Tag: climate change

Seed Bank Hopes to Save Trees in Peril

  • Examples of ash tree seeds that are part of the collection effort. (Photo by Lester Graham)

People have been saving seeds for thousands of years. Gardeners save
seeds of their favorite plants. Governments save seeds to protect
their food crops. Now, some people are freezing the seeds from trees.
That’s because the trees are being destroyed by an insect pest.
Rebecca Williams reports they’re hoping a gene bank will protect the
trees’ DNA and some day help bring the trees back:

Transcript

People have been saving seeds for thousands of years. Gardeners save
seeds of their favorite plants. Governments save seeds to protect
their food crops. Now, some people are freezing the seeds from trees.
That’s because the trees are being destroyed by an insect pest.
Rebecca Williams reports they’re hoping a gene bank will protect the
trees’ DNA and some day help bring the trees back:


Seeds are a pretty amazing little package. They might be small, but
they’re tough. They can live through very dry and very cold
conditions.


(Sound of seed being shaken out of a paper bag)


These seeds are from ash trees. In some parts of the Upper Midwest and
Ontario, ash trees have been wiped out. The seeds are all that’s left.
That’s because of the emerald ash borer. It’s a tiny green beetle that
got into the US in cargo shipped from China. So far, the beetles have
killed 20 million ash trees. No one’s been able to stop the beetles
from spreading.


David Burgdorf works for a lab with the US Department of Agriculture.
He says people might not even know they had ash trees until the trees
got attacked:


“If your lawn was filled with the ash tree and you had all this great
shade and your energy bills were low, but now the ash tree’s gone, you
only miss it when it’s gone.”


Burgdorf says a lot of people love ash trees for their gold and purple
fall colors. They grow fast and hold up well under ice storms. Native
American tribes depend on black ash for making baskets and medicine.


David Burgdorf is trying to make sure ash trees won’t disappear completely
if the beetle spreads across the country. He’s gathering ash seeds
sent in by volunteers. He’s hoping to build a collection that
represents the entire ash tree gene pool:


“We want to try not to have to bring something back. We don’t want it
to be extinct. It’s important we at least save the seed so we can maybe cross
it, or do something, breed in resistance to the tree and have it
available to come back.”


Burgdorf says he thinks of the seeds as an investment for the future.
The seeds are definitely being treated like a precious commodity.
They’re sorted and they’re X-rayed to make sure the living embryos in
the seeds haven’t been damaged.


Then, the very best seeds in the bunch are off to a high security
government vault:


“We kind of joke that it’s the Fort Knox for seeds.”


Dave Ellis is the seed curator at the National Center for Genetic
Resources Preservation. It’s a giant seed bank. Ellis says the ash
seeds are dehydrated and frozen at 0 degrees Fahrenheit. These steps
put the seeds into a deep sleep:


“In a dehydrated state, degradation of DNA happens much more slowly,
over a course of tens of years or hundreds of years.”


Ellis says the ash seeds should be viable for at least 25 years, if not
longer. He says researchers might be able to use the stored genetic
material to breed new pest-resistant ash trees in the future. Ellis
sees gene banks as a safeguard against a world that’s changing fast.


Scientists say wild plants and crops we depend on will face many new
threats. Climate change might bring more drought.
Escalating global trade could mean importing more pests.


Deb McCullough studies insect pests at Michigan State University. She
says any time you import cargo, you’re running the risk of also
importing pests that can run up huge bills. She says in North America,
one of the big concerns is imports from China:


“If you look at the latitude where China occurs, if you look at the
northern and southern latitude and you overlay that on top of the US and
Canada, it matches up almost perfectly. So you can figure that pretty
much any kind of climate or habitat you find in China, there’s going to
be something similar in the US.”


McCullough says not everything that gets in will turn out to be a pest,
but she says as China’s huge trade surplus with the US grows, there’s a
greater risk more pests will come in.


She says there are some new regulations in place, but restricting
international shipping is a tricky proposition. McCullough says seed
collecting might be one way to preserve plants we rely on:


“People who are molecular biologists, the gene jockeys, have gotten
very good at enhancing or producing resistant varieties of different
kinds of plants. So, that may be something that becomes an option in the
future, maybe not the too distant future.”


McCullough points out there will be serious debate about introducing a
genetically modified tree into the wild. Some people don’t like the
idea of manipulating the genetic makeup of plants or animals.


There are a lot of questions about what might be done with the frozen
seeds, but the seed collectors say regardless, they need to bank up the
DNA of plants that we’re in danger of losing.


For the Environment Report, I’m Rebecca Williams.

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Tribes Take Climate Change to Washington

Some Native American tribes are starting to raise more concerns about climate change. Chuck Quirmbach reports:

Transcript

Some Native American tribes are starting to raise more concerns about climate change. Chuck Quirmbach reports:

About fifty tribes recently met with the National Wildlife Federation, for a conference on global climate change.


Paul Christel is fisheries biologist for the Lac Courtes Oreilles Band of Lake Superior Chippewa. He says the tribes are getting a better handle on how global warming is affecting tribal lands and waters. In colder climates, Christel says ice is arriving later and melting earlier, which can affect fishing seasons.


“You know, customs that have been carried on for thousands of years are all of a sudden shaken up. And it’s not a theoretical issue anymore. It’s hitting people in a very real, very physical way.”


Christel says he hopes Congress and the Bush Administation will take note of the greater tribal interest in slowing down climate change.


For the Environment Report, I’m Chuck Quirmbach.

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Saving Penguins in a Warmer World

While people are lining up to see animated penguins with “happy feet,” environmental groups are predicting some breeds of the bird will go extinct because of global warming. Lester Graham reports:

Transcript

While people are lining up to see animated penguins with “happy feet,” environmental groups are predicting some breeds of the bird will go extinct because of global warming. Lester Graham reports:


Penguins are popular these days. Last year people flocked to the theatre to see the documentary March of the Penguins. This year they’re laughing at penguins in the animated movie Happy Feet.


But the Center for Biological Diversity says the penguins are in serious danger. It’s calling for protections for the birds.


Kassie Siegel is Director of the Center’s Climate, Air and Energy Program. The group is petitioning the government to protect 12 breeds of penguins under the Endangered Species Act.


“And we believe if and when penguins are listed, just like polar bears that we’ve also petitioned for, that entities that are responsible for major sources of greenhouse gas emissions would have additional regulation to consider the impact of those emissions on listed species.”


Siegel says some of these penguins will go extinct in coming decades unless greenhouse gas pollution is brought under control within the next ten years.


For the Environment Report, this is Lester Graham.

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Bugs Boom as Climate Busts?

A new study suggests global warming could bring a boom in bug populations. Rebecca Williams reports that could mean bumper crops of pests:

Transcript

A new study suggests global warming could bring a boom in bug populations. Rebecca Williams reports that could mean bumper crops of pests:


Researchers studied 65 species of insects. They found that insects that are able to adapt to a warming climate will be able to reproduce a lot more quickly.


Melanie Frazier is the lead author of the study, published in the journal American Naturalist. Frazier says in the future, there could be more crop pests and other problems.


“There might also be human health consequences – a lot of bugs are disease carriers, like mosquitoes for instance. And if those populations are growing at a faster rate we might have more difficulty dealing with those.”


Frazier says at this point they can’t predict which species might experience population booms. And she says not all species would do well in a warmer world. Some species might migrate to cooler places, and others might go extinct.


For the Environment Report, I’m Rebecca Williams.

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Wetlands to Slow or Grow Global Warming?

  • John Pastor is trying to figure out how climate change will affect bogs and fens like this one. (Photo by Bob Kelleher)

In northern Minnesota, a researcher says wetlands like bogs could be key to how fast the climate changes worldwide. And the areas like the upper United States and Canada in the bull’s eye for rapidly changing temperatures and rainfall. The GLRC’s Bob Kelleher reports:

Transcript

In northern Minnesota, a researcher says wetlands like bogs could be key to how fast the
climate changes worldwide. And the areas like the upper United States and Canada in the
bull’s eye for rapidly changing temperatures and rainfall. The GLRC’s Bob Kelleher
has more:


What have wetlands, like fens and bogs, got to do with global warming? John Pastor says,
plenty.


Pastor is a professor and researcher with the Natural Resources Research Institute of the
University of Minnesota-Duluth. When Pastor straps on his hip waders, he goes where
almost no one else dares to go: into northern Minnesota’s fens, where water can be
several feet deep, and onto the bogs, where the mass of plant material is so thick it floats
on standing water.


A seven year-long study has revealed that fens and bogs can either help slow global
warming, or accelerate it. Pastor says all cards are off the table if temperatures keep
rising:


“The one problem in science that has the most ramifications throughout all of science – it’s
global warming.”


We’re in a swamp north of Duluth, Minnesota. Actually, it’s a fen, and it borders some
higher landscape nearby that’s a bog. What fens and bogs have in common is water and
peat, the not quite decomposed stuff left over when plants die. Pastor says peat lands are
one of the world’s significant bank accounts for carbon. They keep carbon out of the
atmosphere.


“Peat lands cover only 3% of the earth’s surface, but they contain 30% of all the carbon
that’s in all the soil in the world, locked in that partially decomposed organic matter, that
peat.”


Minnesota has vast peat lands that have been storing carbon for 10,000 years, but even
the size of Minnesota’s peat lands pales compared to those further north – around
Canada’s Hudson Bay, or in the Russian republics – all regions Pastor says that are facing
higher temperatures.


“All of the global climate models, one thing they all agree on, is that the greatest amount
of warming will occur in areas from Minnesota northward, and then inland – mid-
continent areas. So here we are. We’re sitting right now, right in the bullseye of the
greatest amount of warming that will happen on the face of the earth.”


This is the question: Will higher temperatures help trap more carbon in bogs, or force
more carbon into the atmosphere?


In this bog, Pastor’s been trying to figure out how warmer weather will affect bogs and
fens, and, in turn, what role the wetlands will play in global change. One thing he’s
found: the results depend largely on the water table, and that’s going to depend on
rainfall.


In some combinations, say with additional heat and additional rainfall, bogs could thrive,
trapping more carbon. That would be good. In other conditions, say with more heat but
less rainfall, bogs and fens could die and decompose, releasing even more carbon into the
atmosphere. That, Pastor says, would be bad:


“Now we have kind of a double whammy. Not only are we putting carbon dioxide from
fossil fuel into the atmosphere, the warning from that could cause the carbon from the
peat land also to go into the atmosphere and accelerate the warming.”


Predicting an outcome becomes mind numbing. Pastor’s working with new mathematical
theory to try to determine at what point global warming has gone too far.


“And so what seems to be happening is the temperatures of the earth have crossed some
kind of a threshold, where all the sudden, before that they crossed that threshold, the old
earth that we grew up with was stable. Now, it’s becoming very unstable, and ice sheets
are collapsing, birds and plants are migrating – everything’s happening very, very
quickly. And we’re going to enter into a new kind of earth that has a different kind of
stability – a different stable endpoint.”


Pastor says there’s no more complicated problem in all of science than global warming,
and no more important problem. Global warming, he says, changes everything, from the
forests to the wetlands. Pastor’s hoping the new mathematical models will provide more
definitive answers in time to do something about the outcome.


For the GLRC, I’m Bob Kelleher.

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Trees Under the Influence of Ozone and Co2

  • The circle of trees, as seen from the outside. The white pipe seen near the top delivers either normal air, one, or both of the experimental gasses to the trees. (Photo by Bob Kelleher)

In northern Wisconsin, they’re finding that gasses such as carbon dioxide and ozone will change the makeup of what survives in a future forest. An open air experiment called the Aspen FACE project has been testing trees in elevated levels of ozone and carbon dioxide for ten years. But they don’t know whether the forest can change as quickly as the climate does. The GLRC’s Bob Kelleher has more:

Transcript

In northern Wisconsin, they’re finding that gasses such as carbon dioxide and ozone will
change the makeup of what survives in a future forest. An open air experiment called the
Aspen FACE project has been testing trees in elevated levels of ozone and carbon dioxide
for ten years. But they don’t know whether the forest can change as quickly as the
climate does. The GLRC’s Bob Kelleher reports:


We’re standing inside a circle of trees: paper birch, aspen, and sugar maples, maybe 15
feet high. And they’re surrounded by a ring of large white pipes spraying the trees with
gasses – that’s the high pitched noise.


Among 12 different circles of trees, some get carbon dioxide, or ozone, or a
combination. These are the very gasses believed responsible for changing the climate –
they hold in the earth’s warmth, forcing surface temperatures higher.


Dave Karnosky, with Michigan Technological University, heads the Aspen FACE project,
near Rhinelander, Wisconsin. Karnosky’s trying to predict how these gasses will affect
the northern forest:


“Those species, with aspen and aspen mixed with birch and maple make up a huge
portion of our northern forests, and there was a lot of interest by industry as well as to
what’s going to happen in the future as these greenhouse gasses continue to build up in
the atmosphere.”


Even ten years ago, when this project started, it was clear that carbon dioxide and ozone
levels were on the increase.


Ozone is destructive. It’s bad for people and for plants. Carbon dioxide, on the other
hand, is what we exhale, and what green plants need to grow. Both gasses have been on
the increase, largely due to burning fossil fuels such as in coal-fired power plants and in
cars and trucks. Karnosky says he knew aspen were quite responsive to both CO2 and
ozone:


“We weren’t sure much about the interaction, but we were sure interested in what would
happen with that, because those two pollutants are both increasing at about the same rate
in the atmosphere.”


The Aspen FACE project has shown that most trees grow well when exposed to carbon
dioxide, and most do poorly in ozone. With the gasses combined, bad effects tend to
offset the good ones, but results vary greatly between the different kinds of trees, and
even within a single species of trees, like aspen.


Karnosky has found there’s a tremendous range of genetic variation even among the
relatively few trees they’ve tested. That variation makes clear predictions difficult:


“It’s very tough to make a single prediction for species or individuals within species,
there’s so much genetic variation. So that’s been one of the, I think, kind of the highlights
from what I see in terms of a bit of a surprise for us.”


That genetic variation could be the forest’s salvation. Karnosky thinks that if some
aspens, for example, die off from ozone, maybe others will do okay, and fill the forest
back in. Sugar maples, which seem more tolerant of ozone, could replace some aspen
and birch. Then, the mix of trees in the forest would change, but the forest would
survive.


But, there could be problems if the air changes the forest too quickly. Neil Nelson is a
plant physiologist with the US Forest Service. Nelson says the region’s paper and pulp
industries rely heavily on aspen trees. He’s uncertain how quickly the forest, and forest
industry, can respond if aspen begins to die off – and how long it might take for other
trees to grow in.


“One of my colleagues has said, you know, the key issue may be whether things change
too fast for our society and economy to adjust to, and I think that’s an open question.
There seems to be great plasticity, and we aren’t quite there in terms of predicting from a
forest management standpoint what these results mean.”


It takes time to grow trees, maybe too much time if the climate suddenly shifts. The
Aspen FACE project has already provided regulators preliminary data on ozone. It could
become the basis for future pollution law. But, even ten years into the Aspen Face
project, there’s still a lot more data to harvest among the aspen and hardwoods.


For The GLRC, I’m Bob Kelleher.

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Legal Challenges for State Air Pacts

States that are looking at regional agreements to reduce air pollution could face legal challenges. The Great Lakes Radio Consortium’s Chuck Quirmbach reports:

Transcript

States that are looking at regional agreements to reduce air pollution could face legal challenges.
The Great Lakes Radio Consortium’s Chuck Quirmbach reports:


Some states are upset with the pace of federal efforts to address climate change. So, they’re
considering teaming up on their own. For example, New York and some other eastern states plan
to begin a trading program in 2009, aimed at reducing carbon dioxide emissions that contribute to
global warming.


Robert Percival is an environmental law professor at the University of Maryland. He says the
regional efforts must proceed carefully.


“If the federal government fails to take action against a major problem there’s no problem letting
the states step in as long as they do so in a non-discriminatory way.”


In other words, the states can’t interfere with interstate commerce, by ruling against utilities or
other firms that produce products outside their regional collaboration. If the states do
discriminate, they’d need to get approval from Congress, and with Capitol Hill and the White
House currently on the same page on many issues, it isn’t clear federal lawmakers would back the
states.


For the GLRC, I’m Chuck Quirmbach.

Ten Threats: The American Eel

  • Researchers measuring an American Eel. (Courtesy of United States Department of Agriculture)

Pollution and invasive species are killing off or crowding out native plants and animals,
but for some species, it’s not just one problem, but many problems that are hurting them.
Few species illustrate the dangers of the multiple threats to the Great Lakes as the American
eel. Only fifty years ago, the snake-like fish accounted for half of the biomass in Lake
Ontario. Today, it has all but disappeared. David Sommerstein has that story:

Transcript

In our next report in the series Ten Threats to the Great Lakes we hear about native
species that are in trouble. Our guide in the series is Lester Graham. He says some fish
and organisms are disappearing.


Pollution and invasive species are killing off or crowding out native plants and animals,
but for some species, it’s not just one problem, but many problems that are hurting them.
Few species illustrate the dangers of the multiple threats to the Great Lakes as the American
eel. Only fifty years ago, the snake-like fish accounted for half of the biomass in Lake
Ontario. Today, it has all but disappeared. David Sommerstein has that story:


Before you say, who cares about a slimy critter like an eel, eels are amazing. They spawn
in the Sargasso Sea, the Bermuda Triangle, but no one’s ever caught them in the act.


After they’re born, they’re like tiny glassy leaves. They float thousands of miles north
and west on ocean currents. Then, they wiggle up the St. Lawrence River and into the
Great Lakes. They live up to 20 years in fresh water before they start the long journey to
the Sargasso to spawn.


The problem is their offspring are not coming back. People are worried about the eel, and
those who relied on it for a living feel like they’re disappearing too.


(Sound of waves)


Just ask fisherman John Rorabeck. He grew up here by the lighthouse on Point Traverse,
a peninsula that juts out into northeastern Lake Ontario.


Rorabeck’s been fishing these waters for more than 30 years. Eels were his prime catch.
He points past the lighthouse.


“I remember when I started fishing there were nights on that south shore, the most fish
that would be eels at certain times and there was literally tons of them on that south
shore. Now, you could go back there and you’ll find nothing.”


Rorabeck stopped fishing eels several years ago because it just wasn’t worth it. Now he
dedicates his fishing time to science. He catches specimens for leading eel expert John
Casselman, who examines them in his lab.


“It is truly a crisis. A crisis of concern.”


Casselman’s a scientist at Queens University in Kingston, Ontario. In 1980, at a point on
the St. Lawrence River in mid-summer, he counted more than 25,000 eels a day. Now
there are as few as 20 a day.


Casselman ticks off a list of causes. It sounds like a who’s who of environmental threats
to the Great Lakes – over fishing, dammed up rivers, erosion, pollution, invasive species,
climate change. If scientists could sift out how all the factors relate, they could take a big
step in better understanding the Great Lakes delicate ecosystem.


The problem is, Casselman says, there’s no time to wait. In 2003, eel experts from 18
countries made an unusual statement. In what they called the Quebec Declaration of
Concern, they urged more action, not more science.


“I’m a research scientist, and of course I love data. At this point, you don’t want me.
Don’t ask me to explain what’s going on here because by the time I get it figured out, it
may be too late.”


People are starting to do something about it, Casselman says. Several U.S. agencies are
considering giving the eel “rare and endangered” status. More money is going toward
research for fish ladders over dams.


Marc Gaden is spokesman for the Great Lakes Fishery Commission.


“We’re committing ourselves, our resources to working to make the recovery of the
species a reality.”


The province of Ontario has closed the eel fishery in its waters for the foreseeable future.


(Sound up at beach)


Fisherman John Rorabeck supports that plan. He stares out across the waters he’s
trawled for decades. He says he’s behind anything to bring the eel back for future
generations.


“And hopefully we can, but I don’t expect to see it in my time. When I…[crying]…when I
think of all the times that we’ve had out in the lake and my forefathers and see what’s
happening here, it breaks you down.”


Rorabeck says when he thinks of the eel nearing extinction, he feels like he and his way
of life are becoming extinct too.


For the GLRC, I’m David Sommerstein.

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Scientists Alarmed Over Eel Disappearance

Scientists are sounding the alarm about what they call a catastrophic decline of the American Eel in the Great Lakes. They say the eel’s fate is a warning sign of overall climate change. The Great Lakes Radio Consortium’s David Sommerstein reports:

Transcript

Scientists are sounding the alarm about what they call a catastrophic decline of the American Eel
in the Great Lakes. They say the eel’s fate is a warning sign of overall climate change. The Great
Lakes Radio Consortium’s David Sommerstein reports:


John Casselman is a researcher with the Ontario Ministry of Natural Resources. He says
American Eels used to be to Lake Ontario and the St. Lawrence River what salmon is to the
Northwest.


“Inshore eels represented half of the total weight of fish inshore, so they were massively abundant
and the Onondaga of the Iroquois Confederacy actually had an eel clan.”


Today there’s only about one eel for every 10 acres in Lake Ontario. The eel spawns in the
Sargasso Sea and migrates into the Great Lakes. While commercial fishing, pollution, and dams
have contributed to the eel’s dramatic decline, Casselman says oceanic climate change may be a
culprit.


“And if we’re not concerned about it, or trying to do something about it, it is at our peril. Maybe
the loss of this eel resource is telling us something that’s a lot bigger and that I think we should be
paying a lot more attention to.”


Concerned scientists and the Great Lakes Fishery Commission have issued emergency
declarations urging the U.S. and Canada to take immediate action.


For the Great Lakes Radio Consortium, I’m David Sommerstein.

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Ice Coverage Greater on Great Lakes

During the past several years, ice coverage on the Lakes has been below normal. Now, for the second year in a row…ice coverage is up:

Transcript

During the past several years, there’s not been as much ice on the Great Lakes. For the second
year in a row, there’s a lot more. The Great Lakes Radio Consortium’s Lester Graham reports:


With a colder winter this year, the Great Lakes are seeing more ice coverage. Ray Assel is a
physical scientist with the Great Lakes Environmental Research Lab. He outlines what he sees on
ice charts from the National Ice Center.


“Ice cover extent similar to the 30-year median ice cover. So, it’s really not that unusual.”


Last year also saw closer to average ice on the Great Lakes. But it seemed extraordinary because
of several mild winters before.


“I think what makes people think it may be unusual is because of the five winters previous to this
last winter, we’ve had below normal ice cover.”


Assel says for those who are looking for clues to global warming, year-to-year changes can vary
widely. Global warming has to be measured in decades.


For the Great Lakes Radio Consortium, this is Lester Graham.

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