Tag: groups

Recording Elephant Conversations

  • Elephants talk amongst themselves below levels we can hear. (Photo courtesy of the Elephant Listening Project in Dzanga National Park)

Biologists are always trying to
get a good count of the animals
they’re studying. You wouldn’t
think it’d be that hard to find
an elephant for a count, but even
some of the largest animals are
difficult to count in the wild.
So researchers are now trying new
methods. Emma Jacobs reports on
a Cornell University project which
is using audio recordings to learn
more about elephants:

Transcript

Biologists are always trying to
get a good count of the animals
they’re studying. You wouldn’t
think it’d be that hard to find
an elephant for a count, but even
some of the largest animals are
difficult to count in the wild.
So researchers are now trying new
methods. Emma Jacobs reports on
a Cornell University project which
is using audio recordings to learn
more about elephants:

Mya Thompsons sits down in her lab and pulls up a set of recordings on her computer. She helped tape these sounds for the Elephant Listening Project in Dzanga National Park in the Central African Republic. She plays a recording made in the forest, late at night.

(sounds of the forest at night)

“You heard some insects, you heard some sort of the din of a nighttime forest.”

But you probably don’t hear elephants.

Next, Thompson takes the same sound and speeds it up on her computer. Suddenly, you can hear something else.
“This is 4-times normal speed.”

(sound of forest at night, but with rumbles)

Elephants make those low rumbles. When she speeds up the playback, they rise in pitch. It’s kinda of like the voices of Alvin and the Chipmunks.

It turns out elephants talk among themselves below levels we can hear. Biologist Kaity Paine discovered these sounds in the 1980s. She realized that because elephant rumbles are so low, they travel long distances. This should make them useful to track elephants over wide forests, but Thompson remembers that in the field, it was hard to see how.


“We’re collecting all this information and we wanted to know what the calls were like, but because we can’t hear them, we were almost totally in the dark about what was going on.”

When she got back to New York, Thompson and the rest of the research team started combing through all the audio and video collected in Central Africa for elephant calls. It took thousands of hours.

But with time, they could nail down a pattern. The key was a relationship between the audio recordings and the video of elephants they had made in one clearing popular with elephants.

“This is a communication system. There are a lot of other variables other than, ‘Hi I’m here,’ but, overall, the more calling, the more elephants and that was good news for us.”

Now Thompson can monitor elephants over huge areas of this dense forest using these audio recordings.

In the field, the team hoists their recorders into trees attached to truck batteries. They can stay up there a long time, which has real advantages.

“Usually, when you take a survey, you go, you count, and you leave. For acoustics, we’re able to have this recorder up continuously without all this human effort and make repeated estimates over longer periods of time.”

With enough information, Thompson can estimate at the numbers of elephants in a forest with twice the precision she could have before.

Marcella Kelly teaches wildlife field techniques at Virginia Tech. She says, when you can track animal numbers closely, you can see how they respond to changes in their environment. This is a must for conservation.

“We really need effective ways to estimate population size, especially because decisions are made on management based on what those numbers tell us, over time.”

The Elephant Listening Project recently started monitoring elephants in the African nation of Gabon.


“The authorities had allowed gas exploration to see if there’s any petroleum reserves there, and so our project was asked to monitor the forest for elephant calls before, during, and after this exploration.”

Thompson can already say that things have changed. Elephants have started coming out more at night than during the day to avoid people. In the end, hopefully she’ll be able to see just how disruptive changes have been and to pinpoint the human activities causing problems.

She also wants to protect other animals making noise in the forest, and outside it.

“We’re really hoping that these methods that we’ve developed, will be developed for not only forest elephants but for other species that are hard to survey that we really need to know more about before we can protect them.”

For right now though, Thompson is still in her lab, listening for elephants.

For The Environment Report, I’m Emma Jacob

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Fruit Foragers in the City

  • Foraging for fruit from people’s yards is one thing. Foraging for fruit in people’s alleys, another. Woody Sandberg says he avoids foraging in alleys where people conduct business. (Photo by Louise Baker)

With everybody looking for ways to save money, free food has never looked better. Devin Browne followed around a group of people who forage for fruit in the city. They look for fruit trees on private and public property to see what they can grab:

Transcript

With everybody looking for ways to save money, free food has never looked better. Devin Browne followed around a group of people who forage for fruit in the city. They look for fruit trees on private and public property to see what they can grab:

It’s perfectly legal here in Los Angeles to pick fruit from trees that are planted on private property as long as the fruit drops into a public space — like a sidewalk or an alley.

There are rules, though, to proper, legal urban foraging and the group Fallen Fruit knows them well. Woody Sandberg is with the group.

“You’re not allowed to reach across someone’s fence. You’re not allowed to reach into someone’s yard. You’re not allowed to crawl up people’s fences or lean ladders on their fences.”

Most of the people in Fallen Fruit ride bikes, sometimes mopeds. A lot of them carry fruit pickers on their back like you might carry a bow and arrow. There’s something almost primal in the way they all look together, fanning out into the street like a band of hunter/gatherers in search of fresh food.

(sound of street and birds)

“We’re looking for trees or any thing that produces food that hangs over the fence so we can pick it and eat it.”

Sandberg’s not actually picking fruit today – he’s just finding the best places to forage.

Later, they’ll go on a harvest ride. Then they’ll make jam and juice and beer with the fruit they’ve found. Today, the mission is just to make maps of where the trees are.

“Over here we got nopalitos and a lime and some nasturiums.”

People sitting on their porches seem not to mind at all when the group stops outside their house. No one in Fallen Fruit can remember a time when a fruit tree owner yelled or screamed or tried to kick ‘em off the sidewalk.

(sound of foragers giving directions to each other)

Which none of the foragers seem surprised by. Fallen Fruit is highly convinced of their mission. Part of this sense of legitimacy comes from the fact that the group originally conceived of itself in biblical terms.

The name Fallen Fruit even comes from a verse in Leviticus: “You shall not pick your vineyard bare or gather the fallen fruit of your vineyard. You shall leave them for the poor and the stranger.”

The founders also thought that cities should start planting fruit trees in public spaces, instead of thirsty, frivolous plants.

But fruit trees are oddly political. And city officials say there are reasons why they do not and will not plant them in public space.

The first reason LA’s Chief Forrester, George Gonzalez, gave had to do with people tripping and falling on fruit & then suing the city.

“One of the main reasons is a potential liability from fruit—fruit drop.”

He also said that trends in tree-planting have changed and they like to plant hearty , drought-resistant trees now.

“Also, fruit trees require more water.”

And then, there are the rats.

“Rodents love fruit trees… yes.”

Still, the City regularly gives away fruit trees to people who want to plant them in their yards.

It’s part of the mayor’s Million Trees LA pledge. Like Sandberg, Gonzalez sees fruit trees on private space as a way to benefit the public good.

“Cause when they look at a map and see it dotted everywhere with fruit trees hanging over the fence I think its going to blow people’s minds about how much food is out there. Because the current mindset is that food is in the grocery store.”

It’s a mindset not even the most dedicated of fruit foragers can escape.

After the mapping mission, Woody Sandberg left on his bike for the supermarket, because, he says, unfortunately chocolate soymilk doesn’t grow on trees.

For The Environment Report, I’m Devin Browne.

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A New Clean Energy Corps?

Labor and energy groups say they want the federal government to create a Clean Energy Corps. The say the Corps would retro-fit and upgrade old buildings and, as Chuck Quirmbach reports, create a lot of jobs in the process:

Transcript

Labor and energy groups say they want the federal government to create a Clean Energy Corps. The say the Corps would retro-fit and upgrade old buildings and, as Chuck Quirmbach reports, create a lot of jobs in the process:

Some cities and states have programs that work on making older buildings more energy efficient.

Now, progressive think tanks have joined unions and alternative energy groups to ask for a national program.

Bracken Hendricks is with the Center for American Progress. He says it’s critical for the federal government to help pay to make older structures more efficient.

“For a long time, we’ve made great inroads on improving the energy efficiency and the performance of new buildings with tools like green building standards. But we really haven’t had a way to go and systematically block by block retrofit and weatherize homes.”

Hendricks says the clean energy corps would help the umemployed find work in the building and construction trades.

The coalition backing the corps says the money for the program could come from the stimulus package or other upcoming legislation.

For The Environment Report, I’m Chuck Quirmbach.

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Greens React to Bush Re-Election

  • The re-election of George W. Bush has many environmental groups worried. (Photo by Judi Seiber)

Environmental groups worry that the Bush administration will further dismantle environmental protection laws during its next term. The Great Lakes Radio Consortium’s Lester Graham reports:

Transcript

Environmental groups worry that the Bush administration will further dismantled environmental protection laws during its next term. The Great Lakes Radio Consortium’s Lester Graham reports:


The big environmental groups have been very critical of George W. Bush’s first term in office. Despite speculation that the President will take more moderate positions in this next term, environmental groups such as the Natural Resources Defense Council are skeptical. Greg Wetstone is the NRDC’s Director of Advocacy.


“We have to prepare for the worst and we’re hoping for something better. We would like to see this president use the election as an opportunity to embrace more broadly the support for environmental protection held across the public. But, we can’t be naïve.”


In a letter to NRDC’s members, the group’s president took it a step farther, writing that -quote- the White House attacks of the past four years are but the leading edge of a much broader assault that will come in a second term. Other environmental groups are expressing similar skepticism.


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

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Epa Takes Heat on New Chemical Exposure Study

  • The Environmental Protection Agency is getting some criticism from environmental groups for their partnership with the American Chemistry Council. (Photo courtesy of epa.gov)

The Environmental Protection Agency is drawing fire from some environmental groups for accepting money from the chemical industry for a study on children’s exposure to pesticides. The Great Lakes Radio Consortium’s Rebecca Williams has more:

Transcript

The Environmental Protection Agency is drawing fire from some environmental
groups for accepting money from the chemical industry for a study on
children’s exposure to pesticides. The Great Lakes Radio Consortium’s
Rebecca Williams has more:


The EPA has accepted a two million dollar contribution from the American
Chemistry Council to help fund the exposure study.


Some environmental groups are saying the partnership is a conflict of
interest for the agency. Tim Kropp is a senior scientist with the
Environmental Working Group.


“It doesn’t make sense for them to say that there’s no influence, and that it’s
all right for the regulated industries to be involved in a study that’s
going to affect policy, or may affect policy.”


EPA officials counter that the study design has been independently reviewed.
And that the American Chemistry Council won’t be able to affect the outcome
of the study. Linda Sheldon is with the EPA’s human exposure and
atmospheric sciences division.


“The American Chemistry Council is independent of the individual companies
that produced these particular chemicals. We feel that we have complete
control over the study and control over the research findings.”


Sheldon says the information from the study will be used for future EPA risk
assessments of chemicals.


For the Great Lakes Radio Consortium, I’m Rebecca Williams.

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Casting for Recovery

When a woman is diagnosed with breast cancer, she often feelsisolated. That’s why so many breast cancer survivors turn to supportgroups. Most are in church basements or classrooms. But the GreatLakes Radio Consortium’s Karen Kelly visited a group that seeks solaceoutside – on the banks of a trout stream.