A Revolutionary Technology is Unlocking Secrets of the Forest

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By Rhett Butler for Yale e360

A new imaging system that uses a suite of airborne sensors is capable of providing detailed, three-dimensional pictures of tropical forests — including the species they contain and the amount of CO2 they store — at astonishing speed. These advances could play a key role in preserving the world’s beleaguered rainforests.

This summer, high above the Amazon rainforest in Peru, a team of scientists and technicians conducted an ambitious experiment using a pioneering technology. Deploying a pair of sweeping lasers that sent 400,000 pulses per second toward the ground, as well as an imaging spectrometer that could detect the chemical and light-reflecting properties of individual plants and trees 7,000 feet below, the researchers were able to instantaneously gather a vast amount of information about the unexplored tracts of cloud forest that passed beneath their airplane.

Conceived by Greg Asner, a scientist at the Carnegie Institution for Science, the new system — known as AToMS, or the Airborne Taxonomic Mapping System — has the potential to transform how tropical forest research is conducted. By combining several breakthrough technologies, Asner and his colleagues can capture detailed images of individual trees at a rate of 500,000 or more per minute, enabling them to create a high-resolution, three-dimensional map of the physical structure of the forest, as well as its chemical and optical properties. In Peru, the scientists hoped to not only determine what tree species lay below, but also to gauge how the ecosystem was responding to last year’s drought — the worst ever recorded in the Amazon — as well as help Peru develop a better mechanism for monitoring deforestation and degradation.

Asner’s new system, a significant advance on the so-called Carnegie Airborne Observatory (CAO) that he originally developed in 2006, could also play a vital role in global forestry in the decades ahead. The technology could help alleviate uncertainty about carbon emissions from deforestation and different forms of forest management, both of which are critical to the emerging policy of REDD (Reducing Emissions form Deforestation and Forest Degradation), a UN program that aims to compensate tropical countries for preserving their forests.

“The whole idea was to measure each of the things plant ecologists measure on the ground to evaluate biodiversity,” said Asner, as he flew over the Amazonian cloud forest. Asner is now helping the National Science Foundation develop an airplane with this suite of monitoring technologies, and is in talks with NASA about equipping a satellite with the system.

One of the key technologies Asner uses is known as LiDAR, which employs two powerful lasers to blast through canopy vegetation, reach the forest floor, and return a wealth of information about the forest’s structure. Depending on the aircraft’s altitude, sensors can map the forest at resolutions ranging from 10 centimeters to one meter, fine enough to “see” understory shrubs and epiphytes in tree crowns. LiDAR is also very good for measuring above ground biomass, or the amount of carbon stored in a forest’s vegetation. It can also detect surface elevations to identify watersheds and waterways.

To truly understand an ecosystem, however, scientists need to know more about its characteristics, including aspects that can’t be been with the naked eye. This is where Asner’s CAO really sets itself apart, using newly developed sensors — built by engineers at NASA’s Jet Propulsion Laboratory — that can detect dozens of signals, including photosynthetic pigment concentrations, water content of leaves, defense compounds like phenols, structural compounds such as lignin and cellulose, as well as phosphorous and other micronutrients — all of which can be used to build signatures to distinguish individual plant species, as well as other measures of forest condition. The result, using the so-called VSWIR Imaging Spectrometer, is a system that can map the chemical and spectral attributes of a forest that may have more than 200 species of trees in a single hectare.

“When leaves interact with sunlight, the compounds bend, stretch, and vibrate at different patterns and rates,” said Asner. “These different rates led to different scattering of light. The spectrometer picks up on this and we’ve been able to deduce chemicals from these signatures.”

But for the CAO to accurately assess biodiversity, Asner’s team has to first do the groundwork by creating a database of the chemical and spectral properties of various plants, which are then fed into the CAO’s library of information on individual plant species. These are then correlated with the data collected by the CAO’s various sensors. In the Amazon, Asner and his team conducted extensive, on-the-ground work to compile information on nearly 5,000 plant species. “We have the best team of tree climbers in the world,” said Asner. “They can climb 75 trees a day, conducting full sampling.”

The aircraft that carries the system allows Asner’s team to map very large areas, sometimes more than 49,000 hectares (120,000 acres) a day. In 2009, using an older, less sophisticated version of the system, Asner mapped 4.3 million hectares of Peru’s Madre de Dios region. Now he is working on a bigger scale: nearly the entire Peruvian Amazon. After this, he goes to Colombia and Panama.

“We’re looking at biodiversity in regions that have never been put down on the science map,” said Asner.

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About the author:Rhett Butler is the founder and editor of Mongabay.com, one of the leading sites on the Web covering tropical forests and biodiversity.

Deep in Ecuador’s Rainforest, A Plan to Forego an Oil Bonanza

by Kelly Hearn for Yale e360

Ecuador’s Yasuni National Park is one of the most biodiverse places on Earth and is home to remote Indian tribes. It also sits atop a billion barrels of oil. Now, Ecuador and the United Nations are forging an ambitious plan to walk away from drilling in the park in exchange for payments from the international community.

Hunched in the back of a pickup truck speeding down an oil road near the western border of Ecuador’s Yasuni National Park, Juan Carlos Acacho — a short, wiry Shuar Indian — says he’s never heard of email or the Internet. But the father of six, who supports his family on a small jungle farm plot, has heard that oil companies want to drill in Yasuni, and that the government has been resisting them — a move he applauds.

“But the oil companies always do what they want,” he said, smiling and shaking his head.

The question facing Ecuador now is: Will the oil industry have its way in Yasuni?

From an airplane, the Yasuni National Park is a sea of jungle green, a 4,000-square-mile rainforest wilderness where the Andes Mountains, the Amazon basin, and the equator meet. Created in 1979, the park overlaps ancestral lands of the Waorani Indians and is inhabited by two groups of natives living in isolation. According to a 2010 study in the journal PLoS One, an average upland hectare in Yasuni contains 655 species of trees (more than the United States and Canada combined) and 100,000 species of insects. One section of the park held at least 200 species of mammals, 247 amphibian and reptile species, and 550 species of birds, making the park one of the most biodiverse places on Earth.

“Yasuni is at the center of the richest zone in the Western Hemisphere,” said Matt Finer, one of the authors of the PLoS One study. “It’s the only area where the diversity of four key groups — amphibians, birds, mammals, and vascular plants — all reach their maximum levels.”

In addition to its remarkable biodiversity, Yasuni sits atop a fortune of oil, making the park an emblem of a development crisis bearing down on the entire western headwaters of the Amazon basin. In addition to oil and gas activity, the region’s forests are being besieged by illegal logging, biofuels agriculture, and an influx of colonists. But the remote northeastern corner of Yasuni near the Peruvian border has attracted the most attention because Ecuador’s largest untapped oil reserves — nearly a billion barrels — lie below it.

In 2007, the Ecuadorian government proposed a way out of the green versus black dilemma: It would forego drilling in the pristine swath of the Amazon in exchange for payments from the international community. For more than two years, the idea seemed to languish. But on Aug. 3, Ecuador and the United Nations Development Program (UNDP) signed an historic trust agreement for managing financial contributions from donors, a hard-won prerequisite for collecting pledges to pay Ecuador for foregoing the revenues it would have received from opening Yasuni to oil drilling.

Many questions remain about whether Ecuador can convince the world to pay it to keep “oil in the soil.” But the August agreement has the potential to become a paradigm for global rainforest conservation programs known as REDD, Reducing Emissions from Deforestation and Forest Degradation.

“Nothing like this has ever been signed before,” said Finer, a biologist with the U.S.-based group Save America’s Forests, who says that any oil drilled in Yasuni would likely be sold on U.S. markets.

Esperanza Martinez, an Ecuadorian activist credited with first envisioning the Yasuni initiative, told Yale Environment 360 that the signing was a “momentous occasion,” adding, “Failure to sign the trust probably would have meant an accelerated invasion of oil in the Yasuní.”

The Yasuni Initiative

Rafael Correa, Ecuador’s president, unveiled the Yasuni initiative three years ago, proposing to forego drilling forever in a region known as ITT — which stands for the oil fields of Ishpingo, Tambococha, and Tiputini — if the international community would pay his country half of what it would otherwise get from drilling: an estimated $3.6 billon over 13 years. Along the way, the UNDP said it would oversee a trust fund for the project in order to calm jittery contributors concerned about future Ecuadorian governments reneging.

A socialist who came to power with the help of the country’s social and environmental justice groups, Correa gained political points when he announced that Ecuador was prepared to take a financial hit in order to save the Amazon and steer trust money to alternative energy, sustainable development, and health projects, as well as to programs to protect two isolated tribes in Yasuni, the Taromenane and Tagaeri.

Observers say that Correa has put himself in a win-win situation. If the plan works, he earns domestic political credibility because of growing support within Ecuador for protecting Yasuni. Internationally, he can burnish Ecuador’s growing green image. “Ecuador genuinely thinks that it can be a green pioneer by showing the rest of the world how one can build an economy while protecting the environment,” said Remi Moncel of the World Resources Institute (WRI). “In fact, as is the case with the Galapagos Islands, Ecuador may benefit from ecotourism, one of the economic benefits of protecting nature and advertising such protective actions to the rest of the world.”

If the plan fails, Correa gets to drill in the ITT while saying that he tried to save it.

The scheme would not only help shift Ecuador’s economy away from oil, it would keep 470 million tons of carbon dioxide in the ground. Now, all eyes are on “the little country with a big plan,” as Ecuadorian officials travel to the United States, Germany, Holland, Belgium, France, Norway, Spain, Italy, the United Arab Emirates, Qatar, Saudi Arabia, Kuwait, Syria, and Lebanon to seek contributions in the coming months. The immediate goal: to raise $100 million in 18 months.

Isolated Rainforest Tribes

The sprawling Yasuni jungle is made up of moist forests cut by slow, brown rivers; looming trees flanked by buttress roots the size of small cars; giant butterflies; exotic insects; and the ear-popping caws of toucans stirred up by monkeys. Natives who only recently came into contact with the modern world — the Shuar, Waorani, and Kichwa — slip along silent jungle paths with shotguns or bows. Barefoot, they wear western-style clothes as they hunt spider monkeys and rodents in the dense underbrush. Deeper still, hiding in rainforest isolation but increasingly hemmed in by outsiders looking for oil or timber, are the uncontacted Taromenane and Tagaeri, a handful of nomadic family clans living in elongated, windowless huts, ardently rebuffing contact with modernity.

But more and more, the Yasuni is under assault. Several years ago, the Ecuadorian government set out to limit illegal logging and colonization in Yasuni National Park by building a checkpoint on the one-lane ramshackle bridge where the Via Auca oil road crosses the chocolate brown Shiripuno River as it flows through Waorani territory into Yasuni proper. Today, young soldiers can be seen whiling away the hours in a small concrete building listening to soccer matches on the radio and flirting with local girls.

Maria Castro said she knew that the government wanted to keep oil companies out of some places in Yasuni, but that she had never heard of the ITT initiative. “People think the oil companies are the ones that are going to destroy Yasuni,” said Castro, a diminutive Waorani woman in jeans and a bright green halter top. “But it is the loggers and the colonists who do the most damage.” Skeptically, she nodded to the soldiers at the checkpoint. “They say they are stopping them but I don’t believe it.” Castro said that some Waorani natives wanted oil development, but others were frightened of its fallout: pollution, an influx of outsiders, and alcohol problems.

For the bulk of everyday Ecuadorians living in the country’s grindingly impoverished eastern Amazonian lands, the Yasuni-ITT initiative means little. “I know the oil companies fight with the government, but that is it,” said Marco Rodriguez a street vendor in El Coca, a chaotic jungle town in eastern Ecuador where trucks lumber across a bridge over the Napo River carrying illegally harvested timber from Yasuni. “People are too busy trying to live.”

Castro said she doubts the plan will work because the government in Quito, the capital, can’t be trusted to do what it says. “They can’t even stop people from cutting the timber or selling animals from the jungle,” she said. Others agree. Kelly Swing, a researcher at Ecuador’s University of San Francisco in Quito, said that the world lacks confidence in Ecuador, with its history of political instability. “The plan sounds great,” said Swing, “but I think lots of people simply don’t trust that the government will be able to uphold its part of the bargain.”

Others, however, see the UN’s involvement in overseeing the fund as a key to success. And success means achieving three goals, explained Carlos Larrea, a professor at the Andean University Simon Bolivar in Quito and the technical director of the initiative. “We are mitigating global warming, preserving biodiversity in one of the most important hot spots on the planet, and mitigating poverty by creating sustainable employment,” he said.

How would the Yasuni iniatiative work? Contributions to the fund would come from countries, international organizations, businesses, and individuals. Capital investments would be made in renewable energy projects while the interest earned from those projects would underwrite a separate fund dedicated to reforestation and energy efficiency projects, as well as investments in social programs and science and technology. The fund will give contributors Certificates of Guarantee (CGY) ensuring that “the crude stays, in an indefinite manner, below ground.” The CGYs will be returned at full value if the Ecuadorian government ever opens ITT to drilling. The funds generated by the initiatives will be invested throughout Ecuadorian society, though there are no details yet about which organizations would receive the money.

“This plan has the goal of creating a new model by making the country less dependent on revenues from fossil fuels and protecting Ecuador’s most precious natural assets” said Moncel of WRI. “This is a good example of low-carbon development, where economic growth is pursued hand-in-hand with environmental protection.”

Trust payments from the Yasuni initiative are designed to support reforestation and forest preservation programs even outside the boundaries of the park, potentially involving 5 million hectares across Ecuador — nearly 20 percent of the country. Larrea said that the Yasuni model could be a good one for a host of developing countries — such as Peru, Papua New Guinea, and the Republic of Congo — that have high biological diversity and reserves of fossil fuels in environmentally sensitive areas.

Many Ecuadorians are proud that their government is pushing back against global oil companies. Ecuador is home to what may be the world’s largest environmental lawsuit, one pitting 30,000 Cofan natives against Chevron for environmentally injurious practices committed by its predecessor company, Texaco. Said Pamela Martin, a former Fulbright Scholar and political scientist at Coastal Carolina University in South Carolina who has worked in Yasuni since 2006, “Many involved in the Texaco situation have said ‘nunca mas’ [no more] and have supported the Yasuní initiative because of what they’ve learned in their multiple-decade battle with Texaco and Chevron.”

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Forest carbon stores may be massively overestimated

Fred Pearce for The New Scientist

Rainforests may store much less carbon than we thought. It could be time to dramatically revise our estimates following the discovery that apparently similar forests hold vastly different amounts of the stuff.

The finding is important because there are plans for governments worldwide to compensate tropical countries for protecting their forests as “carbon sinks” to curb global warming. If carbon cannot be counted, then dollars cannot be disbursed.

Greg Asner of the Carnegie Institution for Science in Stanford, California, and colleagues say they used satellite mapping, laser probing of forest undergrowth from aircraft and local ground surveys across a large area of Peruvian rainforest to crack the problem of estimating how much carbon is locked up in forests. But the new technique has revealed a large, previously unknown variability in the density of carbon stored in apparently similar forests.

The Intergovernmental Panel on Climate Change says that there should be about 587 million tonnes of carbon stored in the study area, 43,000 square kilometres of lowland forest in the Madre de Dios region of Peru.

But after dividing the area into 40 million individual grid squares and estimating for each the carbon stored as well as the rate at which it is being fixed and released, Asner says the real figure is just 395 million tones, a third less.

Hidden patterns

“What really surprised us was how carbon storage differed among forest types and the underlying geology,” says Asner. For instance, where the underlying rocks are younger, the soils and forests contain more carbon. “There has been no way to uncover these incredible patterns till now.”

The study also reveals major carbon loss due to logging, farming, mining and road construction – even in areas still covered by forest. This “forest degradation” made up almost 50 per cent of all carbon lost from the forest. But the study also found substantial carbon accumulated through natural forest regrowth on abandoned land.

Asner is now conducting similar studies elsewhere round the world, which he says can be used to police the United Nations’ proposed initiative on Reducing Emissions from Deforestation and Forest Degradation in Developing Countries. This scheme would compensate countries that protect their forests to store carbon. It’s important that countries with large rainforests do this, because around 15 per cent of global carbon dioxide emissions come from tropical deforestation.

Markku Kanninen, a forest scientist at the Center for International Forestry Research, a World Bank-backed body based in Bogor, Indonesia, agrees: “This research shows the importance of improving our data on forest carbon. The IPCC global default values are not precise enough for national inventories.”

Journal reference: Proceedings of the National Academy of Sciences, DOI: 10.1073/pnas.1004875107

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Scientists sound warning on forest carbon payment scheme

Mongabay

Scientists convening in Bali expressed a range of concerns over a proposed mechanism for mitigating climate change through forest conservation, but some remained hopeful the idea could deliver long-term protection to forests, ease the transition to a low-carbon economy, and generate benefits to forest-dependent people.

Presenting at the annual Association for Tropical Biology and Conservation, scientists and policy experts warned that the Reducing Emissions from Deforestation and forest Degradation (REDD) program outlined in international climate talks could fail to achieve the desired outcome of protecting forests, while having detrimental impacts on biodiversity and local livelihoods, if it isn’t properly designed or excludes critical safeguards. Some researchers argued that the economics of REDD may fall short of competing with returns from other forms of land use, including logging and plantation development, while others said that a successful REDD program could undermine wildlife-friendly farming approaches, promote conversion of low carbon landscapes for industrial tree-planting projects, and shift conservation priorities toward carbon-dense ecosystems.

“REDD is a potentially excellent mechanism by which to address GHG emissions while incidentally contributing to biodiversity conservation and the maintenance of ecosystem services,” said Jaboury Ghazoul, an ecologist at ETH Zurich, who discussed potential unrealized costs of REDD. “There are, however, challenges to overcome, ranging from the administrative and technical implementation of REDD, to the wider knock-on effects on downstream livelihoods and regional development. As scientists keen to see the successful implementation of REDD we must also recognize and grapple with its wider challenges.”

Several presenters used the host country of Indonesia, which recently signed a one billion dollar deal with Norway to reduce emissions from deforestation and forest degradation, to provide context of the types of problems that could befall a poorly designed and implemented REDD mechanism.

Financial fraud

Christopher Barr, a former CIFOR researcher, pointed to financial mismanagement and outright fraud in Indonesia’s Reforestation Fund as an example. He noted that during former Indonesian President Soeharto’s reign the country’s Reforestation Fund suffered losses of more than $5.2 billion – much of it to corruption and fraud. Although the current administration has taken steps to improve financial controls, hundreds of millions more have been misappropriated or wasted on poorly managed projects in recent years.

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