Tag: habitat

Seeing Snakes as Worth Saving

  • Biologist Tobi Kiesewalter takes out a black rat snake at the visitor's center at Murphy's Point Provincial Park in Ontario. (Photo by Karen Kelly)

As kids, many of us come to see
snakes as frightening, evil creatures.
In some places, that ingrained fear
has taken a toll on the snake population.
Karen Kelly met up with some folks
who are trying to improve one snake’s
image – before it disappears:

Transcript

As kids, many of us come to see
snakes as frightening, evil creatures.
In some places, that ingrained fear
has taken a toll on the snake population.
Karen Kelly met up with some folks
who are trying to improve one snake’s
image – before it disappears:

(sound of truck, bumping on a road)

George Sheffield drives his truck along the dirt path that leads to his family’s
vacation cottage. He keeps an eye out for long, black snakes.

“It might be a good day to see a snake. It was cold last night so they’ll be
looking for sun today to heat back up.”

Sheffield’s land is one of the few places where black rat snakes still thrive in
Ontario. They’re a threatened species here, partly because people have moved
into their habitat.

But also, because they’re often six feet long, so people get scared and kill them.
The black rat snake is the longest snake in Canada. It’s not poisonous, but it’s a
constrictor that eats small animals.

(sound of walking towards cottage)

Once we’re at Sheffield ‘s camp, he checks out one of the snakes’ favorite spots
– the roof of his cottage.

“The one time, there 3 or 4 out on the roof, with portions of others, with their
heads or tails sticking out of soffits. So they do inhabit the cottage. I wish they
didn’t, but until I fix it, I can’t blame them.”

Sheffield is one of a growing number of landowners who are trying to protect
the black rat snake. They’re putting up nesting boxes in fields and wooded
areas to give the snakes a warm and safe place to spend the winter.

But the biggest challenge is just convincing people not to kill them.

Kiesewalter: “Do you want to hold the snake?”

Children: “He’s pretty heavy.” “He feels kind of like rubber.”

Tobi Kiesewalter is a biologist at Murphy’s Point Provincial Park in
southeastern Ontario. It’s used by as many as 500 black rat snakes – as well as
a lot of campers, swimmers, and boaters.

It’s a perfect chance to teach people about the snake. So every day, Kiesewalter
takes a rat snake out of a cage in the visitor’s centre and tries to persuade people
to leave them alone.

“I hear about it all the time, people coming and telling us about how their dad
had killed snakes before. Kids will tell you anything. And, as with many
reptiles, the loss of even one mature adult can cause a dip in population because
we know they’re only reproducing every two years.”

There’s a lot of effort to help this snake. Culverts are dug under highways to
give them a safe route back and forth. There are road signs that say, “Please
brake for snakes.” There’s even an adopt-a-snake program.

But the fact is, the black rat snake isn’t in danger in other parts of North
America. So why save it here?

For George Sheffield, the answer is simple.

“I grew up with them here, I think it would be a shame if man’s activities
caused the end of another species in another area. We’ve already done way too
much to degrade the environment and the number of species, so anything
anybody can do is good.”

For The Environment Report, I’m Karen Kelly.

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Pet Pythons on the Loose in Florida

  • JD Willson holding a juvenile python. (Photo by Samara Freemark)

Foreign animals that get released
in the wild usually don’t spark that
much interest. But when that species
is a giant snake, well, most people
sit up and take notice. That’s the
problem facing the state of Florida,
where Burmese pythons have moved in
to Everglades National Park. Now,
scientists are trying to figure out
if the snakes could spread to the
rest of the country. Samara Freemark reports:

Transcript

Foreign animals that get released
in the wild usually don’t spark that
much interest. But when that species
is a giant snake, well, most people
sit up and take notice. That’s the
problem facing the state of Florida,
where Burmese pythons have moved in
to Everglades National Park. Now,
scientists are trying to figure out
if the snakes could spread to the
rest of the country. Samara Freemark reports:

Meet South Florida’s newest invasive species – the 20 ft long, 200 lb,
Burmese python.

“They’re impressive animals. They’re really impressive animals. And
they’re breeding
like crazy out there.”

That’s python researcher JD Willson. He says the pythons probably started
off as pets –
until their owners got bored of them and dumped them in the Everglades. Now
those pets
have procreated their way into a huge wild population.

“Certainly thousands. Certainly tens of thousands. Some people have gone
as far as to
say hundreds of thousands.”

Willson says most pythons won’t attack humans. But they do pose a big
threat to local
ecosystems.

“These are snakes that are top predators. They eat alligators, they got a
bobcat record, a
couple of white tail deer. These are a predator that native wildlife are
just not prepared to
deal with. They’re not used to having a giant snake around.”

Florida lawmakers are considering putting a bounty on the pythons – paying
hunters to
kill them. And people in neighboring states just have their fingers crossed
that the
pythons won’t spread north.

But no one really knows enough about the snakes to come up with a good
control plan.

Willson and some other researchers are trying to change that.

“This is the python enclosure.”

They’ve built a little artificial habitat in South Carolina, surrounded
it with a really tall
wall, and filled it with 10 pythons. The researchers want to learn more
about how the
snakes behave in the wild, and see if they can make it through a winter
with freezing
temperatures.

(sound of door opening)

The snakes are tagged with radio transmitters, so the scientists can track
them and record
data on how they’re doing.

Freemark: “It’s safe to be in here?”

Bower: “Oh yeah, they’re not aggressive.”

Inside a student volunteer, Rick Bower, is tracking the snakes with a radio
receiver.

“As you sweep it across, you can see how the signal strength changes and
you get an idea
of where the strongest signal is coming from.”

The receiver tells us we’re basically standing right on top of one of the
pythons.

“Yeah, he’s right at our feet. Yeah, he’s down there.”

But we don’t see anything, even when Willson starts jabbing a stick at
the source of the
beeping.

“Somewhere within an 8 foot radius of where we are, there’s an 11 foot
snake. And he’s
hiding in this aquatic vegetation. And not only can we not see him, but
poking in the
vegetation doesn’t seem to be eliciting too much of a reaction.”

He’s a really sneaky snake.

Whit Gibbons is also working with the crew. He says that if the scientists
have so much
trouble tracking down their pythons, in an enclosed cage, using radio
transmitters –
there’s no way bounty hunters could make even a dent in the Everglades
python
population.

“So they find a hundred, so what. There’s a hundred thousand left. No
one’s going to find
100,000. I mean, we’ve got ‘em in a small enclosure, 10 big snakes,
over 75 feet of snake
if you add them up. And you can’t find them.”

Instead, Gibbons says people could opt for a harm reduction strategy- focus
on limiting
the spread of the snakes, try to protect species they threaten.

“One position is, ‘okay, they’re here, here’s what they can do to
us, or to our pets, or to
the wildlife. Let’s learn to live with them.’”

The South Carolina python study ends next summer. JD Willson says he’s
not sure what
they’ll do with the snakes afterwards. But he does know one thing –
they’re not going to
release them back into the wild.

For The Environment Report, I’m Samara Freemark.

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Saving the Snail Kite

  • Environmental scientist Rachael Pierce and her team travel on airboats into the marshes around Lake Okeechobee. (Photo by Rebecca Williams)

We’ve spent billions of dollars
just trying to partially restore
the Everglades in Florida. Now,
there’s a struggle to save a bird
there that’s close to extinction.
It’s a raptor called the snail kite.
It’s becoming one of the symbols
for saving the Everglades. Rebecca
Williams has more:

Transcript

We’ve spent billions of dollars
just trying to partially restore
the Everglades in Florida. Now,
there’s a struggle to save a bird
there that’s close to extinction.
It’s a raptor called the snail kite.
It’s becoming one of the symbols
for saving the Everglades. Rebecca
Williams has more:

The snail kite eats pretty much only one thing – a snail called the apple snail.

The apple snail’s been disappearing – partly because of people messing with water levels in the Everglades for farming and cities.

Scientist Rachael Pierce and her team have raised apple snails in the lab and let them go in a marsh at the edge of Lake Okeechobee. Now they need them to stick around and have babies.

“It’s unlikely the snail kites will come back here to this marsh because we haven’t released that many snails. But in the future when we scale this up we do hope to start seeing snail kites.”

The survival of the snail kite depends on this working. And, some people say, if the snail kite goes extinct, things won’t look good for the restoration of the Everglades.

For The Environment Report, I’m Rebecca Williams.

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Taking Down Levees in Louisiana

  • The Mollicy Farms River Forest Levee (Keith Ouchley, Louisiana Nature Conservancy)

Man made levees line the banks
of the Mississippi River and its
tributaries. They protect towns
and they allow farmers to plow
the bottomlands. But levees come
at a price: habitat destruction
and worse flooding downstream.
Now, more people are calling for
taking down levees and returning
floodplain areas to their natural
state. Samara Freemark
reports from Louisiana – the end
of the line for the water that
drains from the middle of the nation:

Transcript

Man made levees line the banks
of the Mississippi River and its
tributaries. They protect towns
and they allow farmers to plow
the bottomlands. But levees come
at a price: habitat destruction
and worse flooding downstream.
Now, more people are calling for
taking down levees and returning
floodplain areas to their natural
state. Samara Freemark
reports from Louisiana – the end
of the line for the water that
drains from the middle of the nation:

The Mollicy Farms site in Northern LA provides a striking example of just how dramatically a levee can remake a landscape.

“Here comes the river down through here.”

Keith Ouchley is with the Nature Conservancy, and he’s showing me an aerial photo of Mollicy Farms. The site is split in half by a river. On the west side, there’s 30000 acres of primeval forest. On the east side, a swath of cleared land.

“Once, it was forest in the lower area of tupelo and in the upper areas of sweet gum. And every year the river would overflow and flood the forest.”

In the late 1960s, soybean farmers cleared the area built levees to hold back the annual floods – giant earthen walls, 150 ft wide at the base and 30 feet tall. Ouchley grew up in the area. He remembers the first time he saw the site after the clearing.

“I thought at the time you could almost see the curvature of the earth, looking across this massive clearing up there.”

Levees protect a lot of land for farming. But some people are starting to wonder if they’re worth the cost – not just the money it takes to build and maintain them, but the damage they do to ecosystems.

Denise Reed is a geologist at the University of New Orleans. She says hundreds of species depend on floodplain habitats- and without flooding, those habitats vanish.

“The river is the lifeblood of floodplain and delta ecosystems. When you build levees and you cut it off, we cut off those habitats from the river. And essentially they just degrade and die. Putting it back would definitely be a good thing.”

Levees might also raise the chances of truly catastrophic flooding downstream. Whenever there’s a lot of water in the river – say, there’s heavy rain upstream – that water shoots straight down the channel with enormous force. And it sometimes breaks through downstream levees that protect homes.

If you take down levees upstream some of that water has somewhere else to go – out into the forest or wetlands, where it spreads out across thousands of acres.

All of which is why Denise Reed says, instead of building more levees, it might be a good idea to take some down.

“Just because we’ve had levees on the river for the last hundred years or so doesn’t mean to say we’re always going to have levees on the river. The challenge for us is letting nature do its thing while still allowing us to navigate on the river and bring ships in, and that kind of things, and for us to live places where we’re not going to be flooded out. We can do that.”

After catastrophic flooding in 1993, the federal government started buying up levee-protected land along the Mississippi and its tributaries with an eye towards restoring floodplains. But the memory of that flood faded and funding for the program fell off.

That left private groups like the Nature Conservancy to take up the effort.

This summer they’ll punch holes in the levee at Mollicy Farms. As the water rises in the spring, it will gradually seep out onto the landscape, restoring the floodplain.

“50 years, 100 years, you’ll be able to take a boat out through nice, mature, bottomland hardwood floodplain forest. You know, see water moccasins and catch bluegill brims and alligators floating on logs and that kind of thing.”

Ouchley says he’d like to see the program replicated in floodplains all over the country.

For The Environment Report, I’m Samara Freemark.

Related Links

Should Zoos Keep Elephants?

  • Some zoos have stopped keeping elephants, because they feel they can’t provide the best care for them any more. (Photo by Lauren Humphries, courtesy of the National Biological Information Infrastructure)

News of a zoo being investigated and fined has reignited the debate over keeping elephants in captivity. Rebecca Williams reports:

Transcript

News of a zoo being investigated and fined has reignited the debate over keeping elephants in captivity. Rebecca Williams reports:

It’s just been revealed that the Los Angeles Zoo was fined for the death of an elephant back in 2006. The zoo does not admit any wrongdoing.

But some people believe keeping elephants in zoos is wrong.

Suzanne Roy is with the group In Defense of Animals. She says elephants in captivity often have foot problems from standing on hard surfaces.

“It’s just incredible the level of suffering these elephants are put through before they eventually literally can’t stand on their own feet or legs anymore.”

But the Association of Zoos and Aquariums says its zoos have to meet high standards of care for elephants.

Paul Boyle is the group’s senior vice president for conservation.

“There are no people more committed to keeping elephants in good health and humor than those professionals at zoos across the country.”

Some zoos have stopped keeping elephants. Some, because they feel they can’t provide the best care for elephants any more.

For The Environment Report, I’m Rebecca Williams.

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‘World’s Biggest Company’ in Crisis

  • The Black-and-White Ruffed Lemur, threat category: Critically Endangered (Photo by Jean-Christophe Vié, courtesy of the IUCN)

There’s a new report out on the
state of the world’s creatures.
It’s called the Red List of Threatened
Species. And, as you can imagine,
the Red List is not a good list to
be on. Mark Brush has more:

Transcript

There’s a new report out on the state of the world’s creatures. It’s called the Red List of Threatened Species. And, as you can imagine, the Red List is not a good list to be on. Mark Brush has more:

This report is put out by the International Union for Conservation of Nature. They cataloged about 45,000 species worldwide. They say about 38% of those are threatened with extinction.

Species sometimes naturally go extinct. But, the researchers say, today’s extinction rates are happening a lot faster – mostly because people are destroying habitat.

Jean-Christophe Vié is the senior editor of the report.

“If you think of nature as a company, it’s the largest in the world. So now we are in this economic crisis, if there was one company to save, it’s not the car industry, or saving a bank – it’s saving nature, because it’s for the benefit of all of us.”

Vié says they were only able to report on about 3% of all the known species around the world.

But, they still feel they have a pretty good idea of the overall trend. And it’s not a good trend.

For The Environment Report, I’m Mark Brush.

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How the West Was Warned

  • Wen Baldwin, a volunteer with the National Park service, pulls a non-stick teflon frying pan out of Lake Mead, the reservoir of Hoover Dam. Quagga mussels smothered the pan in a matter of weeks. (Photo by Shawn Allee)

A tiny aquatic pest called the
quagga mussel is invading lakes
and streams across the country.
It’s even clogging up pipes in
some big-city water systems, dams,
and power plants. When environmental
disaster strikes, sometimes people
scratch their heads and ask: how
could this happen? Shawn Allee reports, in the case of
one quagga mussel invasion, people
got plenty of warning:

Transcript

A tiny aquatic pest called the
quagga mussel is invading lakes
and streams across the country.
It’s even clogging up pipes in
some big-city water systems, dams,
and power plants. When environmental
disaster strikes, sometimes people
scratch their heads and ask: how
could this happen? Shawn Allee reports, in the case of
one quagga mussel invasion, people
got plenty of warning:

n 2007, biologists declared that quagga mussels had infested infested Lake Mead just outside
Las Vegas.

But years before that, park staff and volunteers like Wen Baldwin told folks how to avoid the
problem.

Baldwin says some people helped – most people told him to just drop it.

“Oh, it won’t happen to us. That’s the American theory – fire, cancer, whatever. Oh, it
won’t happen to me.”

But it did happen, and here’s how it went down.

Baldwin went to this conference out East where biologists explained how quaggas clog pipes at
water treatment centers and power plants.

“There was a presentation about them and I realized, hey, they could get in here and they
could cost me money, you money, everybody money. They could raise havoc as they have in
the Great Lakes.”

Baldwin got worried.

Quagga mussles hitchhike on boats, and Lake Mead is a boating hot spot.

Baldwin warned people – wash down your boat before you put it in the lake!

“I put on a lot of programs trying to get people on board. Just didn’t work that well.”

Now, quagga mussels are making a mess of Lake Mead – and Web Baldwin can show how.

Baldwin tests how well quagga stick to different material.

We’re on this dock one morning, and he pulls a rope out of the water.

The rope’s covered with shells that look like fingernail-sized clams.

Allee: “I reckon you have to be pretty careful with your hands, there.”

Baldwin: “Boy, they’ll cut you to ribbons. I go home looking like my hands went through a
meat grinder.”

At the end of the rope – he’s tied a skillet.

Baldwin: “They’ll stick to teflon.”

Allee: “They’ll stick to teflon. Your eggs won’t stick to teflon all that well, but quagga
mussels will.”

Baldwin: “They will. And anywhere they attach the glue they use will hasten the
deterioration of the surface they attach to.”

A quagga-coated teflon pan is a shocker – but what does a quagga invasion mean?

Well, for one, if you dock your boat at Lake Mead – you’ve gotta scrape it all the time.

Swimmers wear shoes to protect their feet from quagga-coated rocks.

And quagga are getting costly.

Zegers: “We’ve been monitoring water quality in the lake pretty extensively.”

Roefer: “These are the six locations we collect samples at.”

I’m with Ron Zegers and Peggy Roefer. They’re with the Southern Nevada Water System. It
provides water to Las Vegas and other cities.

They walk me through slides divers took near water intake pipes – deep in Lake Mead.

Roefer: “And this is where our intake is, on Saddle Island. This is actually the inside of the
rock structure you can see the quaggas on the inside of that. Quagga mussels were
approximately two inches thick.”

Zegers and Roefer say they’re trying plenty of things to keep quagga out of the water supply.

The first is the old stand-by: chlorine.

But too much chlorine can make people sick.

Zegers: “More of those disenfection byproducts form, which puts us closer to our
regulatory compliance issues, so we also have to be concerned about that also.”

Roefer: “You know we’re watching the alternative control strategies, the bio-bullets and
pseudo-flourence and those kinds of things.”

Allee: “Sounds like an arms race.”

Roefer: “Yeah, who can get there first. The annual for this is one to four million dollars.”

Allee: “One to four million dollars. You know, you could clean a lot of water if you didn’t
have to deal with these critters.”

Zegers: “That’s correct. Now it’s just an anticipated expenditure that certainly wasn’t
budgeted for when they first appeared, and now it’s just gonna be a way of life.”

And it could become a a way of life for more lakes if we don’t stop quaggas from spreading
around.

For The Environment Report, I’m Shawn Allee.

Related Links

Keeping Panthers and People From Colliding

  • Rebecca Galligan with her dogs Roscoe and Sable in their new panther-proof pet house. Galligan and her husband lost their dog Riley to a panther, so they had this enclosure built to keep their pets safe. (Photo by Rebecca Williams)

People are killing Florida panthers.
Usually it’s not intentional. But
Rebecca Williams reports biologists
are trying to figure out how to keep
panthers and people from running into
each other:

Transcript

People are killing Florida panthers.
Usually it’s not intentional. But
Rebecca Williams reports biologists
are trying to figure out how to keep
panthers and people from running into
each other:

There are only about 100 Florida panthers left in the wild. They’re endangered.

If you live down here, it’s one thing to know there are panthers hunting for food in the Everglades. But it’s something else when they visit your backyard.

(sound of tropical birds singing)

Rebecca Galligan and her husband didn’t give panthers all that much thought. Until one day, when they came home from work, and found their dog Riley had been killed.

“The scratches on the body and the way he’d been killed it was pretty obvious it was some sort of wild cat.”

Two days earlier something had killed their neighbor’s sheep. Then a dozen goats got killed.

A biologist decided the predator was a panther. In the past few years in South Florida, more people have been losing pets and farm animals to hungry panthers.

Galligan calling to dog: “C’mere, have a seat!” (Roscoe sniffs the microphone)

Now, when she’s away, Rebecca Galligan keeps her dogs Roscoe and Sable in a little panther-proof house. It’s made out of steel and chain link fencing.

“There’s so much nature and wildlife, and so I mean, we just can’t destroy it all because we want to be safe. That’s why we had this pen built, so we can keep the animals a little safer from the animals that live around us.”

And a lot of people here think the panthers have a right to stick around.

But some say there’s a gaping hole in the law that’s supposed to protect panthers.

The panther has never had what’s called critical habitat set aside. That means developers don’t have to consider the land panthers need to survive. Panther habitat or not, they can just build.

So panthers are getting crowded out by subdivisions and huge new cities.

Andrew McElwaine is president of the Conservancy of Southwest Florida. He’s asked the Obama Administration to officially give panthers that habitat.

“So, the more habitat we take away, we’re forcing panthers to move out. We’re getting reports of panthers in urban areas of Southwest Florida looking for somewhere to live, if you will.”

And, as people move in, panthers are becoming roadkill.

Last year 10 panthers were killed by cars. So far, this year, six more panthers have been killed.

(sound of cars whizzing by)

“There are some panther tracks here. There’s one there… and there…”

Mark Lotz is a panther biologist. We’re hanging out in an underpass below the highway. It was built for panthers. Miles of fences run along the highway and make a funnel, so panthers have to go below the road.

Lotz says there are 36 panther underpasses on this stretch of highway. And he says fewer panthers get hit here. But underpasses are expensive – about $2 million each. And giving panthers room to live isn’t always even that simple.

Lotz says the biggest challenge is getting people to adapt to panthers. To him, the cats are majestic. But he also knows a lot of people think they’re terrifying. Somebody actually shot a panther a few months ago.

“Naysayers could make the argument there’s no panthers in Pennsylvania or any other eastern state and things are going just fine. But then I would counter – look what’s happening with deer populations there. You know, panthers are part of the ecosystem. Without them there’s just something missing. In a way part of the wildness disappears.”

But if panthers keep running out of space, they could disappear.

We talked to the Secretary of the Interior, Ken Salazar. And we asked him whether he’d set aside critical habitat for panthers.

“Yeah, we’ll have to get back to you on that.”

That’s been the kind of response he’s given to other reporters too.

Giving panthers habitat protection would mean more obstacles for developers. And, in this economy, that could be pretty unpopular.

For The Environment Report, I’m Rebecca Williams.

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Building Penguin Beach Homes

  • The penguins' natural shelter (their own dung) is being removed from the landscape for fertilizer. So, conservationists are supplying penguins with artificial homes in which to nest. (Photo by Frank Olivier)

Along with lions and elephants, Southern Africa is home to a species of penguin. But the African penguin population is dwindling – and scientists are trying to turn things around for the bird. Ann Dornfeld reports:

Transcript

Along with lions and elephants, Southern Africa is home to a species of penguin. But the African penguin population is dwindling – and scientists are trying to turn things around for the bird. Ann Dornfeld reports:

Dyer Island sits just off the coast of the Western Cape of South Africa. It’s tiny, and pretty much consists of two things. Rocks. And birds.

Along with Cape cormorants, Hartlaub’s gulls and swift terns, Dyer Island is the nesting ground for hundreds of African penguins. Although they’re half the size of the Emperor penguins from that movie you might have seen, the species act a lot alike – waddling, awkwardly hopping, and squawking at each other over territory disputes. But today, these African penguins aren’t doing much of anything. That’s not them you hear. They’re mostly just standing still, trying to catch a breeze in the 90-degree heat.

“If you have a look here, you get an idea of just the heat stress of the birds. See this bird over here who’s just sort of standing, gasping, that’s an indication of heat stress.”

Lauren Waller monitors the penguin colony for Cape Nature. That’s the provincial conservation department. Waller says penguins used to find protection from the heat by burrowing into centuries’ worth of bird guano. That allowed them to keep cool, and lay their eggs out of predators’ reach. But in the 19th and 20th centuries, people dug out the guano between the rocks along the Southern Africa coast and sold it as fertilizer.

“And now what you’ve got if you have a look around the island is just – it’s rock, and the penguins can’t burrow into that. And so it now forces them to breed on the surface.”

When penguins make their nests out in the open, kelp gulls can snatch their eggs and chicks. And because penguins breed during African summers, the heat can be overwhelming. Parents often leave the nest just to cool off at sea, and their eggs or chicks die. It will take decades for the guano to build back up.

Scientists are trying to help the penguins out. They’re building nests for them. Waller says Dyer Island is the main testing ground.

“The nests are made out of fiberglass mold and they sort of mimic natural burrows that the bird would make in the ground. They’re kind of like a really small igloo shape, and big enough that you can fit two adult birds inside and their chicks as well.”

The nests are covered with rocks to prevent a greenhouse effect inside the igloos. Waller says they’re experimenting with different materials and nest arrays to see whether the penguins prefer their igloos in a cul-de-sac pattern, or a secluded ocean view. Some nests never catch on, but others have become prime real estate.

“Here you can see we have a colony of 15 nests, and already nine of them are occupied and it’s not their peak breeding yet. So this specific colony is looking really, really good.”

We peek inside one of the plastic igloos where a mother is guarding two fuzzy brown chicks.

“She’s turning her head from side to side.”

“Yeah, it’s a kind of aggressive, stay-away kind of behavior. But if you look behind her you can see the little heads sticking out!”

Waller says as successful as the artificial nests have been, commercial overfishing of sardines and anchovies also affects chick survival. At one well-protected nest a few yards away, she finds an abandoned egg and a dead chick. She says it may be that the parents couldn’t find enough fish.

“It is hard. Knowing their numbers are just going down every year. And you become quite desperate to do something so that these birds don’t have these breeding failures.”

The South African government has banned fishing around one island with penguin colonies to see whether it makes a difference in the birds’ survival rates. Waller says she’s hopeful that now is the turning point for African penguins.

For the Environment Report, I’m Ann Dornfeld.

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Interview: Keeping Alien Invaders Out

  • Asian Carp is one species that is very dangerous to the Great Lakes ecosystem (Photo courtesy of the US Fish and Wildlife Service)

Nature never made a connection between the nation’s big rivers and the Great Lakes. But Chicago did. A canal was dug connecting the Mississippi River system – including the Missouri, the Ohio and all their tributaries – to all of the Great Lakes at a point on Lake Michigan. It opened up commercial shipping to the interior of the nation.
But it also opened up both bodies of waters to aquatic life you don’t want traveling back and forth. Invasive species such as the zebra mussel have traveled from one to the other. Asian Carp have already caused havoc in the Mississippi. Some biologists worry the Asian Carp will destroy the four-billion dollar fishing industry in the Great Lakes if it gets in. There’s an electric barrier in place, but some people don’t think that’s enough.
Joel Brammeier is with the environmental group Alliance for the Great Lakes. His group is proposing a barrier that will separate the Mississippi system from the Great Lakes completely, to stop those invasive species. He talked with Lester Graham about the barrier:

Transcript

Nature never made a connection between the nation’s big rivers and the Great Lakes. But Chicago did. A canal was dug connecting the Mississippi River system – including the Missouri, the Ohio and all their tributaries – to all of the Great Lakes at a point on Lake Michigan. It opened up commercial shipping to the interior of the nation. But it also opened up both bodies of waters to aquatic life you don’t want traveling back and forth. Invasive species such as the zebra mussel have traveled from one to the other. Asian Carp have already caused havoc in the Mississippi. Some biologists worry the Asian Carp will destroy the four-billion dollar fishing industry in the Great Lakes if it gets in. There’s an electric barrier in place, but some people don’t think that’s enough. Joel Brammeier is with the environmental group Alliance for the Great Lakes. His group is proposing a barrier that will separate the Mississippi system from the Great Lakes completely, to stop those invasive species. He talked with Lester Graham about the barrier:

Joel Brammeier: Well, ecological separation means no species moving between
the Mississippi River and the Great Lakes. When you consider the problem of
invasive species, unlike chemical pollution, which you can reduce to a certain
safe level, there is no safe level of invasive species. Once two get in, they can
reproduce, and the damage is done, and there’s no going back. So, an
ecological separation means stopping fish, and eggs, and other critters from
moving back and forth between the two systems.

Lester Graham: How do you do that when there’s so much commercial traffic
and recreational boating, and just the water flowing through?

Brammeier: Well, in our research, we found that tech fixes – electrical barriers,
sound barriers, blowing bubbles through the water to try and deter fish from
moving – those things can reduce the risk. But for invasive species, risk
reduction really isn’t enough – you need 100% protection. And to do that, we’re
probably looking at some physical barrier that prevents water and live organisms
from moving between those two great watersheds.

Graham: I can imagine the commercial shippers are not thrilled about that.

Brammeier: Well, I think it remains to be seen. Nobody’s quite sure where the
best place is to put a barrier. We discussed about half a dozen different
scenarios under which you could implement that kind of separation. The
Chicago waterway system does support about 25 million tons, give or take, a
year of commercial commodity traffic – and that’s a significant amount. The
reality is that most of that cargo is internal to the Chicago waterways. So, there
isn’t a huge exchange of cargo between the Chicago waterway and the Great
Lakes. And that’s a good thing. That means we have opportunities to actually
split the system back to the way it historically was, and at the same time, solve
our invasive species problem.

Graham: Now, we can see how that would benefit the environment, but how
would it affect the economy?

Brammeier: Well, again, going back to this issue of commercial navigation. If we
create a separation in this system that has a minimal impact on most of the cargo
in the Chicago waterway, we’re really talking about potentially a very small
impact. And, frankly, there’s an opportunity here to create a benefit for
commodity movements as well. A lot of the cargo transfer facilities on the south
side of Chicago are outmoded, outdated, and not competitive. And, any
investment in this kind of project that changed that and also allowed cargo to
move more efficiently and created new port facilities, could have that kind of
benefit, besides protecting the Great Lakes from invasive species.

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