Weed Killer Linked to Deformed Frogs

  • A study published in the journal Nature suggests the herbicide Atrazine is most likely to blame for frog deformities (Photo courtesy of the US Fish and Wildlife Service)

Researchers have more evidence
that a weed killer is causing frogs to
be deformed. Lester Graham reports the
herbicide is used on farms across the
country:

Transcript

Researchers have more evidence
that a weed killer is causing frogs to
be deformed. Lester Graham reports the
herbicide is used on farms across the
country:

Study after study has been trying to find out why so many frogs are turning up
deformed.

This latest study published in the journal Nature suggests the herbicide Atrazine—is
most likely to blame. Atrazine is used on corn fields, sugarcane, and even
evergreen tree farms.

Jason Rohr with the University of South Florida is the lead author of the study. He
says Atrazine in water leads to more parasites, flatworms called trematodes. They
cause the deformities and deaths of frogs. But wait, there’s more.

“The amphibians seem to be getting hit with a double-whammy because they also
seem to be have an increase in susceptibility to the trematodes, if they’re exposed to
Atrazine.”

Rohr says farmers could help the frogs if they’d just switch herbicides. But Atrazine
is cheap.

For The Environment Report, this is Lester Graham.

Related Links

Farm Chemicals Mixing Up Toads’ Sex

  • A study finds farm fields may not be the best environment for toads (Photo courtesy of the US Fish and Wildlife Service)

A new study connects chemicals from
farm fields to mutant toads. Rebecca Williams
has more:

Transcript

A new study connects chemicals from
farm fields to mutant toads. Rebecca Williams
has more:

This study looked at toads that live near farm fields and toads that live
near other kinds of not-so-pristine areas like parking lots.

The researchers found in areas with more agriculture – and more farm
chemicals – there were more mutant toads. They found male toads with
both male and female parts. Not ideal when it comes to mating.

Louis Guillette is an author of the study, in the journal Environmental
Health Perspectives.

“It may in fact be a mixture of chemicals along with who knows what
other variables, nutrition, other stressors, that may be leading to these
problems.”

He says next they’ll try to figure out what chemicals are at play, and
exactly how the toads are being turned into hermaphrodites.

For The Environment Report, I’m Rebecca Williams.

Related Links

Frogs: A Love Story

  • A Wyoming toadlet at the Detroit Zoo. (Photo by Danna Schock, National Amphibian Conservation Center)

There are thousands of kinds of frogs and toads that could go extinct
in our lifetime. Rebecca Williams reports zoos are trying to save the
most endangered frogs by playing matchmaker:

Transcript

There are thousands of kinds of frogs and toads that could go extinct
in our lifetime. Rebecca Williams reports zoos are trying to save the
most endangered frogs by playing matchmaker:


“Okay, so we’re in our Panamanian golden frog room.”


This is the frog bachelor pad.

(slow music)

The lights are low. One of the girls
is sitting naked under the waterfall. And in a dark corner of an
aquarium, there’s some action.


“Well, the male has clasped onto the female around the back…”


Danna Schock is like Dr. Ruth for frogs. She’s the curator of frogs
and toads at the Detroit Zoo. Right now she’s trying to get these
little yellow and black frogs in the mood.


“They were just put together a couple days ago, we’re not sure
they’re feeling it yet. I don’t know if we need Barry White music in
here or what.”


(Barry White song)

Getting the mood right matters because frogs are sensitive. The
temperature has to be just right. Sometimes what the male wants is
just not what the female wants.


Danna Schock wants these guys to have lots of babies. That’s because
frogs are in big trouble in the wild. They’re disappearing really,
really fast.


“The extinction going on is really of the scale that happened
at the end of the Cretaceous when the dinosaurs went. But that
extinction happened over a million years. We’re seeing some of this go
down in my lifetime. This is unprecedented.”


As much as half of all amphibian species on Earth could go extinct in
our lifetime. Here’s why. Frogs and toads breathe and drink through
their skin. Those thin skins make them very sensitive to pollution
from farms and industry and whatever we put down the drain. Also, the
places frogs live are being paved over for parking lots and
subdivisions.


Then there’s another really big problem. There’s a disease
sweeping through frogs around the world. It’s called chytrid fungus.
It can kill frogs in just a few weeks.


Kevin Zippel is the program director for Amphibian Ark. It’s kind of
like Noah’s Ark for frogs. It’s a group working with zoos to save the
frogs and toads that are most at risk. Especially the ones dying from
chytrid fungus.


“The only solution for those species that are susceptible is to bring
them into captivity as a stop-gap measure until the day when we do have
a cure for it.”


Zippel says chytrid fungus was first found in the 1930s in the African
clawed frog. That frog was exported around the world for medical
research. And scientists think the disease was spread with it.


Kevin Zippel says they’re scrambling to bring frogs into zoos before
they’re wiped out. He says it’s always much better for frogs to live
in the wild. But he says, for hundreds of frog species, taking them
into zoos is the only way to keep them alive.


The Wyoming toad is one species that’s been saved by zoos. For all
practical purposes, it’s considered extinct in the wild. Zoos around
the country have taken in the toads and gotten them to mate.


(Sound of tanks bubbling)


At the Detroit Zoo there’s a special quarantine room. It’s under lock
and key. We have to disinfect our shoes so we don’t track in bacteria
or other diseases.

Then Danna Schock lets us peek in on her
babies. These Wyoming toadlets are about the size of gumballs.


“These guys are fabulous little creatures. These are not divas.
They’re just such a pleasure to work with, they’re fun, they eat well.
There are just little Buddha bellies on ’em.”


These little Wyoming toads have big lives ahead of them. A lot of sex.
And their babies might get released back to the same place where they
got their name – Wyoming.


The US Fish and Wildlife Service has been releasing toad eggs and
tadpoles in a few protected areas there.


Brian Kelly is with the Service. Last summer, for the first time in 10
years, his team found new Wyoming toad eggs in the wild.


“It’s incredibly encouraging because that’s why we’re doing this, we
want to establish populations that maintain themselves and remain
viable over time.”


Kelly says the toads are still in trouble. Their habitat has to be
protected. And the fatal chytrid fungus is still a major threat. So
zoos will have to fill the gap for a while.


It’s not ideal. It costs a lot to keep frogs at the zoo. There isn’t
enough room in zoos to save every type of frog. And, as Danna Schock at
the Detroit Zoo will tell you, it’s tough to figure out exactly what
the frogs want. But she says she’s not going to give up.


“I’d rather go down flailing in flames. At least we can say we tried.
And there are reasons to be optimistic. We have had successes – and
they’re scattered, and they’re patchy, and we learn from our mistakes all
the time.”


Schock says it would be much better to solve the frogs’ problems in the
first place. She says that means not paving over all the wetlands. It
means not polluting ponds and creeks. And hopefully, finding a cure
for chytrid fungus.


For The Environment Report, I’m Rebecca Williams.

Related Links

Dire Warnings From Worldwide Frog Study

  • Due to many different catalysts, including climate and habitat change, amphibians are said to be rapidly disappearing. (Photo by Linda Lundberg)

The most comprehensive study of amphibians ever done
shows nearly a third of species are threatened with extinction. The
Great Lakes Radio Consortium’s Erin Toner reports:

Transcript

The most comprehensive study of amphibians ever done shows nearly a third of species
are theatened with extinction. The Great Lakes Radio Consortium’s Erin Toner reports:


More than five hundred scientists from more than sixty nations were involved in the
recent Global Amphibian Assessment. The three-year study looked at the status of more
than 5700 known species of frogs, toads, caecilians, and salamaders. It found out that
more than thirty percent of them are near extinction. In the Americas and Australia,
outbreaks of a highly infectious fungal disease have hurt amphibian populations.


But worldwide, the report says the biggest factors for the decline are habitat destruction
and pollution. It also says since amphibians depend on freshwater to survive, the loss
of species shows the Earth’s freshwater supply is in danger. But scientists say the
negative trend could reverse with a swift commitment of resources, such as creating new
protective areas and captive breeding grounds, and better protection of fresh water.


For the Great Lakes Radio Consortium, I’m Erin Toner.

Related Links

Climate Change Affecting Backyard Wildlife

A recent study in the scientific journal Nature suggests the effects of global warming can be seen in people’s backyards. The Great Lakes Radio Consortium’s Erin Toner reports:

Transcript

A recent study in the scientific journal Nature suggests the effects of global warming
can be seen in people’s backyards. The Great Lakes Radio Consortium’s Erin Toner reports:


The study compiles data from scientific papers on climate change and from personal
nature recordings from people all over the world. It finds that plants and animals
appear to be changing their behavior in response to increases in the average global
temperature over the past century.


Michigan State University researcher Kim Hall contributed to the report. She says
for many species, spring events are happening about five days earlier every ten years.


“Those include things like the first arrival dates of birds when they’re migrating into
their summer habitat. Also, sounds, like the first calls of frogs and toads when they
begin the breeding season in the spring. And there’s a lot of different things
related to the timing of plants, such as the first time they bloom in
the spring or when fruits arrive.”


Hall says it isn’t known how earlier springs will affect the environment. But she says they
could spell trouble for many species if food supplies and habitats are not protected.


For the Great Lakes Radio Consortium, I’m Erin Toner.

Unique Industrial Land Seen in New Light

  • Marian Byrnes has been called the "environmental conscience of the Calumet." She has been a key leader in getting the city of Chicago, and the state of Illinois, to see the value of Calumet's natural areas. Photo by Mark Brush.

In an area in south Chicago you can see the remnants of a steel industry that has had better days – silent smokestacks looming on the horizon, empty parking lots, and for sale signs in front yards. The Calumet region was once a haven for big industry… and because of that it is also home to a list of seemingly endless environmental problems. Many people thought the problems were too great to overcome, but as the Great Lakes Radio Consortium’s Mark Brush reports… that attitude is changing:

Transcript

In an area in south Chicago you can see the remnants of a steel industry that has had better days – silent smokestacks looming on the horizon, empty parking lots, and for sale signs in front yards. The Calumet region was once a haven for big industry… and because of that it is also home to a list of seemingly endless environmental problems. Many people thought the problems were too great to overcome, but as the Great Lakes Radio Consortium’s Mark Brush reports…that attitude is changing:

If you’ve ever driven by Chicago’s south side, you’ve likely seen the smokestacks and factories that dot this old industrial area.

But when you get off the main highway and drive down the back roads of Calumet, you see something you wouldn’t expect – remnants of unique wetlands and prairies. It’s an area where thousands of migrating birds come each spring. Herons, egrets, and cranes carefully pluck their food from these marshes – marshes that are right next to chemical factories and toxic city dumps.

(Bring up sound of sparrows and outdoors)

The sun is setting in this part of the Calumet – some sparrows nearby are settling down for the night – and Marian Byrnes is showing me around the places she’s come to know from living and working here for more than 20 years.

“This land is mostly slag on the banks of Indian Creek, but it’s not considered hazardous.”

“How would the slag get here?”

“Oh, it was waste from Steel Mills – mostly Republic Steel which was north of here.”

(Fade her under + continue outdoor sound)

Marian Byrnes is a retired public school teacher. And at age 76, she volunteers her time as the executive director of the Southeast Environmental Task Force. She repeatedly meets with businesses, community groups, and city and state advisory boards – patiently delivering her message that the Calumet region is worth protecting.

And over the years Marian, and others like her, have steadily worked against a city that didn’t seem to care about the natural areas in Calumet. For many of them, it began more than twenty years ago, when they got a note from the Chicago Transit Authority in their mailbox. The note outlined the Transit Authority’s plan to build a bus barn on their neighborhood’s prairie:

“It was like having our own little forest preserve right behind our houses. You can walk out there, and when you get out – maybe a block or so – you’re not aware that you’re in the city at all. I mean you can’t even see the houses, so it’s just a wonderful place to be in touch with nature.”

They convinced the transit authority to build the bus-barn elsewhere. And in the years that followed they fought off other proposals such as plans to build a toxic waste incinerator, and plans to re-open old city dumps.

But despite those successes, big environmental problems still persist. And the list of contamination is intimidating – heavy metals, PCBs, and leaking landfills. The problems are so overwhelming that when planners in Chicago were thinking about spreading miles and miles of concrete for a new airport, Calumet was thought of as an ideal location.

Kathy Dickhut works in the planning department for the city of Chicago:

“The area does have a lot of environmental problems. Ten years ago the thinking was it was all dirty, environmentally dirty, and that was sort of across the board, …so one way to deal with that is, you know to cover the whole thing up.”

But local environmental and community groups became united in their opposition to the plan. And instead of an airport, the local groups asked the National Park Service to designate the area as an ecological park.

And slowly but surely, the city began to look at the area in a new light:

“I think people didn’t realize just how much opposition there would be to paving over this area. I mean the airport proposal was quite dramatic, and because it was quite dramatic, there was quite dramatic outcry about it – so once that played out – we had to look at it again in a different way. And what we’ve done is really look at the resources that we do have here, which are substantial, and how we can improve those.”

Today, the city appears to have a completely different attitude about the Calumet area. Chicago lawmakers recently passed a land use plan that calls for the best of both worlds. They want to protect and clean up the natural prairies and wetlands – while at the same time – attract new businesses to build on old industrial sites.

City planners hope to balance what may be seen as competing goals (attracting new industries AND cleaning up the environment) by prioritizing where to build and where to preserve. And when they do build – planners are encouraging green building practices. Practices that complement the surrounding natural areas rather than cover them.

Those involved with the project paint a pretty nice picture of what’s to come.

Lynn Westphal is a researcher for the U.S. Forest Service, and works closely with the city of Chicago on the Calumet project: “Imagine an industrial area with the buildings roofs are green. Where instead of turf around – you have native grasses and because of that you have more birds and butterflies… you’ve got bicycle access, people fishing on their lunch breaks…. And it’s not far from becoming a reality. This is all very doable. So it’s not totally hypothetical.”

And in fact, movement toward that new vision is already underway. The Ford Motor Company is building a new industrial park for its suppliers. And many of the green building practices Westphal describes will be used. And the Corps of Engineers is spending more than 6 million dollars to clean up an area known as Indian Ridge Marsh.

But those involved with the transition of this area say that leadership from the community will be the key to its eventual success.

Meanwhile, the Southeast Environmental Task Force will have a new executive director by this summer…

“…and that’ll be someone who’ll learn to do what I’ve been doing for past 20 years, cause I can’t keep on doing it indefinitely.”

“Do you have any advice for them?”

“Have a lot of patience…”

The same patience Marian Byrnes has used when riding a city bus to meeting after meeting, listening to the community, and working with city officials – all in an effort to create what she believes will be a better future for the people in Calumet.

For the Great Lakes Radio Consortium, I’m Mark Brush.

Frogs Help Us Understand Human Effects

Frogs and toads have lived on earth for more than 100-million-years. Theysurvived whatever extinguished the dinosaurs, yet in our age, they seem tobe vanishing. Reporting for the Great Lakes Radio Consortium, Mary Losure(low-sure) examines this scientific mystery, in the first of a three-partseries. It’s a detective story in which the victims are frogs, notpeople…but people may have a big stake in the mystery’s solution.Amphibians are sensitive indicators of environmental problems. If we canfind out what’s killing frogs, we may also learn if it will someday harm us:

Vanishing Frogs – The Possible Culprit

Frogs and toads are disappearing all over the world…and no one knows allthe reasons why. The destruction of wetlands and other places whereamphibians live is one of the major causes…but frogs and toads have alsobeen dying out in protected sites far from any human disturbance. Worldwideenvironmental problems – airborne contaminants, global climate change, orhigher than normal ultraviolet light from the earth’s thinning ozone layer -have all been linked to frog disappearances, but now there’s hard evidenceof another possible culprit. Mary Losure (low-sure) reports for the GreatLakes Radio Consortium on the worldwide vanishing of frogs. This secondreport in our series begins in the Panamanian rain forest:

Deformed Frogs Spell Trouble for Humans

In the years since the first reports about the disappearance of frogsworldwide, many researchers have warned the plight of amphibians may be anearly sign of environmental problems that could affect humans. More recentreports of DEFORMED frogs have added to these concerns. Mary Losure(low-sure) has the final report in our series for the Great Lakes RadioConsortium: