Tag: invader

Tiny Pest Threatens the Las Vegas Lights

  • Hoover Dam's backside stretches more than 700 feet from top to bottom, but the dam's seeing trouble from the tiny aquatic zebra mussel. (Photo by Shawn Allee)

Hoover Dam generates some of the power that lights Las Vegas all night long. But there’s something
that’s making that job a bit more difficult. Shawn Allee found out, it’s a tiny aquatic pest:

Transcript

Hoover Dam generates some of the power that lights Las Vegas all night long. But there’s something
that’s making that job a bit more difficult. Shawn Allee found out, it’s a tiny aquatic pest:

The usual tour of Hoover Dam starts at the visitor’s center – way at the top.

Robert Walsh works with the federal agency that runs Hoover.

He says, go ahead – look over the edge.

Allee: “OK. That’s creepy. Seriously, that’s creepy.”

Walsh: “It’s spooky. Are you afraid of heights?”

Allee: “No, they don’t bother me at all.”

The dam stretches down 700 feet, and it holds an enormous reservoir – Lake Mead.

This tour is awesome, but Walsh says there’s another tour, too.

It’s, um, NOT so awesome.

It’s all about the trouble the tiny quagga mussel is causing Hoover and other nearby dams.

To get that tour, Walsh takes me to Leonard Willet.

Allee: “Where are we right now?”

Willet: “It’s kind of a work station where all the quagga mussel control activities take place
for Hoover Dam.”

Allee: “It’s quagga mussel central for this area?”

Willet: “Exactly.”

Willet first heard quagga mussels were growing in the nearby Lake Mead reservoir in 2007.

He called an expert for advice.

“First thing out of her mouth was, ‘I’m sorry to hear that.’ I knew it was a lot more serious.
And I asked her what we’re in for.”

Willet learned quickly enough – quagga mussels attach to nearly anything underwater.

He shows me a sandal that was in water – and is smothered in them.

They’re like clams the size of your pinky fingernail.

“We went from zero to THAT in seven months.”

And that’s the problem.

Hoover Dam uses water from Lake Mead to spin generators.

The water moves around in pipes – and quagga mussels can attach to them – just like on that sandal.

Allee: “What does that mean in a real practical sense?”

Willet: “Our intake towers would close off. Once you start closing off, you can’t spin the
generators. That’s just kind of the big view of it.”

Zero power generation.

That’s the worst-case scenario. It hasn’t happened – but it’s a fight to prevent it.

“Now, we’re going to go down to the third floor, which is the generator floor.”

The generators are inside broad metal cylinders.

Big water pipes turn the generators. Smaller ones cool them off.

“Well, we circulate cold water from those pipes. If those start to plug up with mussels, then
you can’t keep a generator cool, if those … it shuts down due to overheating.”

Right now, it takes a lot of scraping to keep everything clear.

All this effort’s adding up – Willet says he’ll spend 2 million dollars soon on new equipment.

Even with that, Willet is still a bit jittery about some pipes outside, at the very bottom of the dam.

“The one that’s probably the scariest of all is, we have a fireline that runs around here.
Mussels love it. Then, your firelines, when they’re needed, are plugged with mussels. So
that’s another area you have to really be careful of, safety-wise.”

This didn’t have to happen.

Quagga mussels invaded eastern rivers and the Great Lakes first.

Experts figure the mussels hitched a ride West on someone’s fishing boat.

Apparently – someone didn’t clean their boat properly – and mussels dropped into Lake Mead.

Allee: “When they built this amazing structure during the Depression, do you think they had
any idea that something like this could ever happen?”

Willet: “I think there was a lot of disagreement among professionals that a little mussel the
size of your finger nail could impact a large hydro facility, but we’re quickly learning a bunch
of them can impact water and power delivery.”

Willet says if boaters aren’t careful – they’ll spread quagga mussels to the Pacific Northwest, where
there’re lots of dams and hydro power plants.

After all, if it can happen at mighty Hoover Dam – it could happen anywhere.

For The Environment Report, I’m Shawn Allee.

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Interview: Book Blames Coast Guard for Invaders

  • Ships sometimes bring unwanted travelers with them (Photo by Lester Graham)

Invasive species hitchike on foreign cargo ships and end up in US waterways. Lester Graham talked with the author of a new book about why the government has done so little to stop these aquatic invaders that are damaging the environment:

Transcript

Invasive species hitchike on foreign cargo ships and end up in US waterways.
Lester Graham talked with the author of a new book about why the government has done so little to stop these aquatic invaders that are damaging the environment:

Lester Graham: “Maybe you’ve heard about Zebra Mussels. The thumbnail-sized mussels have invaded freshwater lakes, rivers, clogged water intake pipes, and damaged the environment across a good portion of the US – and they’re still spreading. The Zebra Mussel is just one of dozens and dozens of invasive species brought into the US by foreign cargo ships entering the Great Lakes though the St. Lawrence Seaway, which connects the Atlantic Ocean to the Great Lakes. What happens is ships in Europe or Africa or Asia take on ballast water, sucking up millions of gallons of water from a foreign port. Aquatic life is sucked up with it. Then, as the ships take on cargo in the Great Lakes, the ballast water is discharged, and with it things like Zebra Mussels and other foreign pests. Many of those species have spread from the Great Lakes into the Mississippi River system, and then transported by recreational boating in every direction from there. Jeff Alexander has written a book that chronicles not only those invasions, but the utter failure of the government to do anything effective to stop these introductions. Jeff, you make the argument that these invasive species, biological pollution if you will, amount to a more serious environmental disaster than the Exxon-Valdez oil spill in Alaska. How’s that?”

Jeff Alexander: “Well the Valdez, there’s no discounting the severity of the Valdez oil spill. But oil spills, over time, can be cleaned up to a certain extent, and the ecosystem can recover. In the Great Lakes, ocean freighters have brought in 57 species, they’ve caused billions of dollars in damage, and they’ve transformed the entire ecosystem.”

Graham: “There are eight states that border the Great Lakes, and members of Congress are aware of this problem, why haven’t they taken action to ensure this problem is dealt with once and for all?”

Alexander: “The shipping lobby has been very effective at keeping regulations at bay, the Coast Guard, which is the lead agency in the US, has just totally dropped the ball on this issue. They’re the ones who’re supposed to be the guardians of the Great Lakes when it comes to ships, and the Coast Guard is very close to the shipping industry. They have social events together every year. A lot of people blame the shipping industry for this problem, but I tend not to. They certainly have fought the regulations but, in the end, the reason that we have regulatory agencies is to protect public health and the environment. And our regulatory agencies haven’t done the job, and our politicians haven’t done the job – no one seems to have the backbone to stand up to the shipping industry and deal with this problem.”

Graham: “Are the foreign ships that bring in this cargo and take away grain or the other things from the Midwest so economically valuable that it is worth this economic and environmental cost?”

Alexander: “There is some debate on that, but the best economic study estimated if we kept these ocean freighters out of the Great Lakes, made them offload their cargo in Montreal and put it on trains and trucks, it would cost us an extra $55 million a year to move that cargo. That’s compared to the estimate of $200 million a year that foreign species are costing us in terms of economic and environmental damage. It’s not a stretch to make the case that the environmental and economic costs have far exceeded the economic benefits.”

Graham: “Jeff Alexander’s new book is ‘Pandora’s Locks: The Opening of the Great Lakes St. Lawrence Seaway’. Thanks, Jeff.”

Alexander: “Thank you.”

Jeff Alexander spoke with The Environment Report’s Lester Graham.

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Kudzunol

  • Kudzu grows wild. (Photo courtesy USDA)

If you’ve ever lived in the south, or even just gone for a visit, you
know kudzu. It’s an invasive weed that grows like crazy in the southern states. Rebecca Williams reports on a new use for the weed:

Transcript

If you’ve ever lived in the south, or even just gone for a visit, you
know kudzu. It’s an invasive weed that grows like crazy in the southern states. Rebecca Williams reports on a new use for the weed:


Kudzu grows about a foot a day.


“And it covers trees, fences, houses – it’ll cover you if you stand still too long.”


That’s Doug Mizell. He says he can run everything from cars to lawnmowers on his kudzunol. It’s a fuel-grade ethanol made from kudzu. He says he got sick of fighting kudzu and decided to figure out how to use it.


“And I thought well, I’m just gonna sit down and make myself a tabletop still and see if I can’t extract some sugars from this stuff and see if I can make some moonshine. And sure enough I was able to do that and the idea of kudzunol kinda grew from that.”


He says kudzunol smells like gin. Right now he’s working on getting patents – and money – to build a commercial plant to make it. He says with those things in place… he’s hoping to sell kudzunol as soon as six months from now.


For the Environment Report, I’m Rebecca Williams.

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Beetle Threatens Anishinabe’s Ash Trees

  • Emerald Ash borer is a type of beetle that is threatening black ash trees. (Photo courtesy of USFS)

American Indians have been making baskets from the wood
of black ash trees for hundreds of years. Now, they see that tradition threatened by a beetle. The emerald ash borer has killed millions of ash trees in Lower Michigan over the past few years, and Indian basket makers are preparing for the day when their grandchildren may no longer find black ash. The Great Lakes Radio Consortium’s Bob Allen
reports:

Transcript

American Indians have been making baskets from the wood of black ash trees
for hundreds of years. Now, they see that tradition threatened by a beetle. The
emerald ash borer has killed millions of ash trees in Lower Michigan over the
past few years, and Indian basket makers are preparing for the day when their
grandchildren may no longer find black ash. The Great Lakes Radio
Consortium’s Bob Allen reports:


(Sound of museum)


The Anishinabe believe the black ash tree is a gift to their people, and they say
its carried them through many hard times. The story of the baskets is part of a
display in the Ziibiwing Center at the Saginaw Chippewa Reservation in
central Michigan.


Judy Pamp is assistant director of the Center, and she remembers how
important baskets were when she was growing up.


“If we ate it was because there were baskets to sell or trade, and it went from
that being the thing that sustained us to where now it’s more of a an art and a rare art,
and that you do in limited quantities.”


Pamp comes from a long line of basket makers, and she’d like to pass on the
skills to her granddaughter, but she says the baskets aren’t the most
important thing… rather it’s a sense of connection among the generations.


“You know the whole family pulling together, the whole community pulling
together to help one another out… that everybody was important and
everybody had their role.”


Some family members may be good at one part of the basket making, and
there’s plenty of work to divvy up. First, there’s going into a swamp to find a
black ash tree, cut it down and haul it out.


(Sound of pounding)


Then, there’s peeling off the bark, and pounding the wood into strips, called
splints, for baskets. All that can take 25 hours of hand labor. Then, it’s
another 6 or 8 hours to weave a basket. Without the trees, basket makers worry
they may lose that closeness of working together.


The emerald ash borer isn’t on tribal lands yet, but it’s in
two neighboring counties. Scientists say it’s only a matter of time before the
beetle invades the reservation and wipes out the ash tree. The invasive pest got
to the U.S. in cargo shipped from Asia. Despite quarantines the bug continues to
spread because people move infested firewood, timber or landscape trees.


Deb McCullough is an entomologist at Michigan State University. She
concedes ash trees in Lower Michigan are goners.


“Took me a while to get my mind around that. You know we’re going to see
somewhere probably in the neighborhood of four hundred million ash trees in the forests
of lower Michigan that eventually are going to succumb to emerald ash borer
unless something really amazing happens in the next few years.”


McCullough says they’re looking for a way to help trees resist the insect, or a
predator to keep it in check, but it might be years before a solution is found.
So, the tribes are looking at their own ways to deal with the ash borer.


(Sound of splint pulling)


One idea is to harvest a whole bunch of black ash splints for baskets and freeze
them to use later. That would keep basket making going for a while.


(Sound of basket maker)


Another plan is to collect and save seeds from black ash trees.


Basket maker Renee Dillard says someday maybe trees can be replanted from
seed, but she says that means forty or fifty years before any wood is
harvestable, and she doesn’t think she’ll be around then to teach her
grandchildren how to choose the right tree and pound out the splints.


(Sound of pounding)


“As a people, we’re pretty resilient and we can adapt to change. It’s just that we’re
losing an important part of that whole black ash process, and I don’t want my great
grandchildren to just make baskets. They need to understand the whole process because
it’s done carefully and prayerfully.”


Dillard follows the old ways. She lays down tobacco as an offering of thanks for the tree,
and she believes this calls her ancestors to witness her use of the gift.


The Anishinabe don’t know why the emerald ash borer is taking their trees at
this time, but their tradition teaches for every hardship there will be an answer
and something to balance the loss.


For the GLRC, I’m Bob Allen.

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