Tag: salmon

Part 1: Tidal Power in the Pacific

  • Research teams are looking for turbines that make tidal power work without harming sea life, like this one. (Photo courtesy of Charles Cooper with Oceana Energy)

For decades, people in the Pacific Northwest have relied on hydropower
for most of their electricity. But dams hurt salmon runs and river
ecosystems. That’s sent Washington utilities on a quest for new, cleaner
sources of power. As Ann Dornfeld reports, some are looking for new ways
to harness the power of flowing water:

Transcript

For decades, people in the Pacific Northwest have relied on hydropower
for most of their electricity. But dams hurt salmon runs and river
ecosystems. That’s sent Washington utilities on a quest for new, cleaner
sources of power. As Ann Dornfeld reports, some are looking for new ways
to harness the power of flowing water:


It’s a brilliant day outside. Craig Collar is perched on a rocky outcropping
overlooking rushing green water swirling and eddying below. Collar says
the water is moving so quickly because this is one of only two spots where
the Pacific Ocean flows into Puget Sound:


“As the tide comes in, it comes into this constrained passageway at
Deception Pass. Y’know, all that energy gets channeled, focused
through this very narrow area. So that’s what results in these rapid
tidal currents that we’re seeing right here.”


Collar researches new power sources for Snohomish County Public Utility
District. His goal is to use a sort of underwater windmill to convert some of
this water’s energy to electricity and funnel it onto the power grid. It’s called
“tidal power.”


Collar says there are dozens of underwater turbine designs to choose
from. Some look like a standard wind turbine with three big blades; others
look like a metal donut or a fish tail.


The Utility District is considering putting underwater turbine farms at half a
dozen locations around Puget Sound. It estimates tidal energy could power
at least 60,000 homes. Collar says the technology has a lot going for
it. It doesn’t emit carbon dioxide or other pollutants. He says underwater
turbines can be much smaller than wind turbines because they’re so
efficient:


“And that’s just as a result of the higher density of water. Water’s
roughly 800 times denser than air, so it contains a lot more energy.”


Unlike the wind, tides aren’t really affected by the season. You know the
saying: “predictable as the tides.” Collar says lunar phases let you forecast
the tides for decades into the future:


“Where with wind, you’re doing good if you can forecast hours or
even a little bit ahead. That really helps utilities like us integrate that
power into the power grid.”


Collar acknowledges there are a lot of questions about the impact of tidal
turbines on marine ecology.


These questions worry nearby Native American tribes. The Tulalip
reservation is close to Deception Pass, and they fish throughout Puget
Sound. Darryl Williams is the tribes’ environmental liaison:


“Five species of salmon, orca, grey whales, eagles, hawks, falcons…
y’know, we have numerous species of fish and marine mammals and
migratory birds that use the areas that are being proposed for these
turbines, and the studies really haven’t been done yet to show what
the impacts may or may not be.”


Along with the marine environment, Williams says the tribes are worried
that tidal turbines could scare away fish or get tangled in fishing nets.


“For the tribes, the fisheries aren’t only an economic source but
they’re also part of the tribes’ culture. Most of our cultural activities
are centered around salmon, and if we can’t catch the salmon, then
that part of our culture really goes away.”


A research team at the University of Washington is looking for ways to
make tidal power work without harming sea life. Brian Polagye is a
mechanical engineering graduate student whose focus is renewable
energy. His team is working with the oceanography department to look at
the ecological risks of tidal power. But Polagye says there are a lot of
misconceptions about what those risks are.


“The most obvious one is the question of ‘Oh! So you’re going to put
these rotors in the water and you’re gonna make sushi in addition to
electrical power.’ People view these turbines kind of as almost a
propeller that’s moving through the water so rapidly that if anything
gets near it it’s gonna get chopped to pieces. In practice, you can’t
actually run the rotors that fast. The maximum speed that the tip of
the rotor can turn at is about 25 miles an hour. Which is actually
relatively slow.”


Polagye says one of the biggest risks is that removing some of the energy
from the tidal currents will change the ecology downstream. He’s studying
how much power can be extracted from an estuary before it has a
noticeable effect on the ecosystem.


Back at Deception Pass, Craig Collar with the utility district says even if
there is a small ecological impact, it’s key to look at the overall picture:


“At the end of the day the thing that’s compelling about tidal energy
for us is there just aren’t very many opportunities for clean,
renewable, emission-free energy that’s both predictable and close to
the loads. And all those things are true for tidal energy in the Puget
Sound region, and there simply is no other renewable for which all
those things are true.”


The utility is working with the University of Washington to figure out
whether tidal power is viable in Puget Sound. If so, it could help reinvent
hydropower on the Pacific Coast for the next generation.


For the Environment Report, I’m Ann Dornfeld.

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Invasive Die-Off Stirs Fishery Debate

  • A naturally reproduced wild lake trout fingerling. (Photo courtesy of MI DNR.)

The fisheries in the Great Lakes are seeing dramatic changes. In one lake, an invasive species that has become part of the food chain has collapsed. But some native fish are doing better because of that collapse. Lester Graham reports some fishery managers are debating what to do next:

Transcript

The fisheries in the Great Lakes are seeing dramatic changes. In one lake, an invasive species that has become part of the food chain has collapsed. But, some native fish are doing better because of that collapse. Lester Graham reports some fishery managers are debating what to do next:


When we started digging canals, connecting the lakes to the Atlantic Ocean, things changed a lot for the fish in the Great Lakes.


First, the sea lamprey got into the lakes through the Welland canal that bypasses Niagara Falls.


The lamprey is an eel-like parasite that nearly wiped out the big fish in the Great Lakes by attaching to them and sucking the life out of them.

Also slipping through the canals was a smaller fish, the alewife. Since the lamprey wiped out most of the predator fish in the lakes, the alewife population exploded. They out-competed native fish for food. It got so bad, that by the mid 1960s, if you weighed all the fish in Lake Michigan, more than 80% of the weight would have been alewives.


So, once wildlife managers got the sea lamprey under control, they had to figure out what they could do to get alewives under control. The fish biologists decided to introduce new predators, trout and salmon, to prey on the alewives. These fish were not native to the Great Lakes. Expensive nurseries were built by federal and state game agencies to keep supplying new trout and salmon every year to prey on alewives.


Forty years later, in Lake Huron, the alewife population collapsed, and in Lake Michigan alewives are declining rapidly. Mission accomplished, right?


Well, in that 40 years, a whole recreational fishing industry has grown up around fishing for those introduced trout and salmon. Some fishery managers now say we have to find a balance of the right amount of alewives to sustain the introduced trout and salmon fishery. So, recently states have cut their trout and salmon stocking programs to give alewives a chance to recover.


Tom Trudeau [who] operates a fish nursery for the state of Illinois says it would cause trouble to try to take the Great Lakes back to native fish only.


“We do have this industry that we have pressure to keep. You know, you’re putting a lot of people out of business if you get rid of it.”


And Trudeau says because of ecological damage, many of the smaller native fish on which big predators used to feed have been wiped out.


“So, I mean, of the six or seven species in that category, we only have one. And a couple of them are extinct. So, I mean, we could talk about going back to the ideal situation of pure native species, but we’ve disrupted the habitat so much.”


So, the argument goes, the invasive alewives are now needed. But something unexpected happened when the alewives disappeared from Lake Huron. The native fish, walleye, yellow perch, and lake trout started doing better.


Dave Fielder is a fisheries research biologist with the Michigan Department of Natural Resources.


“We’ve long known that adult alewives were a predator and a competitor on newly hatched perch and walleye fry. We just didn’t realize how substantial that effect was until finally the adult alewives were removed from the system and now we’re enjoying some greatly increased reproductive success. Walleye, particularly in Saginaw bay, are at some of the highest levels that we’ve seen in a long time.”


But, after 40 years, people are used to fishing for those introduced trout and salmon. And some fisheries managers are wondering what will happen to all those expensive nurseries that provide their jobs.


What happens to all of those charter boat fishing operations, fishing tourism, if the government were to stop stocking those trout and salmon? Would they switch to fishing for native fish? And, can the native fish even survive in the long-run since so many of the smaller native prey-fish are no longer around?


Dave Fielder says it’s hard to say.


“So, we’re kind of in the middle of a change – it’s really a paradigm shift in many ways – and that’s always scary because nobody really knows how we’re going to end up, but I prefer to be optimistic. I think there are a lot of reasons to be hopeful in regards to the benefits that we’re seeing for our native species.”


But some fisheries managers say the debate of whether to go all native or to try to find the right mix of native and non-native fish is not over. Since invasive species, pollution, and habitat destruction have changed the Great Lakes so much, wildlife managers think they’ll still have to keep stocking one kind of fish or another to keep the recreational fishing industry going. If that’s the case, does it matter whether it’s native fish, or the introduced fish that anglers have grown to like so much?


For the Environment Report, this is Lester Graham.

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New Fish Virus Becoming Long-Term Threat?

Biologists are concerned a new fish virus may become an ongoing threat in the Great Lakes. The virus caused a fish die-off in Lake Ontario and the St. Lawrence River last month. The GLRC’s David Sommerstein reports:

Transcript

Biologists are concerned a new fish virus may become an ongoing threat in the Great Lakes.
The virus caused a fish die-off in Lake Ontario and the St. Lawrence River last month.
The GLRC’s David Sommerstein reports:


Viral Hemorrhagic Septicemia is common in saltwater fish in the Pacific Northwest,
but somehow the virus hopped into the freshwater fish of Lake St. Clair and Lake Ontario
last year. Then, last month, the virus killed hundreds of fish in the St. Lawrence River.
Scientists are trying to determine if the virus is a long-term threat to the Great Lakes
fishery:


“You know, that’s kind of the million dollar question.”


John Farrell directs the Thousand Islands Biological Station. He says many
fish species may become infected with the virus but not show symptoms:


“They may serve as a reservior for the virus. There’s a potential
that the virus could cycle over time, but may be with us for a long time to come.”


Conservation officials are most worried about muskies, trout and salmon – native
fish that anglers love to catch.


For the GLRC, I’m David Sommerstein.

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Dam Removal’s Balancing Act

  • The continued operation of hydroelectric dams will be up for debate in the next decade. Currently, the Army Corps of Engineers is looking to remove the Boardman River dam in northern Michigan. This dam removal could impact how all future dam removals are completed. (Photo courtesy of the Michigan Department of Natural Resources)

The Army Corps of Engineers is tackling a dam removal project that could affect how the Corps approaches future dam removals. In the next decade, communities will be deciding whether to keep operating tens of thousands of hydroelectric dams on rivers across the country. This project is significant because it involves several dams being taken out of production along the same stretch of river. The GLRC’s Bob Allen reports:

Transcript

The Army Corps of Engineers is tackling a dam removal project that
could affect how the Corps approaches future dam removals. In the next
decade, communities will be deciding whether to keep operating tens of
thousands of hydroelectric dams on rivers across the country. This
project is significant because it involves several dams being taken out of
production along the same stretch of river. The GLRC’s Bob Allen
reports:


(Sound of water)


The Boardman River is beautiful. It winds and turns and tumbles
through forested hillsides and passes along northern cedar swamps.
Sections of the upper river qualify as a blue ribbon trout stream, but a
series of dams along the lower half of the river changed some of the best
river water.


Steve Largent has worked on repairing damaged banks along the
Boardman for the last fifteen years. He says removing the dams will
restore faster flowing sections of the river, and clearing out the sand and
silt built up behind the dams will be good for trout and other critters.


“The sediment that is building up in the back of Brown Bridge pond
continues to move upstream as it fills in the upper end of the pond it’s
aggregrating upstream. It’s moving upstream further and further destroying
habitat further upstream.”


So a free running river will help wash away that sediment, but these days
it’s not just anglers who are interested in the Boardman River. Recently
river engineers have been drawn to the Boardman like trout to a fly
fisherman’s lure. They’re interested in landing the job of studying the
Boardman River and its dams. The million dollar study will look at
whether to keep or tear down three hydroelectric dams along a 17 mile stretch of river in northern Michigan just before it flows into Lake
Michigan.


Craig Fischenich is a research engineer with the Army Corps of
Engineers. He says the potential to remove three dams along the same
stretch of river is not something you’re going to find anywhere else.


“Whereas in many parts of the country they’re removing individual dams, they’re on systems that have other dams on them, and so this is an
opportunity here to actually try to restore an entire watershed.”


Fischenich says taking out the dams would mean improvements for
native fish. But there are risks too. If the dams go, invasive species
such as the parasitic sea lamprey could get upriver, and introduced
species such as steelhead and salmon could swim into the river and
compete with the native fish.


That prospect doesn’t exactly thrill John Wyrus, who lives on the
Boardman. He’d rather see some kind of obstacle down near the mouth
of the river to prevent introduced species from entering.


“So that these steelhead and salmon can’t get up the river. I would just
like to see it a brown trout and brook trout fishery.”


That’s the kind of scenario the study of the Boardman River would
consider.


(Sound of people talking)


Recently a lot of the engineers vying to do the study gathered at a
conference put together by the Corps of Engineers.


Gordon Ferguson works for ENSER Corporation. His company
is one of a dozen that submitted bids to land the study.


“This is a particularly interesting project because it involves a lot of
complex issues both from an engineering standpoint and also local
community issues. Property rights issues of homeowners along the
watershed.”


What they learn from the Boardman could be important to communities
near rivers across the nation.


Many of the tens of thousands of dams across the country are aging, and
in coming years, just like on the Boardman River, those with hydroelectric generating stations will need to be upgraded to keep their operating license.


The local utility says the dams on the Boardman don’t generate
enough power to make it worth fixing them. So they’re giving up the
licenses to generate electricity. Ownership of the dams reverts to the
local governments, and local officials are asking the Army Corps of
Engineers to pay for the study of the Boardman. The federal agency is
eager to be involved in this project.


The Boardman River study offers a chance for researchers to figure out
how to count less tangible values. Like how removing dams will affect
other wildlife such as eagles and osprey along the river.


Jock Coyngham is an ecologist for the Army Corps of Engineers.
Typically, he says, wildlife and recreation get discounted in this kind of
study because it’s easier to quantify things like hydropower, but it’s
important to figure out what value they have.


“If you make all your resource decisions as a state and as a country over
a long period of time pretty soon there won’t be any substantial fish
populations, any wild reproduction. Just because traditional cost-benefit
analysis tends to underestimate those ecosystem services and values, let
alone aesthetics.”


The Army Corps is waiting final approval for funding. Once given the
OK, the study of the Boardman River and its dams… could very well lay
the groundwork for other dam removals around the country.


For the GLRC, I’m Bob Allen.

Related Links

Ten Threats: Mercury and Health Problems

  • Fish advisories warn about possible mercury contamination, but many people aren't aware of the risks. (Photo by Lester Graham)

There’s no disputing that fish is healthful food, but too much of certain
kinds of fish can be dangerous, especially if you’re a woman planning to
have children. That’s because some fish contain elevated levels of
mercury. Mercury is a toxic contaminant that can cause neurological
damage. Julie Halpert filed this report about the harms mercury can
cause:

Transcript

We’re continuing our series ‘Ten Threats to the Great Lakes.’ One of the
threats identified by experts was air pollution that in turn pollutes the
lakes. The Great Lakes Radio Consortium’s Lester Graham is our guide
in this series. He says the next report looks at one pollutant that
eventually affects people.


There’s no disputing that fish is healthful food, but too much of certain
kinds of fish can be dangerous, especially if you’re a woman planning to
have children. That’s because some fish contain elevated levels of
mercury. Mercury is a toxic contaminant that can cause neurological
damage. Julie Halpert filed this report about the harms mercury can
cause:


Three years ago, when she was 18, Ayla Brown was healthy, but
suddenly, she started getting sick all the time. She was always tired, she
became anemic and had sore throats. Her tonsils had deteriorated so
much that they had to be removed. Her doctor couldn’t figure out why,
so he decided to test her for heavy metals poisoning.


The result? Ayla’s mercury levels were off the charts. They were five
times higher than the normal level. Her entire family was tested and
their levels also were above normal.


“The only conclusion we could come to is that in the past year or so since
we had moved to Ann Arbor, we had started eating a lot of fish and a lot
of fish that we now know is very known to be high in mercury, such as
swordfish and tuna and stuff like that.”


The Browns ate several meals of fish every week. Some of it was
ocean fish. Some of it was Great Lakes fish. After the diagnosis, they
cut fish out of their diet altogether. Within a year, the mercury levels
returned to normal.


“You are trying so hard to eat healthy and my family always was very
health conscious and so it’s so frustrating when you’ve done something
that you thought was good for you and realize that it was completely the
wrong thing.”


Fish are generally considered part of a healthy diet, but not all fish are
entirely safe. That’s because of mercury. Mercury exists naturally in the
environment at low levels, but higher amounts are getting into the food
chain.


Coal-burning power plants emit mercury, which eventually settles into
the Great Lakes. Then, aquatic microorganisms convert the substance
into methyl mercury, which is more toxic.


Those microorganisms form the base of the food chain. Small fish eat
microorganisms. Then, larger fish eat the smaller ones. As that happens,
the mercury concentrations escalate, making big large mouth fish like
trout, salmon and some walleye especially contaminated.


When people eat the fish, the mercury is passed on to them. Women of
childbearing age and their fetuses are most at risk.


Michael Carvan is with the University of Wisconsin-Milwaukee’s Great
Lakes Water Institute. He says the exposure isn’t just from the fish that
women eat while they’re pregnant. A woman can pass her entire lifetime
load of mercury to her baby. He says that 15% of all women of
childbearing age have high enough levels so that their fetuses will
contain mercury of one part per million or higher.


“Even at really low levels, around one part per million, you’re talking
about some subtle coordination difficulties, you’re talking about
problems with memory and problems with neuro-processing and IQ
deficits.”


Because of these concerns, the Environmental Protection Agency and
the Food and Drug Administration issued an advisory for women of
childbearing age and children, suggesting they eat fish and shellfish only
twice a week.


But one expert is concerned by all this talk about how mercury harms
people. John Dellinger was on a task force, which provided guidance on
fish consumption advisories. Dellinger studied people who lived on
Lake Superior who he thought would eat a lot of fish, but he found
something else.


“We basically discovered that from an epidemiologic point of view, these
populations have other things that are adversely affecting their health,
that in fact will probably overshadow anything we’re going to see from
the contaminants in their fish.”


Dellinger said the people were so concerned about contaminants in
fish, that they started relying on store-bought, processed food instead.
Those foods were higher in fat and sugar and contained other, less
healthful, ingredients. So, obesity and diabetes caused health problems,
not mercury poisoning, and Dellinger says that ended up being a worse
situation.


He says the key is to choose wisely, avoiding fish such as swordfish,
tuna steaks and the larger predator Great Lakes fish that are high in
mercury. That’s the only measure you can take right now, but that doesn’t
solve the problem. The real challenge will be to get rid of the mercury
that ends up contaminating the fish.


For the GLRC, I’m Julie Halpert.

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Salmon Stocking Cuts to Hurt Native Fish?

Several state agencies in the region will
reduce the amount of salmon stocked in Lakes Huron and Michigan next year. The change is designed to help the alewife population recover. Alewives are the salmon’s main food source, but as the Great Lakes Radio Consortium’s Peter Payette reports, some biologists think helping the alewife will hurt native fish:

Transcript

Several state agencies in the region (IL, IN, MI, WI) will reduce the amount
of salmon stocked in Lakes Huron and Michigan next year. The change is
designed to help the alewife population recover. Alewives are the salmon’s
main food source, but as the Great Lakes Radio Consortium’s Peter Payette
reports some biologists think helping the alewife will hurt native fish:


The total number of salmon stocked in the two lakes will be cut by more than
a third next year. The state agencies that manage the stocking programs say
there was widespread support for the decisions, but one dissenting voice was
the Chippewa Ottawa Resource Authority, or CORA.


CORA supports recovery of native fish species like the Lake trout. Mark
Ebener is a fishery Biologist with CORA. He says you can’t protect
alewives and expect lake trout to do well.


“So you have to commit to one or the other. Instead of what the states are
going to do, and what Michigan is going to do, it’s going to protect alewife
by reducing stocking so they can have healthier salmon, but at the same time
it’s going to say, ‘Well tribes we still want you to support Lake trout
rehabilitation and we still support it and think it’s still feasible.'”


Female lake trout that have a diet heavy in alewives can develop a nutrient
deficiency. It causes most of their young to die soon after birth.


For the GLRC, I’m Peter Payette.

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Ten Threats: The Beloved Invader

  • Because alewives are the main source of food for some sport fish, some people forget that they're an invasive species. (Photo courtesy of NOAA Fishery Service)

As we look at the “Ten Threats to the Great Lakes,” we’re spending some time examining the effects of the alien invasive species that have changed the Lakes. One of the first invasive species to arrive in the Great Lakes was the alewife; it’s native to the Atlantic Ocean. It has become the most beloved of all the invasives. That’s because it’s food for the most popular sport fish in the Great Lakes. But in the beginning, the sport fish was introduced to get rid of the alewives. Peter Payette reports:

Transcript

Today we’re continuing our series on Ten Threats to the Great Lakes. The Great Lakes Radio Consortium’s Lester Graham is our series guide:


As we look at the “Ten Threats to the Great Lakes,” we’re spending some time examining the effects of the alien invasive species that have changed the Lakes. One of the first invasive species to arrive in the Great Lakes was the alewife; it’s native to the Atlantic Ocean. It has become the most beloved of all the invasives. That’s because it’s food for the most popular sport fish in the Great Lakes. But in the beginning, the sport fish was introduced to get rid of the alewives. Peter Payette reports:


When autumn arrives in Northern Michigan, salmon fishermen line the rivers. The fish, native to the Pacific Ocean, swim upstream to spawn and then die. That’s why Tim Gloshen says they’re not interested in his bait.


“But if you irritate ’em enough and keep putting it in front of them, they’ll snap at it sometimes and you got to be ready when they hit it and set your hook.”


Anglers caught eight million pounds of salmon in Lake Michigan last year. Most of the fish are caught out in the lake.


“I got buddies that are catching couple hundred a year out there. They’re out there twice a week at least, all summer long, you know.”


Tim and his buddies and everyone else who fishes for salmon in the Great Lakes are at the top of the food chain. The money they spend on food, lodging, tackle, and boats figures heavily into decisions about how to manage the Lakes.


But it wasn’t always so.


Pacific salmon were stocked here about forty years ago to control the invading alewives. The native lake trout had just about been wiped out by overfishing and the sea lamprey. With no big predators left, the alewife population exploded.


At one point, it was estimated that for every ten pounds of fish in Lake Michigan, eight were alewives. Occasional die-offs would cause large numbers of alewives to wash up on beaches all over the Great Lakes. Historian Michael Chiarappa says all this was happening as America was feeling the urge to get back in touch with nature.


“And that’s when you get this rise in greater interest in sport fishing, recreational fishing, hunting. Teddy Roosevelt sort of epitomized the spirit of the strenuous life; get back out there and engage nature. It’s good for the soul, it’s good for the body, it’s good for the mind.”


So the salmon was brought in to control the alewife population and transform the Great Lakes into a sport fishing paradise. And it worked. But alewives remained the best food source for the ravenous salmon.


So now a healthy alewife population is seen as a good thing by the states that benefit economically from the recreational fishing. Mark Holey, with the U.S. Fish and Wildlife Service says this has caused people to forget alewives are an invasive species.


“If alewives were knocking on the door today, there may be a much different discussion about it. It may be more like the Asian carp.”


How the alewife would compare to Asian carp is unknown, because the Asian carp has been found in the Mississippi River, but not yet in the Great Lakes. What is known is that when alewives are abundant, native fish don’t do well. For example, Holey says biologists used to think PCBs caused many young lake trout to die. Now they know early mortality is mostly due to thiamin deficiency.
Thiamine is a vitamin lacking in lake trout that eat too many alewives.


“From the studies that we’ve been involved with, anywhere, right now, anywhere between thirty to fifty percent of the females that we take eggs from show some… their eggs show some signs of thiamine deficiency. Which means survival of those eggs are impaired.”


In some cases, none of the eggs will survive. So a worse case estimate would be half of the wild lake trout in the Great Lakes can’t reproduce because of alewives. This is why advocates for native fish species have been happy to see the alewife populations decline in recent years. They almost disappeared from Lake Huron.


Mark Ebener is a fisheries biologist for the Chippewa Ottawa Resource Authority. He says the government agencies that stock salmon and lake trout should stock more than ever to keep pressure on the alewife. Ebener thinks with alewife numbers down, there’s an opportunity to reestablish the native herring as the main prey fish in the Lakes, especially in Lake Huron.


“Saginaw Bay used to have a huge population of lake herring that’s essentially gone. They used to have a tremendous commercial fishery for it, and people used to come from miles around to buy herring there, and everybody in the lower end of the state used to have herring come fall and the springtime when the fishers were fishing, but they’re gone.”


This opportunity to bring herring back might not last much longer. The warm weather this past summer will probably help alewives rebound next year.


For the GLRC, I’m Peter Payette.

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Neighborhood Science Lessons for Teachers

Some teachers say today’s students know very little about where their food comes from, or why they should worry about the health of local fish and wildlife. And they say that makes subjects like biology and ecology boring. It also reduces students’ interest in protecting the environment. These teachers are finding a way to bring science home. The Great Lakes Radio Consortium’s Linda Stephan reports:

Transcript

Some teachers say today’s students know very little about where their food comes from, or why they should worry about the health of local fish and wildlife, and they say that makes subjects like biology and ecology boring. It also reduces students’ interest in protecting the environment. These teachers are finding a way to bring science home. The Great Lakes Radio Consortium’s Linda Stephan reports:


(waves)


In the Great Lakes region, home is never far from the water…


(teachers yelling to each other)


And these science teachers aren’t far from home either. They’re at the Lake Michigan shoreline pulling out a 150 foot net to catch fish. The teachers are getting an in-depth look at environmental issues near their homes in Michigan. And in return, they’ll weave those topics into their lessons this fall.


Today, their task is to catch a sample of fish, identify them by species, and to figure out whether those types of fish can survive in polluted waters. In the end, they’ll decide whether to let a hypothetical development group build a marina here. Michigan Department of Natural Resources biologist Todd Kalish built the scenario based on proposals he’s seen.


“This is a diagram of the proposed marina. They’re going to have to dredge about eighty cubic yards of sediment, and they’re also going to construct seawalls.”


Kalish says dredging will stir up sediment that can hurt some types of fish. Simply labeling fish will get some students’ attention, but Kalish says teachers can get more interest from more students by combining that lesson with his marina proposal. And it will also teach students how the environment is affected when we build things.


This training is the brainchild of Mary Whitmore, a curriculum developer. She’s using students’ local communities to inspire them to care about science, and she’s using science to inspire students to care about their communities. Whitmore’s setting up similar trainings in a lot of towns. She says investigating each community separately is a lot of work, but it’s necessary.


“My attitude has shifted completely from focusing solely on teachers – which I did for many, many years – to suddenly realizing that unless communities become meaningfully engaged with their schools, educating young people is going to become an increasingly difficult problem.”


Whitmore says that’s particularly true with life sciences. She says the subject’s ultimately about diagnosing and solving problems. And just talking about what some scientist has already figured out or simply labeling a fish misses the critical point for students. Who cares?


Whitmore says that’s especially true today when fresh water seems to come from bottles, instead of from a stream or a creek and produce at the grocery store rarely comes from a local farm. She says these days we’re not really connected with the environment that keeps us alive. But Whitmore says with the help of local environmental groups and other community partners, teachers can fit those lessons into the standard curriculum.


“As a high school teacher, I know I have to teach about, let’s say, ecology. And so, what I’m going to do is use water as a theme for my teaching about ecology. And I’m going to still be teaching the state standards and benchmarks in science. But I’m going to be doing it in a way that is much more meaningful for my students.”


Whitmore says teachers who attended her first training last year changed how they teach. They’re doing projects that mean something to students. One’s working with students to build rain gardens, others are raising salmon.


Teachers here today say it was already their goal to incorporate local issues in the classroom, but some say they couldn’t effectively teach on local issues because they didn’t understand those issues themselves. Christie Jenemabi Johnston teaches seventh through twelfth grade. She was impacted by a tour of the local wastewater treatment plant.


“Yes, I know how water treatment is done, and the essentials and the mechanics of it. But I never really took it to heart as far as what it meant in my immediate surroundings. And it just – it makes a big difference now.”


And she says knowing those things can help her students to get involved in their community. Of course in the end, if this model is to be truly successful it has to grab the attention of students, not just teachers. While the teachers were taking fish from the nets, a couple elementary-aged children were swimming nearby and they came over to see what was caught.


“Come on and look!”


“Wanna see ’em?”


“How big?”


“Oh, just little baby ones.”


“I don’t know are they all baby fish just because they’re little?”


If these kids are any indication of student response in the classroom, the programs just might work.


For the GLRC, I’m Linda Stephan.

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Alewife Die-Off Sparks Worries for Salmon

  • Because alewives make up a large portion of salmon diets, alewife die-offs are causing concerns that salmon populations might also decline. (Photo courtesy of the Fish and Wildlife Service)

A small fish is dying off in parts of the Great Lakes. According to the U.S. Geological Survey, the amount of alewives in Lake Michigan dropped nearly 70 percent last year. And biologists say the decrease might signal trouble for the salmon fishery. The Great Lakes Radio Consortium’s Peter Payette reports:

Transcript

A small fish is dying off in parts of the Great Lakes. According to the U-S
Geological Survey, the amount of alewives in Lake Michigan dropped nearly 70
percent last year. And biologists say the decrease might signal trouble for
the salmon fishery. The Great Lakes Radio Consortium’s Peter Payette
Reports:


Lake Michigan’s alewife population has been lower than it is now a few times
in the last 20 years. But Lake Huron’s alewife population is practically zero.


That’s why salmon in Huron are small and many are coming over to Lake
Michigan to feed.


USGS Biologist Charles Madenjian says the problem is stocked salmon are now
reproducing naturally.


And the growing numbers of salmon are eating up all the alewives.


“People fear that if alewives stay at this low level, the salmon are more
prone to disease and you’ll get a die-off.”


Neither salmon nor alewives are native to the Great Lakes.


Alewives swam in from the Atlantic Ocean through the Welland Canal. Salmon were introduced in part to control the alewife population.


For the GLRC, I’m Peter Payette in Traverse City.

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Mercury Rule’s Impact on Great Lakes Fish

The U.S. Environmental Protection Agency has a new rule to reduce mercury emissions from coal-burning power plants. But it might mean higher concentrations of mercury in fish in some inland lakes. The Great Lakes Radio Consortium’s Lester Graham reports:

Transcript

The U.S. Environmental Protections Agency has a new rule to reduce mercury
emissions from coal-burning power plants. But it might mean higher
concentrations of mercury in fish in some inland lakes. The Great Lakes
Radio Consortium’s Lester Graham reports:


The Bush administration’s EPA rule will use a cap and trade program to
reduce mercury. That means that overall mercury emissions will go down
over time, but some dirtier power plants can buy the rights to emit higher
levels of mercury. That could cause mercury hot spots. Higher levels of
mercury in nearby lakes would work up the food chain and concentrate
in fish. Mercury can cause neurological damage, especially to young
children. The toxin also can be passed on to fetuses.


Canadian studies last year already have shown higher levels of mercury in
people who regularly eat Great Lakes fish. The problem is expected to
become more severe in mercury hotspots.


Historically, walleye has had more mercury than some other types of fish in
the Great Lakes, but other large fish such trout and salmon, can also have
higher levels of mercury in their flesh.


For the GLRC, this is Lester Graham.

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