Tag: mike

The Invasion of the Quaggas

  • A close-up of the quagga mussel. Quaggas have spread in all of the Great Lakes except Lake Superior. (Photo courtesy of the Michigan Sea Grant Archives)

Whitefish is a main dish for everything from fish boils to fancy dinners all around the Great Lakes region. But in some areas of the Great Lakes, whitefish aren’t doing so well. Rebecca Williams reports on what’s happening to the fish many people love to eat:

Transcript

Whitefish is a main dish for everything from fish boils to fancy dinners all around the Great Lakes region. But in some areas of the Great Lakes, whitefish aren’t doing so well. Rebecca Williams reports on what’s happening to the fish many people love to eat:

(sound of knives getting sharpened and fish being filleted)

Mike Monahan sells fish from all over the world at his seafood market. But he says whitefish is a very popular seller.


“It’s been there forever, and everybody just expects it to be there, and it’s inexpensive. But really it’s a great fish, as far as a nice light delicate fish, I’d put it up against the soles and flounders.”


Monahan says he’s still getting good supplies of whitefish. So, for now, he’s happy.


But some of the people who catch whitefish are worried. Commercial fishers have been hauling in skinnier whitefish in some parts of the lakes. It’s taking whitefish longer to grow to a size worth selling. And in some cases, the fish aren’t fat enough to make a good fillet.


(sound of shorebirds)


Paul Jensen fishes for whitefish in Lake Michigan. He says lately, he’s had to move his boat to deeper waters. That’s because whitefish are hungry and they’re swimming out deeper. They aren’t finding their favorite food. It’s a little shrimp-like creature called Diporeia.


“Diporeia are probably like a Snickers bar to whitefish; they were high in fats, high in lipids and it was their main food – it was very nutritious for them and it affected their growth rate. Eating Diporeia a fish could reach maturity maybe in 18 months or 2 years. Now we’re looking at fish that may take 5 years to get there.”


Whitefish are not eating Diporeia because it’s vanishing. In some places, researchers used to find 10-thousand of the little critters in a square meter of sediment. Now there are very few, or none at all.


Tom Nalepa has been trying to figure out why. Nalepa is a biologist with the National Oceanic and Atmospheric Administration’s Great Lakes Environmental Research Lab.


“It’s a real scientific puzzle as to why Diporeia is declining. It’s definitely related to the spread of quagga mussels and zebra mussels but that exact negative relationship is kind of elusive at this point in time.”


But Nalepa says he’s sure the invasive mussels are to blame. The mussels got into the Lakes in the ballast tanks of foreign ships. And they’ve spread in all the lakes except Superior.


Tom Nalepa says he’s seen populations of Diporeia crash right around the time the mussels were booming. Nalepa says now, Diporeia’s gone from large areas in most of the Lakes.


That’s bad because Diporeia is an important food source for most of the fish in the Great Lakes.


But for whitefish it’s really crucial. Back in the good old days, Diporeia made up about 80% of their diet.


Tom Nalepa says whitefish are trying to find something else to eat. He’s seeing them switch to a snack food that could make them even skinnier.


They’re starting to eat quagga mussels.


“When whitefish feed on quagga mussels they have to deal with the shell which has no energy content at all and it has to pass the shells through its digestive system so basically the fish feels full when it’s not getting any energy source.”


Nalepa says to the fish, quagga mussels must seem like good food, because there are lots of them.


He says quagga mussels are booming, because they can live in harsher conditions than zebra mussels can. So biologists are predicting quaggas will be even worse for the lakes than zebra mussels.


“Where are things ultimately going to end up? People may just have to get used to fewer fish. Because basically now we’re trading the fish community for the mussel community. The lakes are loaded with mussels instead of fish now. It may be just the way it’s gonna be.”


Some fishermen are already seeing things change. One day last season, Paul Jensen pulled in some of his nets. He was expecting fish.


“It was kind of startling because the amount of quagga mussels that came up with those nets far exceeded the catch of fish. And we hadn’t really equipped the boat with a snow shovel to shovel quagga mussels out of the boat. The impacts are startling because you begin to wonder, if our little net caught these, how many are there and what are the impacts going to be down the road?”


Jensen says he wishes the invaders had never gotten into the lakes in the first place, because there’s no way to predict what effect they’ll have next.


But some scientists worry these changes at the bottom of the food chain will lead to a major collapse of the fish stocks that many people depend on.


For the Environment Report, I’m Rebecca Williams.

Related Links

Hydrogen Powers Family’s Car and Home

  • Mike Strizki demonstrates how a balloon filled with hydrogen can run a fuel cell and power an electric fan for about 45 minutes.

Many homeowners have reduced their fossil fuel consumption by placing solar panels on their rooftops. But one man has gone to a whole new level. He’s created a homemade power plant that runs on solar power and hydrogen fuel cells. Brad Linder reports:

Transcript

Many homeowners have reduced their fossil fuel consumption by placing solar panels on their rooftops. But one man has gone to a whole new level. He’s created a homemade power plant that runs on solar power and hydrogen fuel cells. Brad Linder reports:


Mike Strizki’s been tinkering with cars his whole life. Over time the 49-year old engineer became convinced that hydrogen fuel cell vehicles were the future of the auto industry. But during his 16 years with the New Jersey Department of Transportation, Strizki saw there was a problem with fuel cell cars: nobody was really building them.


“You had the auto makers and you had government pointing fingers. Well, you know, you build the fuel cell cars first and then we’ll provide the infrastructure. And they said, well you provide the infrastructure, and we’ll build the fuel cell cars. And I got tired of hearing that argument. And I said well, one way to solve the problem is to make your infrastructure your home.”


Five years and half a million dollars later, Strizki’s achieved his dream.


Here’s how it works. Strizki’s garage is covered with solar panels. They provide electricity for his house, and when there’s extra power, it’s routed to a device called an electrolizer, which breaks down water into hydrogen and oxygen.


During the summer, the hydrogen is stored in fuel tanks on Strizki’s property. And in the winter, he runs the hydrogen through a 6 kilowatt fuel cell to make energy. Strizki, his wife, and three children, are the first family in the country to live in a house powered entirely by hydrogen fuel cells and solar power.


And there’s another benefit: Strizki can fuel up his hydrogen fuel cell vehicles at a gas pump near his garage.


(Car accelerating sound on pavement)


“The fuel cells have enough to run the vehicle at about 50mph on fuel cells alone. If you’re going faster than that you’re sipping off the battery pack at a very low rate.”


Strizki helped design this car for Rutgers University 7 years ago. It’s been running ever since. Now that he has a fueling station at his home, he plans to convert his other car, a Toyota Prius, to run on hydrogen as well.


Strizki pulls up to the hydrogen fueling station – a series of converted propane tanks out by his garage. Opening his car’s trunk, Strizki connects a hose from those tanks to a smaller tank in the car.


“That’s how it refuels.”


Strizki’s system runs like a well oiled machine, only without the oil. But it wasn’t always so simple. When he first decided to build his home power plant, Strizki sought government approval from his home town of East Amwell New Jersey.


“I said all right, I’m doing this like anybody else who’s getting a building permit. I walked into the town and I said here, I want to build a solar hydrogen fuel cell home… and well, that… you know, the first place I went was the zoning officer, and he told me it’s an uncustomary use in a residential zone, and it’ll be a cold day in hell before I allow this.”


East Amwell Mayor Kurt Hoffman says the zoning officer was known as a stickler. The township had accidentally removed a line in a local zoning law allowing homeowners to use alternative energy.


“So we did an addendum to the zoning ordinance to allow alternative energy usages. These kinds of things, they have to be publicly noticed, you have to have public hearings. That brought out some people’s concern about hydrogen technology and the safety issue.


Hoffman says Strizki brought in a series of experts to testify that his house wasn’t going to blow up. The hydrogen was being stored at a safe pressure in the same type of tank normally used for propane.


Strizki says he’ll probably never make back the half-million dollars it costs to build his system. But he hopes to cut the costs by 90%, by mass producing and selling solar-hydrogen fuel cell systems to other homeowners. He says the future of the planet depends on renewable energy and not fossil fuels that have to be transported halfway across the world.


“At least the fact that I’m using the energy in the same place that I’ve created it, the energy is still zero carbon, and it’s still free, once you’ve paid for the equipment.


The Strizki’s don’t skimp on electricity. They have a big screen TV, a hot tub, and all modern appliances. And Strizki takes great pride in the fact that he can power everything, including his car, using renewable hydrogen power.


“There’s no shelf life, and that’s what powers the sun. When the sun stops shining, we’re all dead. So this is a much better solution than digging big holes in the ground, throwing sulfur up into the air. This is something that’s definitely sustainable. We just have to have the will to do it.”


For the Environment Report, I’m Brad Linder.

Related Links

Cloning Plant Species for the Future

  • Biologists plant cloned Monkshood starts. (Photo by Julie Grant)

Lots of people worry about the extinction of animal species, but plant conservationists say plants are even more threatened than animals. People are starting to go to great lengths to protect them.
There are banks set up to save seeds and large-scale efforts to educate people about threats to plants. Researchers, park biologists, and others have teamed up in one state to save a type of wildflower. Julie Grant
reports:

Transcript

Lots of people worry about the extinction of animal species. But plant conservationists
say plants are even more threatened than animals. People are starting to go to great
lengths to protect them. There are banks set up to save seeds and large-scale efforts to
educate people about threats to plants. Researchers, park biologists, and others have
teamed up in one state to save a type of wildflower. Julie Grant reports:


Biologist Mike Johnson is trying to walk carefully. He’s balancing a tray of plastic
containers while hiking down damp, sun-dappled cliffs. Each container holds a few starts
of northern monkshood. These wildflowers have only been found in four states.
Johnson is in Gorge Park, one of only three places in Ohio where monkshood have been
found:


“And, in Gorge Metropark they only exist in one area, and that makes them very
vulnerable to both natural and human induced impacts.”


People who walked the Gorge in the 1980s remember seeing thousands of the blue-
hooded wildflowers. But by 2000, there were only 13 of the plants left here. Johnson
says they were being killed by the salt used to melt ice and snow on a recently built
highway. People dug a ditch to divert melted salt that washed off the road. The monkshood have
done a little better since then. There’s now a stand with 190 of them, but
conservationists want to make sure this wildflower survives long term. Today Johnson is
planting new monkshood starts on the opposite side of the River, away from the
highway:


“So the goal is to establish satellite populations throughout the Gorge Metropark, so if
for some reason they were to die out in one area, they wouldn’t die out in the park
altogether.”


You might think that Johnson and other plant people could just collect seeds from the
surviving monkshood in order to grow new plants, but the director of conservation at
the Holden Arboretum says seeds aren’t reliable enough. They often don’t grow into
plants. Brian Parsons says that when the monkshood population started to decline, the
Arboretum started looking for new ways to preserve the plant’s genetic diversity:


“The only true way to capture that is to clone the plants, so we made the recommendation
to investigate cloning because scientific literature indicated that plant potentially had the
capacity to respond to that type of propogation.”


The Cincinnati Zoo plant research program specializes in plant cloning. So it cloned the
monkshood that Mike Johnson and another biologist are planting today.


Down in the gorge, they use a trowel to dig around in the rocky soil. They’re looking for
planting conditions that will give the monkshood the best chance to survive:


“Literally, that, over there is perfect. There’s not full sunlight. The trees above are
filtering out a lot of it. Just a little sunlight is getting down to the bottom and you’ve got
cool, clear springs. And even though we have all the surrounding development, there are
still springs in the gorge that are fairly uncontaminated from urban runoff and pollution.”


Water drips onto the biologists from the overhanging rock formations. They plant a
couple of monkshoods right in the crevices of the rocks. The leaves are reminiscent of a
buttercup. They are in the same family of plants. They’re not in bloom now. In the
spring, the delicate blue flowers remind some people of a religious hood. That’s how the
plant got its name.


Once Johnson puts these small monkshood starts in the soil, it’s hard to distinguish them
from the other ground-cover. That’s not a bad thing. Johnson says it’s best if people don’t
know exactly where to find the rare northern monkshood:


Grant: “You think people would poach them or something?”


Johnson: “Yeah. Yeah. It’s possible. We don’t generally try to advertise their location.
Anytime something’s rare, it’s valuable and somebody might want to take it.”


Plant specialists believe each plant species provides a purpose in nature, and might hold
some promise for pharmaceuticals or some other use. They’re just not sure yet what
people can learn from the northern monkshood. That’s why they want to make sure it
survives.


For the Environment Report, I’m Julie Grant.

Related Links

Mild Winter Thanks to El Nino?

The northern part of the U.S. might be in for a mild winter.
That’s if predictions by government climatologists turn out to be true.
Mark Brush explains:

Transcript

The northern part of the U.S. might be in for a mild winter. That’s if predictions by
government climatologists turn out to be true. Mark Brush explains:


Warmer ocean temperatures in the Pacific are expected to drive changes in wind and
weather patterns over North America this winter. This climate event is commonly known as El
Niño. It means milder temperatures for the northern part of the country, and for the
southern part it means wetter than average conditions.


Mike Halpert is the head of forecast operations at the Climate Prediction Center for the
National Oceanic and Atmospheric Administration. He says NOAA scientists were not
expecting El Niño effects this year, but recent warming trends in the Pacific Ocean
forced them to change their predictions:


“Right now it’s kind of hard to say how strong this event’s going to become. If the event
strengthens, as we anticipate it will, then I imagine the forecasts that we currently have,
which again favors warmth through much of the northern part of the country, will
remain.”


Halpert says the effects of El Niño will mostly be felt this winter and should subside by
next spring.


For the Environment Report, I’m Mark Brush.

Related Links

Cities Cope With Pesticide Pollution

  • Farmers are using fewer pesticides these days. (photo by Don Breneman)

Today, we continue our series on pollution in the heartland. Farm pollution is one of the biggest contamination problems in the country. But unlike other industries, there are very few pollution restrictions on agriculture. In the second story of our week-long series, the GLRC’s Lester Graham reports when cities clean up pollution from pesticides, the cost ends up on their citizens’ water bills:

Transcript

Today, we continue our series on pollution in the heartland. Farm pollution is one of the biggest
contamination problems in the country. But unlike other industries, there are very few pollution
restrictions on agriculture. In the second story of our week-long series, the GLRC’s Lester
Graham reports when cities clean up pollution from pesticides the cost ends up on their citizens’
water bills:


Every city in the Corn Belt that gets its water from surface supplies such as lakes and rivers has to
deal with pesticide contamination. For the most part, the pesticide levels are below federal
standards for safe drinking water. But water treatment plants have to test for the chemicals and
other pollutants that wash in from farm fields.


Some cities have had to build artificial wetlands or take other more expensive measures to help
reduce pollution such as nitrogen, phosphorous and pesticides.


Craig Cummings is the Water Director for the City of Bloomington, Illinois.


“Well, you know, it is an expense that, you know, we would rather not bear, obviously. We
don’t, you know, particularly like to pass that on to our customers. But, again, it’s understood
that we’re not going to have crystal clear, pristine waters here in the Midwest. But, that’s not to
say that we should stick our head in the sand and not work with the producers. At least here in
our little neck of the woods we think we have a great working relationship with the producers.”


Part of that working relationship is a liaison with the farmers.


Jim Rutheford has worked with farmers in the area on soil conservation issues for decades. He’s
showing me the artificial wetlands that the City of Bloomington is monitoring to see if it can help
reduce some of the contaminants that end up in the city’s water supply. The wetlands reduce
nitrogen runoff and filter out some of the pesticides such as atrazine that otherwise would end up
in Bloomington’s lake.


“The atrazine was used back several years ago in high concentrated amounts. Its effects were if
you get a flush of rain after your atrazine is put on, it comes into the lake.”


Rutherford says for a very long time atrazine has been popular with corn farmers.


“It’s the cheapest, but it’s also gives more problems as far as water quality is concerned.”


Because atrazine has been so popular, a lot of farmers use it and it’s polluted some lakes to the
point they exceeded safe drinking water standards.


In one test during spring applications of atrazine, National Oceanic and Atmospherica
Administration scientists found so much of the chemical had evaporated from Midwest farm
fields that rain in some parts of the East Coast had atrazine levels that exceeded safe drinking
water levels.


But atrazine levels have been going down. It’s not so much because of artificial wetlands or
because farmers are concerned about pesticide pollution, although some of them have expressed
concern. Atrazine has not been as much of a problem because more and more farmers are
switching to genetically modified crops such as Round-Up Ready soybeans and more recently
Round-Up Ready corn. The Monsanto seed is genetically altered so that the Monsanto pesticide,
Round-Up, can be applied to the fields and not hurt the crops. And Round-Up doesn’t cause the
kind of water pollution that atrazine does.


Mike Kelly is a farmer who’s concerned about reducing storm water runoff from farm fields.


“A lot of the herbicides that we’re using attack the plant, not the soil. For example, Round-Up
does not hang around in the soil. Now, I do still use atrazine. It does attach to soil particles. But
there’s where the advantage of no-till–the soil staying put in the field–as you said, we’re not
getting as much erosion, so it stays put and breaks down the way it’s supposed to.”


Kelly use a conservation tillage method that doesn’t plow up the soil the way traditional methods
do. That means less soil erosion so pesticides aren’t as likely to end up in waterways. And Kelly says low-till and no-till methods are beginning to get a hand from nature:


“Definitely conservation tillage and no-till is going to help keep herbicides in the field. Again, he
do see increased infiltration through better soil structure and also through earthworms coming
back, creating holes about the size of a pencil three to four feet deep in our soils. That is a nice
avenue for water to infiltrate rather than run off.”


And if more of the water percolates down into the soil, less of it is going to end up polluting
water supplies such as the City of Bloomington’s lake.


Water Director Craig Cummings says they city encourages voluntary efforts like Mike Kelly’s.
Cummings says the city depends on the farming community too much to point a finger, accusing
farmers of pollution.


“We recognize that we’re in the breadbasket of the world here. And we’re going to see with the
kind of agricultural practices that we have here in the Midwest or United States, we’re going to
see some of these contaminants.”


Cummings says it’s not a matter of eliminating pesticide contamination at the source, but
rather a matter of the city keeping levels low enough that the water is safe to drink.


For the GLRC, this is Lester Graham.

Related Links

Storing Nuke Waste Outside

Across the country, nuclear power plants are running out of room to store nuclear waste. The GLRC’s Brad Linder reports temporary storage at some plants is decades old:

Transcript

Across the country, nuclear power plants are running out of room to store
nuclear waste. The GLRC’s Brad Linder reports temporary storage at some
plants is decades old:


With no consensus on a plan to store the nation’s spent nuclear fuel in
one location, power plants are storing the waste onsite. For example, in
Limerick, Pennsylvania officials say they’re concerned about the plans to
build concrete casks to store nuclear waste outside a power plant. For
decades, they’ve been using storage pools inside the plant.


The proposed casks are described as temporary, but Assistant County
Planning Commissioner Mike Stokes says temporary storage at the plant
doesn’t mean much:


“They’ve been the permanent storage facility for every ounce of fuel used
at the power plant since it was first opened 20 years ago. So we can’t
always believe that things will be temporary.”


A spokesperson for Exelon Power, the owner of the Limerick plant and many others, says
the concrete casks are safe. Exelon says the casks are designed to withstand tornado-
force winds, or strikes from projectiles.


For the GLRC, I’m Brad Linder.

Related Links

Ethanol Fuel Stations to Double?

A bill being introduced in Congress could double the number of gas stations in the United States that sell E-85 ethanol fuel. The GLRC’s Erin Toner reports:

Transcript

A bill being introduced in Congress could double the number of gas stations in the United States
that sell E-85 ethanol fuel. The GLRC’s Erin Toner reports:


Congressman Mike Rogers of Michigan says the federal government should subsidize new
ethanol pumps at gas stations. Ethanol is made from corn or other kinds of plants. Rogers says it
would cost 20 million dollars to double the number of gas stations selling E-85; a blend of 85
percent ethanol and 15 percent gasoline:


“Our big three – General Motors, Ford and Chrysler – are building total almost a
million E-85 cars, so they’ve done their part. Now we need to do our part and get these
gas stations out across America selling E-85 gas.”


Rogers says the government should also boost subsidies for ethanol research to improve the
production process. He says if that happens, within five years, ethanol fuel could cost drivers
one dollar a gallon. But critics say taxpayers would be footing the actual cost of making ethanol.


For the GLRC, I’m Erin Toner.

Related Links

Feds Want Control of Food Labeling

A bill that would pre-empt states’ rights to label food is making its way through Congress. Most of the states’ Attorneys General have signed a petition opposing the law. The GLRC’s Lester Graham reports:

Transcript

A bill that would pre-empt states’ rights to label food is making its way
through Congress. Most of the states’ Attorneys General have signed a
petition opposing the law. The GLRC’s Lester Graham reports:


The sponsor, Michigan Republican Mike Rogers, says the National
Uniformity for Food Act is an appropriate extension of national
standards protecting food. But if it becomes law it will prohibit states
from telling people about chemicals or additives approved by the FDA,
but likely to be of concern when you buy your groceries.


For example, in California any food that contains chemicals known to
cause cancer or birth defects is required to carry a label saying so.


Another additive – recently approved by the FDA – is carbon monoxide
to help keep the meat looking red. Labels warning about that would not
be allowed under the proposal.


37 state attorneys general have signed a petition opposing the law, saying
the states should be allowed to warn against such chemicals. Opponents
say the bill puts special interests in the food industry before public’s right
to know what’s in their food.


For the GLRC, this is Lester Graham.

Related Links

Michigan Puts Cap on Water Withdrawals

In the Great Lakes region, Michigan is the last state to pass laws that protect the Lakes from large-scale withdrawals. The GLRC’s Mark Brush has more:

Transcript

In the Great Lakes region, Michigan is the last state to pass laws to
protect the Lakes from large-scale withdrawals. The GLRC’s Mark
Brush has more:


More than twenty years ago, the eight Great Lakes states pledged to
protect the Great Lakes from large scale water diversions. But until now,
Michigan officials never put a cap on how much water could be
withdrawn.


Mike Shriberg is the director of the Public Interest Research Group in
Michigan – an environmental advocacy group. He says it was especially
important for Michigan to pass these laws since the state is nearly
surrounded by the Lakes:


“Michigan needed to establish a precedent here saying we’re taking care
of our own water that we’re actually setting limits on who can use our
water, before we really had good standing in any regional debates over
diverting Great Lakes water as a whole.”


The new laws say any new businesses planning large scale water
withdrawals will need to get permits from the state. The laws will allow
bottled water to be shipped out of the region in containers as big as 5.7
gallons.


For the GLRC, I’m Mark Brush.

Related Links

Combating Inland Invasives

  • Eurasian Watermilfoil is one of the non-native species that has invaded inland lakes. (Photo courtesy of National Park Service)

Invasive plants, fish and other creatures are threatening many inland lakes. Environmentalists and property owners are trying to stop the spread…before the invaders dramatically alter the smaller bodies of water. The Great Lakes Radio Consortium’s Ann-Elise Henzl reports:

Transcript

Invasive plants, fish and other creatures are threatening many inland
lakes. Evironmentalists and property owners are trying to stop the
spread…before the invaders dramatically alter the smaller bodies of
water. The Great Lakes Radio Consortium’s Ann-Elise Henzl reports:


It’s strange to think that plants and animals from Europe, Asia and Africa
are living in small lakes in the Midwest. Boaters have taken invaders
there…after picking them up in the Great Lakes.


The big lakes are home to more than 160 aquatic invasive species,
including Eurasian Watermilfoil. The stringy plant grows in thick
clusters that get up to 12 feet tall.


“I have seen lakes where if you fell out of the boat in these massive
weeds and you weren’t wearing a life jacket, I don’t care how good a
swimmer you are, you would sink. You can not struggle your way
through these thick entanglements of weeds.”


Ted Ritter leads an effort to reduce aquatic invasive species…in
Wisconsin’s Vilas County.


(Sound of pontoon motor)


On one afternoon he takes his pontoon boat on a lake that had an
infestation of Eurasian Watermilfoil.


“It is a very aggressive plant and it has no natural predators to control its
growth, it grows up to two inches a day.”


When Eurasian Watermilfoil finds conditions it likes, it takes over
quickly. A piece as small as two inches can break off, and float away to
create a new plant.


Eurasian Watermilfoil is widespread in northern Michigan… northern
Wisconsin and other places. It’s one of dozens of aquatic invasive
species on the move in the region.


One of the worst invaders is zebra mussels. They can ravage a lake’s
ecosystem.


(Sound of motor boat)


So far, they’ve made it to just one lake in northern Wisconsin. Mike
Preul with the Lake Superior Chippewa scuba dives there, to count the
mussels. Three years ago, he found 7 adults per square meter. This year,
he counted more than 14-hundred:


“They’re still increasing. What they’ve seen in other systems is that just
like with any other exotic species they’ll come in, the population will
explode, they’ll kind of eat themselves out of house and home, and then
they’ll come down to a level and reach a steady state.”


No method has been discovered to get rid of zebra mussels, but there are
ways to control some invaders.


Herbicides can be used to kill Eurasian Watermilfoil, and some property
owners chip in to buy aquatic insects to kill the plants.


Les Schramm did that on his local lake:


“As the larvae hatches it burrows into the stem of the Eurasian
Watermilfoil and sort of eats out the center vascular part, and it falls over
and dies.”


People fighting aquatic invasive species say it’s like fighting weeds in a
garden — the work never stops and it can be expensive.


Ted Ritter of Vilas County says it costs thousands of dollars to treat a
lake once. So, often people do nothing.


Ritter says that can hurt the environment. He says it can also threaten the
economy, in areas like northern Wisconsin that rely on tourism.


Ritter says the invaders can reduce the appeal of a lake. He mentions a
plant called “curly leaf pondweed.” When it dies in the middle of
summer, it creates algae blooms that look like slimy green pillows:


“When people arrive at resorts and they look out and they see that very
unappealing lake they say ‘I’m not staying here,’ and they go somewhere
else. When realtors bring prospective buyers out to look at a property,
people get out of their car and they go right to the lake and they say ‘oh
my, I’m not even interested in looking at the house. This lake is
horrible.'”


Because it’s so difficult to control invasive species, Ritter and others
fighting the invaders focus on prevention.


Local volunteers and workers from the Wisconsin Department of Natural
Resources spend hours at boat landings. They urge people to clean their
boats, trailers, and fishing gear thoroughly when going from lake to lake,
that can keep unwanted plants and creatures from traveling along.


For the GLRC, I’m Ann-Elise Henzl.

Related Links