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.

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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.

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Saving Frogs From Extinction

Scientists warn that we’re in the middle of a mass extinction. Frogs,
toads and other amphibians are dying off at an alarming rate. Rebecca
Williams reports a group of scientists wants to build an ark to stop
the extinctions:

Transcript

Scientists warn that we’re in the middle of a mass extinction. Frogs,
toads and other amphibians are dying off at an alarming rate. Rebecca
Williams reports a group of scientists wants to build an ark to stop
the extinctions:


In the last few decades, hundreds of amphibian species have gone
extinct. And several thousand more are on the verge of extinction.
One major threat is a killer fungus that’s wiping them out. Other
threats are habitat destruction and pollution.


A group called Amphibian Ark has announced a 40 million dollar plan.
They want to build special facilities at zoos and aquariums around the
world to take in endangered amphibians and keep them alive.


Kevin Zippel is the group’s amphibian program officer:


“The amphibian extinction crisis is probably the greatest species
conservation challenge in the history of humanity in terms of the
number of species in one group that’s being impacted.”


Zippel says putting frogs and toads into zoos is not a solution. But
he says he hopes it will buy time for more research… and eventually
get the animals re-established in the wild.


For the Environment Report, I’m Rebecca Williams.

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Cash Strapped Biologists Lean on Volunteers

  • The lynx was recently considered extinct in Michigan until a trapper caught one. (Photo courtesy of USFWS)

For years, federal and state governments have cut funding for wildlife protection. That’s led to complaints from biologists who say they don’t have enough money to adequately do their jobs, but it’s also led to a new movement. The Great Lakes Radio Consortium’s Celeste Headlee reports on how citizens are starting to take over duties once performed by trained scientists:

Transcript

For years, federal and state governments have cut funding for wildlife
protection. That’s led to complaints from biologists who say they don’t
have enough money to adequately do their jobs, but it’s also led to a new
movement. The Great Lakes Radio Consortium’s Celeste Headlee
reports on how citizens are starting to take over duties once performed by
trained scientists:


Ray Rustem says wildlife biologists these days are often chained to their
desks.


“Years ago, when I first started with the Department of Natural
Resources, wildlife habitat biologists spent quite a bit of time in the field
actually doing fieldwork. With the types of things that are going on now,
they’ve become much more in getting the planning done and we’ve had
to shift some of that fieldwork done to the technician level. Frankly,
yeah, we could always use additional people out there.”


Rustem is with the Wildlife Division of the Michigan Department of
Natural Resources. He says state funding has fallen steadily for years,
and one way he’s made up the difference is by involving Michigan
citizens. Rustem says the DNR uses dozens of volunteers for its frog and
toad survey in the early part of the summer.


“This is our tenth year and we’ve got at least 120 people who’ve been
doing this all ten years. That’s a tremendous amount of data that’s being
provided for us on information about species and where they’re located.”


Many groups are now using so-called citizen scientists to collect data.
Sally Petrella is a biologist who works with the non-profit organization
the Friends of the Detroit River.


“We’ve cut out so much of the funding for regular science that there’s a
real lack, and citizen scientists can cover far more areas than
professionals can, at a much lower cost.”


Petrella is standing beside the murky, reed-choked waters of the Rouge
River Watershed. It’s home to six species of frogs and toads. Every
summer, Friends of the Detroit River enlists the help of 700 people to
listen for the creatures as they call to each other from the marshy
grasses.


Petrella is standing beside one of her more loyal volunteers… Al Sadler.
Sadler admits that part of the appeal is the walk along the banks of the
river… but he also believes that public participation in wildlife
protection has become an absolute necessity.


“I think that it’s required if we plan on keeping any wildlife areas
around. I think that if citizens don’t get involved, I think that people
won’t know what they’re going to miss, and before we know it, there
won’t be much wild places left.”


Sadler is a fairly typical citizen scientist. He has a day job as an engineer
and volunteers in his spare time, but there are also people with advanced
degrees in biology and wildlife management who are called citizen
scientists simply because they don’t work for the government.


Dennis Fijakowski is one of those people. He’s the executive director of
the Michigan Wildlife Conservancy.


“We can’t count on the government to do everything for us. We have to
be a part of the solution.”


Fijakowski says ordinary people have made important contributions to
wildlife conservation. He says the lynx was considered extinct in
Michigan until a trapper caught one, and a rare Great Gray Owl was
discovered on a national wildlife refuge last spring by a photographer.


“You look back at the conservation history of our state and it was citizen
led. All of the important, the milestone decisions, legislation… it was
citizen led.”


John Kostyack with the National Wildlife Federation says involving
citizen scientists is great, but…


“They’re not really a substitute for having staff in the wildlife agencies…
state and federal and tribal. Because they are the ones who are going to
take this initial data, which is going to be very rough from volunteers,
and then use it to decide upon where to take the research next.”


And there have been cases in which citizen scientists have clashed with
state and federal governments. They are consistently at odds with government
officials over issues related to global warming and the Michigan Wildlife
Conservancy is locked in a bitter battle with state biologists over whether
the state is home to a viable cougar population.


The Conservancy’s Dennis Fijakowski acknowledges that the union
between government biologists and citizen scientists may not always be
an easy one, but he says the involvement of residents in the protection of
their state’s wildlife can only be a good thing.


“Because all anyone of us wants is that we pass on a wild legacy to our
children and grandchildren… and we’re not going to if we don’t get our
acts together.”


Many organizations offer citizens the opportunity to get involved in data
collection, including the U.S. Fish and Wildlife Service.


For the GLRC, I’m Celeste Headlee.

Related Links

Essay: Tuning in to Urban Frogs

  • Ed Herrmann tries to hear some frogs through the traffic near the Rouge River. (Photo by Ed Herrmann)

Each Spring, thousands of people spend their evenings listening to frogs and toads. It’s not just for fun. They’re helping assess the water quality of rivers and wetlands around the country. The Great Lakes Radio Consortium’s Ed Herrmann joined the search for amphibians, and has this essay:

Transcript

Each Spring, thousands of people spend their evenings listening to frogs and toads. It’s
not just for fun. They’re helping assess the water quality of rivers and wetlands around
the country. The Great Lakes Radio Consortium’s Ed Herrmann joined the search for
amphibians, and has this essay:


I’ve always enjoyed being outside and listening to nature. Recording nature sounds is a
hobby of mine. So when I saw an ad asking for people to listen for frogs and toads, I
thought, “All right. Beats watching campaign commercials.”


I called up Friends of the Rouge…(that’s a local group dedicated to helping out the Rouge
River watershed) and a few days later I got a package in the mail. It was full of maps and
information, and had a CD with the songs of the local frogs and toads. I studied my area,
and found some good looking wet spots where I thought they might live.


I memorized the sound of the Wood Frog (sound), Chorus Frog (sound), Spring Peeper
(sound), and American Toad. Then, on the first night when the temperature and wind
conditions were just right, I headed out to hear some frogs.


(sound of traffic roaring by)


I don’t know what I was thinking. This is suburban Detroit, not exactly a wildlife refuge.
In fact, the only animal I see is a rabbit dodging traffic. And the only thing I hear is…
(more traffic sound)


The Rouge River flows into the Detroit River and then Lake Erie. It used to be one of the
dirtiest rivers around, mainly from all the industry down by the mouth. That problem is
more or less under control but now there’s a larger one.


If you look at a map from the 1970s, you see miles of wetlands, small farms and
orchards. Today you see nonstop subdivisions and shopping malls. It might seem like
progress to you, but for the river, the constant barrage of fertilizers, pesticides, soap and
other chemicals that everybody uses to keep their suburbs looking pretty is a lot worse
than an occasional dose of battery acid from a factory. Also having acres of concrete
instead of wetlands means there’s nothing to soak up and filter the water, which means
after a big rain, it floods. It’s obvious this river needs some help.


(sound of river)


In 1998, volunteers began surveying the frogs and toads in the Rouge watershed. These
creatures were chosen because they sing, so they’re easy to track. The reason they’re
good indicators is that, like other amphibians, they absorb water through their skin. That
means they get poisoned by everything that we in the civilized world pour into the water.
Plus, their eggs hatch in water and their larvae (the tadpoles) live in water. It’s pretty
simple: if the water is good, there’s plenty of frogs and toads. If not, they disappear.


So, night after night, I’m out there listening. Listening in the dark. Listening hard.


Not a peep.


I’m beginning to think that the price of all these well-manicured lawns is a silent spring.
Then finally one night, (sound of American toads) the good old American toad! All
right, it is the most common species around, but at least it’s a start.


(sound of chorus frogs and green frogs)


A few weeks later, I join a group at a “mitigated” wetland. That means that when a
developer decided that a real wetland would be the perfect place to build condos and a
golf course, the government said, “Sure, go ahead. Drain it. Just be sure to dig a hole
over here and fill it with water.” Now, five years later, some frogs have moved in and
seem to be fine.


But they still have a little problem…


(jet roars overhead, followed by a few green frogs)


Ah, location, location. This new wetland is right
next to the airport.


Now, the reason these frogs sing is to attract a mate. So if nobody hears them, there are
not going to be any tadpoles to make next year’s frogs. In order to survive, they need not
only to sing, but to be heard.


For the Great Lakes Radio Consortium, I’m Ed Herrmann.


(frogs fade out)

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