National Geographic Society

Slowing deforestation is the most promising new strategy to protect the planet from disruptive climate change--but if it is not done carefully and sensibly biodiversity could be risk, an international group of scientists warned today.

"While it is clear that the massive destruction of tropical rainforests poses a serious threat to the incredibly rich biodiversity found on Earth, others hazards are not so explicit," the group says in an essay published in the November 16 issue of the journal Current Biology.

The group made their statement in anticipation of an international agreement that global warming can be slowed by reducing carbon emissions caused by deforestation.

Truck loaded with logs harvested from an Indonesian forest.

NGS stock photo by James P. Blair

The United Nations Framework Convention on Climate Change (UNFCCC) consists of 192 countries that seek to develop intergovernmental policies that address challenges posed by climate change. The UNFCCC will meet in Copenhagen in December of 2009 to complete an agreement on incentives to reduce deforestation.

"Reduced Emissions from Deforestation and Degradation (REDD) proposes to compensate tropical forest countries if they reduce their rate of deforestation, thereby reducing greenhouse gas emissions, and includes strategies for conservation and enhancement of forest carbon stocks," the scientists say in a news statement.

"REDD should have multiple benefits. But, unfortunately, although the final rules might safeguard carbon stocks, they may fall short of their potential to protect biodiversity," says the author who organized the collaboration, Stuart L. Pimm from The Nicholas School of the Environment at Duke University. Pimm is a regular blogger for NatGeo News Watch and a former member of the National Geographic Committee for Research and Exploration.

Pimm and colleagues explain in their essay how REDD policies might have a less than advantageous impact on biodiversity and suggest how careful policies might reduce carbon emissions and benefit biodiversity.

Aerial view of clear cutting on a mountain side in Papua New Guinea.

NGS stock photo by James P. Blair

The researchers point out that if REDD emphasizes reducing deforestation rates, governments are likely to focus on areas that are cheapest to protect and that areas with high biodiversity might not be cost-competitive.

"Further, forests with the greatest density of carbon might not be the most essential locations for biodiversity conservation. There is also concern that deforestation processes will not be effectively abated by REDD, but simply displaced to other areas," the scientists say in their statement.

"Implementing REDD might accelerate the conversion and degradation of high biodiversity areas where REDD or other conservation funding is not available."

"Implementing REDD might accelerate the conversion and degradation of high biodiversity areas where REDD or other conservation funding is not available," Pimm explained.

The authors make several suggestions for maximizing the positive biodiversity impacts of REDD policies.

They propose that rules to conserve, assess and perhaps even financially support biodiversity should be included in the text of the Copenhagen agreement.

"Biodiversity, itself, is essential to ecosystem adaptation. Ensuring that REDD policies not only reduce carbon emissions but conserve biodiversity will ensure that humanity and the biosphere can be as resilient as possible to climate disruptions," Pimm said.

The coniferous forest that wraps around the subarctic latitudes of the Northern Hemisphere offers the world's best opportunity to apply conservation as a climate change strategy, according to a report released today.

The boreal forest, as it is called, must be preserved because it is holding vast amounts of carbon in and under its trees, and also because it offers a buffer for plants and animals impacted by climate change.

Cut down those trees and develop the land and all that carbon will be released into the atmosphere--and the animals and plants seeking sanctuary from the warmer lower latitudes will have nowhere to go.

Carbon-rich wetlands in Canada's Northwest Territories.

Photo by Chad Delany, Ducks Unlimited

"When the world thinks of forests and their value to offset global warming, tropical forests come to mind," say the Boreal Songbird Initiative and the Canadian Boreal Initiative, sponsors of the report The Carbon the World Forgot.

The report released today shows that the global impact of Canada's boreal forest, which stores nearly twice as much carbon per acre as tropical forests, has been vastly underestimated.

Canada's boreal forest

Map courtesy of Boreal Songbird Initiative

"The Carbon the World Forgot identifies the boreal forests of North America as not only the cornerstone habitat for key mammal species, but one of the most significant carbon stores in the world, the equivalent of 26 years of global emissions from burning fossil fuels, based on 2006 emissions levels. Globally, these forests store 22 percent of all carbon on the earth's land surface," says a statement accompanying the release of the report.

Breakdown of carbon stored by global forest biome

Chart courtesy of Boreal Songbird Initiative

"Past accounting greatly underestimated the amount and depth of carbon stored in and under the boreal forest," says Jeff Wells, an author of the report. "In addition to carbon storage in trees, organic matter accumulated over millennia is stored in boreal peatlands and areas of permafrost. Some of this boreal carbon has been in place for up to 8,000 years."

"The boreal forest's status as the most intact forest left on Earth also offers a unique opportunity for plants and animals forced to adapt to shifting habitats."

The boreal forest's status as the most intact forest left on Earth also offers a unique opportunity for plants and animals forced to adapt to shifting habitats. Most other habitats today are highly fragmented by human activity, creating a variety of additional obstacles for species survival, the statement added.

Oscar Lake in Canada's Northwest Territories

Photo by D. Langhorst, Ducks Unlimited

"In light of these findings, today's report urges that international negotiations on carbon and forest protection consider ways to account for and protect the boreal," the authors say.

"Any effective and affordable response to climate change should include preserving the world's remaining, carbon-rich old-growth forests," said Steve Kallick, director of the Pew Environment Group's International Boreal Conservation Campaign. "This report makes clear that nations must look not just at the tropics but at all the world's old-growth forests for climate change solutions."

Top intact forests--largest in red, followed by yellow and green, representing forests undisturbed to date by humans.

Map courtesy of Boreal Songbird Initiative

"Keeping that carbon in place by protecting boreal forests is an important part of the climate equation," said Andrew Weaver, "If you cut down the boreal forest and disturb its peatlands, you release more carbon, accelerating climate change." Weaver of the University of Victoria is a lead author for the United Nations Intergovernmental Panel on Climate Change, which was awarded the Nobel Prize.

Triangle Lake, part of northern Ontario's boreal forest

Photo by Jeff Wells, Boreal Songbird Initiative

"The collision of climate disruption and massive human degradation of ecosystems is seriously worrying globally," said conservation biologist Stuart Pimm of Duke University. "These changes are surely novel in earth's history. Maintaining the boreal forest's intactness will be critical to slowing ecosystem shifts and to providing migratory corridors for displaced wildlife." Stuart Pimm is a regular contributor to NatGeo News Watch. 

Global warming is expected to affect caribou populations worldwide, like this small herd near MacMillan Pass, in Canada's Northwest Territories.

Photo by Larry Innes, Canadian Boreal Initiative

"Conservation can be an important tool in the fight to mitigate climate change," said Larry Innes, director of the Canadian Boreal Initiative, a sponsor of the report. "International protocols and legislation need to create opportunities to maintain the carbon stored in intact boreal forest soils, peatlands, and wetlands while enabling indigenous and local communities to take a leadership role in determining how to best conserve not only carbon, but the full suite of ecological, cultural and economic values that the boreal forest represents."

The Bay-breasted warbler has declined 70 percent over the last 40 years. Only 7 percent of its boreal forest habitat is protected. The migratory bird breeds in the coniferous woodlands.

Photo by Jeff Nadler

More than 1,500 international scientists led by authors for the United Nations' Intergovernmental Panel on Climate Change recommended in 2007 that at least half of Canada's boreal forest be protected from further disturbance--in large part to keep both the boreal forest carbon bank and internationally significant wildlife habitats intact.

Despite the current lack of international protocol, several Canadian First Nation, provincial, and federal governments have taken important steps to protect hundreds of millions of acres of Canada's carbon rich boreal forest. In all, scientists are recommending that at least 300 million hectares be protected.

Read on for more photos, maps, and the full text of the executive summary of the report The Carbon the World Forgot:

► Read This Entire Post

Koalas could be in deep trouble. Their numbers have dropped by 20-60 percent in six years, owing to habitat loss and the sexually transmitted disease chlamydia.

If the steep decline continues unchecked, Australia's iconic tree-climbing koala could be extinct by 2040, the Australian Koala Foundation (AKF) said this week. The foundation is a charity dedicated to the conservation and effective management of the wild koala and its habitat.

NGS photo by Joe Scherschel

AKF CEO Deborah Tabart is concerned that the Australian administration will remain reluctant to list the koala as a threatened species, the foundation said in a statement.

The AKF released the latest koala census ahead of a meeting by the government's Threatened Species Scientific Committee. The foundation has been trying for years to get the koala listed as a threatened species, an important step for recovery and threat abatement. Previous administrations have not been swayed that the marsupial warrants this status, however.

"Once you get into power you realise that developers and infrastructure builders do not like the environment in the way," Tabart said.

"Our scientists have scoured every inch of the maps, read every piece of literature available, and we are ready for the fight of our lives."

NGS photo by Anne Keiser

To produce the latest estimates of koala numbers, the AKF's researchers visited 1,800 field sites and examined 80,000 trees. Koalas spend much of their lives up trees, especially eucalyptus, their main diet. 

"We are sure we have it right. There could be as few as 43,000 and no more than 80,000 koalas left on the mainland of Australia. We know this because we have the science, and the koala habitat is just not there," Tabart said.

"Previous estimates [made in 2003] were around 100,000, but the data is now more accurate," Tabart added.

"The koalas are missing everywhere we look."