


Still, there are 27,000 trees on city property in Evanston, and D’Agostino estimates three times that many on private property.


Today the suburb’s green and shade is created by a careful mix of hybrids and hardier trees, including Kentucky coffee, linden, gingko, honey locust and horse chestnut.


And the city is moving ahead with plans to continue replanting with diverse species to avoid future epidemics.


But ever a hotbed of activism, Evanston environmentalists of every stripe are on the case, badgering officials to do more than just identify and remove diseased trees.


Many want the city to inoculate the elms against the fungus.


“I’m a conservative republican, not at all a tree hugger. Al Gore and I would not mix ”


Virginia Mann has successfully organized the 13 other homeowners on her block to foot the bill to inject the elms on their street.


There are nine healthy elms on the block, and Mann and her neighbors have decided to adopt and inject three trees each year, at a cost of about $600 per tree.


“I know they add value to my community, I know they add value to my property, and I
know they keep my cooling costs down and I know there’s nothing I can do to replace them. So if you don’t take care of them, that’s it, they’re gone.”


While prognosis for the inoculated trees is excellent, there are no guarantees.
Dutch elm disease is spread both by beetles who carry the fungus on their hairs, and through root grafts between neighboring trees.


There is no way to protect the trees from root grafts. No one is sure why the disease is back and moving so aggressively.


Some citizens say, though inoculations can’t guarantee saving a tree, with only about 3,000 elms left in Evanston they’d rather try, than accept what the city officials seem to believe is the inevitable demise of the species in their suburb.
“Well, you can see my tree suffered an amputation this year.”


Mimi Peterson’s front porch on Ashland Avenue is shaded by a tall sturdy-looking survivor.


“It’s one of the few elms left on the block. You can also see across the street where we lost a really huge one. We’ve already lost nine trees on the block.”


She is well known in town for raising her voice as an advocate for trees; five years ago she hounded the city into more routine tree trimmings.


Now Peterson’s spearheading a group called TREE…To Rescue Evanston Elms, looking to suburbs like nearby Hinsdale…a place with more elm trees and a more aggressive Dutch elm disease prevention program.


Peterson says she agrees that diseased trees should go…but more needs to be done to protect still healthy elms.


Mostly Peterson’s group wants the city to spend more time and money looking for trees to save rather than trees to cut.


For the Great Lakes Radio Consortium, I’m Jody Becker.