Sadie Babits - The Environment Report

Saving Salmon From Sea Lions

Bobby Begay has been patrolling the Columbia River below Bonneville Dam for the past three years, hazing sea lions. (Photo by Sadie Babits)
Robin Brown is a marine mammal researcher for the Oregon Department of Fish and Wildlife. (Photo by Sadie Babits)
Bobby Begay and his crew on board the Columbia River Inter-Tribal Fish Commission boat. (Photo by Sadie Babits)

The Columbia River in the Pacific Northwest historically has been a super highway for salmon. But dams, development, and pollution have taken their toll on salmon. The fish have declined to the point that several species are endangered. Now the salmon face another threat, sea lions. As Sadie Babits reports wildlife managers are trying to get rid of the sea lions to protect the salmon:

Transcript

Bobby Begay steers his small boat up the Columbia River. He knows this river, and he
knows the salmon. His ties to the salmon go back generations.

As a member of the Yakima Tribe, he comes out here to tribal fishing sites to catch
salmon. It’s something Indians along the Columbia River have been doing for thousands
of years. He says the salmon are considered sacred food.

“It’s part of our livelihood. It’s part of our health and well being.”

They use the salmon to feed everyone from the tribal elders to the children. Tribal
fishermen tell stories of seeing so many salmon in the Columbia River that you could
walk across their backs. Those days are gone.

A series of dams on the river make it hard for fish to get from the Pacific Ocean to fresh
water and back again. The salmon have fallen victim to over-fishing, agricultural
pollution, and habitat destruction. Pacific salmon are now listed as endangered. And they
face yet another threat on the Columbia River – sea lions.

“Sea lions have probably always been in the Columbia but not to this extent and have
done damage to salmon populations like it has and all of it is due because of a man-made
structure, which is Bonneville Dam.”

Sea lion numbers have exploded along the Pacific Coast. And more than a thousand of
them travel up the Columbia River looking for food. Some of them have figured out that
if they gather at the base of Bonneville Dam, they can easily catch salmon that are trying
to pass by.

Biologists estimate that every year sea lions eat some 13,000 salmon. This year, the
federal government gave state wildlife agencies in Oregon, Washington and Idaho, the go
ahead to kill up to 85 sea lions.

Begay won’t really talk about whether he thinks this is right. He’s torn.

“Well, ah, sea lion is a spiritual animal not only to us but to coastal tribes and we respect
the animal as it is, but also the salmon is a scared food to us as Columbia River Indians.”

So Begay works to protect the salmon without killing the sea lions. He works for the
Columbia River Inter-Tribal Fish Commission.

That’s why he’s out here in this boat. He patrols the river most days using fireworks to
scare sea lions away from the salmon.

Crew: “There he is 1 o’clock, 50 yards.”

(sound of gun shots and boat)

Begay’s crew shoots firecrackers over the sea lion.

“And hopefully we’ll get them into the main stem of the river and start hazing them down
stream.”

“The hazing really is not highly effective. The animals are really quick to learn.”

Robin Brown is a marine mammal researcher for the Oregon Department of Fish and
Wildlife.

Brown says they’ve euthanized seven sea lions this year. He says the decision to kill a sea
lion is made after everything else has failed.

“We have to have observed them killing salmon and steelhead, and they have to have
been exposed to all the non-lethal methods of harassment that you’ve observed here
today and shown that that isn’t detouring them from being here and feeding.”

The Humane Society opposes killing the sea lions. It’s asked the courts to put a stop to it.
While this legal battle plays out, Bobby Begay will keep hazing the sea lions until the end
of May.

That’s when the sea lions leave the dam and head back down the Columbia River to the
Pacific Coast to breed.

For The Environment Report, I’m Sadie Babits.

Citizen Scientists Track Climate Change

Reporter Sadie Babits is tracking the blooming of a lilac tree, as part of a "citizen scientist" project that will document climate change. (Photo courtesy of Wikimedia Commons)

Scientists are asking citizens to pay attention to plants this spring. They want you to report everything from leaf buds to blossoms. Scientists want those observations from right in your backyard to better understand how climate change is affecting plants and trees. Sadie Babits liked the idea and signed up:

Transcript

You know, I found it really isn’t hard to be a citizen scientist.

I’m on the website for Project Budburst. It’s a nationwide effort to get people out into their backyards to track spring flowers. All I have to do is to pick a plant or tree to keep an eye on and then report my findings.

I’m thinking I’ll check out the lilac trees in my neighborhood here in Portland. But before I head out, I need some advice.

So I called Sandra Henderson. She’s busy these days directing Project Budburst at the University Corporation of Atmospheric Research.

“Hey Sadie.”

I reach Henderson at her office in Boulder, Colorado.

What advice do you have for me, a first citizen scientists observing phenology?

“The ideal thing to do is get a sense of when lilacs in your case in Portland, Oregon are expected to have different pheno events.”

Good thing I looked up phenology before calling Henderson. Basically it means nature’s calendar – the timing of when cherry blossoms bloom or a robin builds a nest.

And these life cycles of plants and animals are sensitive to changes in climate.

“Plants provide a wonderful context for understanding changes to the environment and they certainly respond to changes in temperature and precipitation, things that climate scientists are very interested in.”

Scientists can’t be in everyone’s backyard. That’s where volunteers come in. Last year some five thousand people across the country reported their observations to Project Budburst. That information now is the foundation for an online database that includes everything from dandelions to ponderosa pines.

So after walking through our neighborhood and seeing a lot of trees that have already flowered, I’ve decided that these lilac trees outside of our house are perfect for watching because they haven’t flowered yet and there are leaf buds all over the branches. And here’s a branch and the leaf buds are huge and they are just starting to unfurl.

Now that I’ve found my lilac tree to watch, I can report today’s findings.

Really that’s it. Scientists are finding out a lot of interesting things. For example, forsythia in Chicago are blooming a week earlier. These simple observations will eventually create a snapshot of how climate change is affecting plants across the U.S.

For The Environment Report, I’m Sadie Babits.

Money Back for Water Bottles

Nationally, we go through more than 30 billion non-carbonated drinks every year (Photo by Lester Graham)

Most states don’t have bottle deposit laws to encourage people to return their empties. Only eleven states do. Now, some are expanding their recycling programs to include bottled water. Sadie Babits reports the states know requiring a deposit for the bottles will keep them from ending up in landfills:

Transcript

Every time Mary Nemmers buys a bottled beverage, she’s pays a five cent deposit at the register.

She wants to get that money back eventually. So she saves up her bottles and once a month brings them here to New Seasons Market in Portland, Oregon.

(sound of bottles being sorted)

Nemmers thinks this is a pretty convenient system. She gets to shop while a store employee sorts and hand counts her bottles.

Today Nemmers is getting nine dollars and change for her empties. While she’s glad to get that money back, she’s excited to learn that Oregon’s bottle deposit program has expanded.

“I just got some news that they’ll take back all the cans for deposits. Not just the ones that they sell. That started in January and that saves me an extra trip.”

That’s only part of the change. People in Oregon now also get five cents for every water and flavored water bottle they return to stores. That ends up being a lot of bottles.

Nationally, we go through more than 30 billion non-carbonated drinks every year. And that number is growing. Most of them end up in a landfill.

For Heather Schmidt, it makes sense to require a deposit for these bottles. She runs the sustainability program at New Seasons.

“We’re getting more back from our customers and that’s a good thing (chuckles). And we know that there’s quite a bit of water purchased, you know, and we’re selling it we want to take it back.”

Out of the eleven states that have bottle deposit programs, Oregon is one of the first to include bottles for water and other non-carbonated drinks.

Maine includes just about every beverage bottle. Connecticut adds bottled water to its program in April. New York and Massachusetts are debating similar expansions.

Mary Nemmers says it was about time that her state recognize that something needed to be done to make sure water bottles stay out of landfills.

“Because I do a lot of walking and I’ve seen lots and lots of water bottles thrown around and in trash cans. I assume that the expansion will reduce that and I’d like to see Oregon stay on the cutting edge of recycling.”

Not everyone is thrilled.

I spoke with the president of the Northwest Grocery Alliance who told me stores want recycling off their property.

A spokesman for the major food outlet Winco said the same thing. Stores say it’s messy to deal with “garbage” and stores have to dedicate staff time to recycling.

Heather Schmidt says at New Seasons Market, they don’t mind.

“Operationally, because we’ve increased the volume, it does mean we’ve had to add some staff labor to that to process but it’s something that we’re committed to.”

While most of the bottles are hand counted at New Seasons Market stores, large chain grocery stores use reverse vending machines.

I can stick a redeemable bottle into the machine. The machine checks to make sure it’s the right kind of bottle. Once it’s accepted, the bottle gets crushed and I get my five cents. Those crushed bottles, along with the plastic ones, end up here.

(sound of recycling plant)

We’re inside a glass and plastic bottle recycling plant. It’s a labyrinth of conveyer belts and equipment. The last drops of stale beer and old soda pop in the bottles make it smell sort of like your gym shoes meet the town dump.

Sadie: “Can we check out where the plastic bottles go?”

John: “Yes, We’ll go back this way.”

That’s John Anderson. He’s the President of the Oregon Beverage Recycling Cooperative.

“Now, the plastic, we have seen an increase, but we’re only two months into this expansion at this point and it’s a slower time of year for water and flavored water.”

We stop in front of three bales of recycled plastic that remind me of massive hay bales.

I can pick out the water bottles scrunched together with a lot of soda bottles. These plastic bales will be sold to manufacturers – mostly overseas – who will turn this plastic back into something useable.

Anderson says all of the glass though, stays local and gets turned back into beer bottles.

Bottle deposits work.

The states that have bottle deposit laws have dramatically high bottle recycling rates – as high as Michigan’s 97%.

But the U.S. average is below 40%. The rest of those bottles spend forever in a landfill.

For The Environment Report, I’m Sadie Babits.

Communities Welcome Wilderness

Eric Fernandez of Oregon Wild says wild areas still allow for a lot of activity - "just leave your chainsaws and bulldozers at home." (Photo by Sadie Babits)
A view of Bonnie Butte in Oregon. This area is one of the proposed places to be designated as wilderness. (Photo by Sadie Babits)
Another view of Oregon's Mount Hood. (Photo by Sadie Babits)

More than two million acres in nine states could soon become permanent wilderness. Congress is expected to vote on the plan today. Sadie Babits recently visited one of the sites, Mount Hood in Oregon:

Transcript

A steady stream of traffic runs through the small town of Sandy, Oregon every day.

It’s known as the “Gateway to Mount Hood.”

This used to be a town of lumberjacks. The timber industry was king here.

And a wilderness designation means no logging.

“It wasn’t that long ago that this was a mill town so for the city council unanimously support wilderness is an interesting thing.”

That’s Scott Lazenby. He’s the town’s city manager. He says in the past a wilderness proposal would end up in a Paul Bunyan sized tussle.

But Lazenby says the city council saw real benefits to having wilderness in Sandy’s backyard.

“We do have a watershed that our city water comes from. It’s important to protect that and part of that watershed would be protected by the wilderness bill.”

Not only that. Lazenby says these days, it’s not timber – it’s tourism that brings money to Sandy.

“Even though the number of people who can go into wilderness is relatively limited, the presence of wilderness is a very positive thing.”

Under a massive bundle of bills now before Congress, 127,000 acres surrounding Mount Hood would become wilderness along with other sites across the nation.

“Right now we’re standing in White River Canyon and in the winter this is a really popular place for cross country skiing, snow showing.”

That’s Eric Fernandez. He’s the wilderness coordinator for Oregon Wild – a conservation group out of Portland.

He says a wilderness designation still leaves a place open to all kinds of activities hunting fishing camping.

“You just have to leave your chainsaw and bulldozer at home.”

Fernandez says, yes, this entire area will mean clean drinking water, and wildlife protection.

“But in this instance, the reason I’m so excited about protecting this area of White River Canyon as wilderness is because it has the world’s best sledding habitat.”

Yep, he said sledding – like tobogganing. There’s nobody sledding today.

But, we did bump into Jeff McKnown, who’s out skiing.

“It’s great to come here on the weekday when no one is here.”

McKnown says he loves the trees and the snow so bright it hurts your eyes.
He’s been escaping to White River canyon when he can for the last fifteen years.

“You know when you have a wife and five kids these moments are pretty precious.”

The law that makes wilderness designations possible has been around since 1964. There are more than 700 wilderness areas in 44 states.

But Oregon has lagged behind. Even conservative Idaho has more wilderness than the more progressive Oregon.

Mike Matz thinks that could change. He leads the ‘Campaign for America’s Wilderness’. It’s been pushing for the new wilderness designations before Congress.

“It’s really become amazingly so a motherhood and apple pie issue. This is something that Republicans and Democrats alike have gotten strongly behind.”

And from Oregon’s Mount Hood, to rolling hills in West Virginia, from red rock country in southern Utah, to sand dunes along the Great Lakes – it looks like Congress will preserve two million acres more as wilderness.

For The Environment Report, I’m Sadie Babits.

Lead Bullets and Hunters’ Meat

Condors are harmed by eating meat contaminated with lead from hunters' bullets (Photo courtesy of the US Fish and Wildlife Service)

Hunters have been using lead
bullets for decades to kill game with
little, if any, side effects. But new
research finds that hunters may need
to use more caution when choosing their
bullets. Reporter Sadie Babits has this
story on a hidden danger that’s just
coming to light:

Transcript

Tony Hanson has been hunting wild game all of his life. And over the years, he’s
grown pretty attached to what he considers the most cost effective, most efficient
bullet around – a lead bullet.

“It matters a lot to a hunter. You are counting on the range of that bullet. You know
what the bullet can do and you know what the gun will do. You’re out there to take
an animals life, and that’s not something we take lightly.”

The typical bullet used by most hunters is made up of about 65% lead. The bullet is
capped off with a copper jacket. These bullets are designed to handle high speeds and
to kill an animal quickly without breaking apart and sending tiny lead fragments
throughout the meat. Hanson works with the country’s largest conservation group –
Michigan United Conservation Clubs. He says he’s not concerned about possible
lead poisoning.

“Generally speaking, if you make the shot you are supposed to make you’re not
getting any edible meat. It’s not something that really weighs into my thought too
much. ”

Like Hansen, most hunters don’t give lead bullets a second thought. So why worry?

Well, early last spring, food pantries across North Dakota and Minnesota were
advised not to give out donated ground venison. That’s after lab tests revealed tiny
lead fragments in some of the meat.

It generated enough interest that North Dakota launched a study involving some 700
people. The Centers for Disease Control and Prevention worked with North
Dakota’s Health Department. They found that people who ate a lot of wild game
tended to have higher lead levels in their blood than those who ate very little or no
wild game.

The results validated similar research involving California Condors. The Condors
almost went extinct in large part because of lead poisoning. You see, the birds would
feed on gut piles and carcasses left by hunters, and, if those hunters used lead bullets,
the condors would get sick.

That old problem still exists. Lead poisoning remains the number one obstacle
standing in the way of restoring the California Condors.

(sound of birds outdoors)

Rick Watson is the vice president of the Peregrine Fund in Boise, Idaho. He says
they’ve tracked the birds through satellites to see what they feed on. They’ve also
shot deer in the same way a hunter would, using typical lead bullets. The animals
were then x-rayed.

“And we were astounded by the results. Typically out of the 30 or so deer all of them
had fragmented lead bullets in them. And we were also amazed about the actual
extent the lead fragments are sprayed throughout the meat.”

Watson says about 5% of a bullet does break apart and some of it gets into the meat.
He’s now working on another study to see the impact of lead bullets on people.
That’s involved shooting more deer, sending the meat to random processors, and
then running that meat through an x-ray machine. The findings, he says support
what North Dakota discovered late last fall.

“And again what we found that 30% of the packages of meat that came back had at
least one fragment of lead in them.”

Not enough to make a person sick, but enough to raise a red flag. Watson says the
solution is simple. Hunters need to use non-toxic lead bullets. But most hunters
aren’t convinced. So-called green bullets are about twice the cost of lead bullets and
hunters don’t believe they are as efficient.

Hunters say they want independent research done before anybody starts making the
switch to non toxic bullets.

For The Environment Report, I’m Sadie Babits.

Lead Poisoning and California Condors

Adult California Condor in flight (Photo courtesy of the US Fish and Wildlife Service)

It’s been decades, but there are now more California Condors in the wild than there
are in captivity. That’s thanks to two condor chicks who recently left their nests in
the Grand Canyon. As Sadie Babits reports, biologists are thrilled, but one of the
problems that caused the decline in condors still exists:

Transcript

At the World Center for Birds of Prey in Boise, Idaho, there’s a wood fence that
protects the California Condors that live behind it.

“Just lately in order to minimize the exposure of our adult breeding pairs to humans,
we’ve built this security fence or actually it’s a visual barrier, we call it.”

That’s Bill Heinrich. He overseas the California Condor Recovery program at the
Center.

There is this one small break in the fence – a part that hasn’t been built yet. And
behind some chain link, I can see some very large birds…

Sadie: “Is that a Condor right there??”

Bill: “Yeah… you can see an adult condor standing, a pair of them on a perch.”

Sadie: “Ooohhhh!”

Bill: “You can kind of get an idea of just how big they really are.

Sadie: “They’re huge!”

Bill: “They weigh anywhere from 18-25 pounds and have close to a 10 foot wingspan.”

In the early 1980s the California Condors almost went the way of the Dodo –
extinct. Only 22 of these birds remained in the wild.

The big birds were killed by hunters. They died from lead poisoning after eating
animals killed with lead bullets. And their own genetic makeup didn’t help much
either.

These birds, shall we say, have a low sex drive. Rather than produce chicks every
year and gamble that they’ll survive, condors lay one egg every other year. That
hasn’t worked so well.

So biologists thought they’d help. They started capturing the endangered condors to
begin a captive breeding program. In 1987, the last wild bird was caught.

Bill Heinrich recalls there was plenty of controversy over that decision.

“People thought well you should let them go extinct with dignity or you can try to
breed them in captivity but you might fail and then you would have lost them in the
wild that much quicker.”

But the move saved the birds from being killed by hunters or from eventual lead
poisoning.

And, the breeding program, well, let’s just say the numbers speak for themselves.
Down to 22 birds in 1987, today there are now 327 California Condors. And more
than half of those birds are back in the wild.

Bill Heinrich says next spring some of these condors will be released some where
around the Grand Canyon in Arizona.

That’s where the birds will once again be exposed to one of the factors that lead to
their decline. It’s not hunters these days. The birds are protected by the Endangered
Species Act. But lead poisoning. Condors feed on gut piles and carcasses left by
hunters. If a hunter uses lead bullets, the bullet will explode sending tiny fragments
of lead through the meat. It’s enough to make a condor sick. Heinrich says lead
poisoning remains the single biggest threat to the birds.

“You know if hadn’t been for the lead issue coming up, I would have thought, I
didn’t have any reservations about it being successful until the lead problem cropped
up.”

Every year, biologists have to test the birds for lead poisoning. They’ve been working
with the Arizona Game and Fish Department to hand out free non-lead bullets to
hunters in the area. Last year, not a single condor died from lead poisoning. This
year, biologists have had to treat six birds, all of which are expected to make a full
recovery.

In California, the state has banned lead ammunition because of the lead poisoning
concern. But hunters don’t think lead bullets are a real problem, and they really
don’t want to pay for different kinds of bullets because that is a lot more expensive.

For The Environment Report, I’m Sadie Babits.

Orphaned Bear Cubs Find Refuge

Sally Maughan and her assistant John Knight (Photo by Sadie Babits)
The bears' enclosure (Photo by Sadie Babits)
A shy bear cub (Photo by Sadie Babits)

Many state wildlife agencies can’t
or won’t take in injured or abandoned
critters. They rely on a lot of volunteers
to do the job. One woman in Idaho has made
it her life’s work to give orphaned bear
cubs throughout the West a second chance.
Sadie Babits brings us this profile:

Transcript

Sally Maughan used to be known as the “squirrel lady.” As a wildlife
rehabilitator, she took in weasels, foxes, raccoons and a lot of
squirrels.

She had no intention of working with bears until one day the
Idaho Fish and Game Department called.

“And they kept calling because nobody else had an enclosure that could hold a bear.”

Maughan named that first bear cub Ruggles. That was twenty
years ago.

So far, she’s helped 189 orphaned bear cubs from around the
West. She runs a non-profit in Boise called the Idaho Black Bear
Rehabilitation Program.

(sound of outdoors and cars passing)

It’s a chilly afternoon but it’s sunny. So Maughan, her helper John Knight
and I sit outside on her front steps. It’s hard to ignore the smell as
we talk. You know that musty smell of animals and straw and well, bears. It’s kind of an
animal barnyard smell out here.

This place used to be surrounded
by pasture. Not any more. On one side there’s an upscale subdivision.
And on the other side, there’s another large subdivision. Maughan says
her neighbors don’t mind the bears and sometimes she’ll let them come
visit.

“We don’t want bears seeing people any more than they need to.
John just comes in and feeds and comes back out. And I do the bottle
feeding which is when they really attach so once they are weaned he
pretty much takes over from there.”

(sound of gate opening)

Sadie: “So who’s that?”

John: “That is one of the Oregon bears.”

The cub makes a bee line for his house the minute he spots us. Maughan’s
assistant John Knight explains this bear and two others are the only
ones here at the center.

The bear pokes his head out then ducks right
back inside as I check out the roomy enclosure. There are logs to play
on and green apples to eat.

John: “That’s their swim tub.”

Sadie: “They have a swim tub.”

John: “Yep. They like to break it often.”

Sadie: “Will they get in there during the winter?”

John: Yeah. Some bears do. It’s odd. One bear last year was in it everyday. It was
snowing – 30 degrees. He was in it.”

These cubs are orphans. We don’t really know what happened to their
mothers. They may have been killed by licensed hunters or even illegally killed.

Each year more orphaned cubs show up at Maughan’s place. She’s one of only
a few bear rehabilitators in the West.

Jon Rachael works for the Idaho Fish and Game as a wildlife manager. He says they have
to turn to people like Maughan.

“We simply don’t have the personnel or resources to handle all
of that.”

Just in the last year, Sally Maughan took in 53 bears. It was a bad
year
for berries and there were a lot of wildfires around
the West.

“What are you going to do? Say, ‘I’m sorry I can’t take you – just die?’ Uh-uh. Can’t do
that. So, hopefully, eventually, there’ll be some more rehab-ers
for bears. It’s a lot of money, a lot of time, a lot of energy.”

The World Society for the Protection of Animals covers most of Maughan’s
expenses. She relies heavily though on donations. It’s still not enough.

Anything left from her paycheck as a travel agent goes back to the bears.
She’s even wiped out her retirement just to get these black bears back
into the wild where they belong.

For The Environment Report, I’m Sadie Babits.

Climate Change and Wildfires

Jennifer Pierce and David Wilkins stand in front of a ponderosa pine forest just outside the city of Boise. They hope to study the relationship between fire and climate here and recreate a snapshot of ancient climate. They are both teach at Boise State University's Geosciences Department. (Photo by Sadie Babits)

Twenty years ago this year, the
country watched its oldest national park
go up in flames. Looking back, scientists
believe the 1988 fires of Yellowstone
National Park were the signal fire of
climate change. Researchers have been
working ever since to understand this
relationship between climate and wildfire.
Sadie Babits reports on two scientists
searching for clues to ancient climates,
using trees as their guide:

Transcript

Jennifer Pierce wears work boots as she plows down a steep slope in a
ponderosa pine forest.

(sound of walking, twigs breaking)

Her blonde hair is tucked up under her Boise State bronco cap, but it keeps
sneaking out. She has to keep brushing it back under. She and her
colleague David Wilkins are professors who work for Boise State
University’s Geosciences Department. They’re in the middle of tall pines in
a forest just outside of Boise, Idaho. Suddenly she’s crashing across the
brambles and heads for this tree.

“Oh that’s a great one! Wow! Sweet!”

She drops to her knees and shows me how this tree has been scarred by
fire.

“You see this little V shaped cat face here at the bottom of the tree that’s
blackened? So during a fire when the bark of the tree gets damaged that
preserves a record of the fire as a scar on the tree.”

Pierce says since the tree has annual growth rings, she can tell when the
tree got burned.

It’s one way Pierce and Wilkins reconstruct the fire history of this forest.
It’s a key to understanding how climate has affected forest fires in the past.

“I think as we move into a likely warmer and drier future, it’s going to be
increasingly important to understand the relationship between climate and
fire.”

She says climate is the primary control for wildfires. As the West warms,
there’s less control. Recently, that’s meant a lot more wildfires.

(popping sound) “There you go!” (sound of a drill bit going through the tree
with sound of birds and forest)

David Wilkins is twisting an auger into the tree.

“It’s a good upper body workout!” (laughs)

It’s a way to take a sample of the rings of this tree. Within a half-minute,
Wilkins’ auger is stuck. The tree is rotten inside. An eight-inch core is all he
gets.

(sound of drill bit coming out of the tree)

Jennifer Pierce takes a look at this sample Wilkins twisted out. The rings –
some light, some dark – reveal just how the tree has responded to moisture
and temperature.

“If you have a tree that kind of is at the edge of its comfort zone so to
speak, it will be more of a sensitive recorder of those environmental
stresses. See this one looks pretty good.”

Tree rings aren’t the only clue these scientists use to reconstruct historic
climates.

(scraping sound)

“I didn’t bring my big shovel. I kind of feel naked without it.”

Pierce scrapes away dirt and she finds bits of charcoal. She can sometimes
use charcoal for radio carbon dating. But these won’t do.

“But, um, I wouldn’t use them for dating because you want to make sure
that the charcoal is stratographicly in place and that you haven’t had
critters burrowing and mixing things up.”

Charcoal can be dated much further back than the tree rings. It helps
Pierce and Wilkins understand what happened here thousands of years
ago. With samples from other scientists, they’ll get a snapshot of ancient
climate and how it affects wildfire.

And possibly determine what climate change will mean for forests in the
future.

For The Environment Report, I’m Sadie Babits.

Author: Sadie Babits

Saving Salmon From Sea Lions

Transcript

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Citizen Scientists Track Climate Change

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Money Back for Water Bottles

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Communities Welcome Wilderness

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Lead Bullets and Hunters’ Meat

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Lead Poisoning and California Condors

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Orphaned Bear Cubs Find Refuge

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Climate Change and Wildfires

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