FORCES BEHIND FOREST LOSS

As the first seven sections of this site have described, tropical rainforests are incredibly rich ecosystems that play a fundamental role in the basic functioning of the planet. Rainforests are home to probably 50 percent of the world's species, making them an extensive library of biological and genetic resources. In addition, rainforests help maintain the climate by regulating atmospheric gases and stabilizing rainfall, protect against desertification, and provide numerous other ecological functions.

However, these precious systems are among the most threatened on the planet. Although the precise area is debated, each day at least 80,000 acres (32,300 ha) of forest disappear from Earth. At least another 80,000 acres (32,300 ha) of forest are degraded. Along with them, the planet loses as many as several hundred species to extinction, the vast majority of which have never been documented by science. As these forests fall, more carbon is added to the atmosphere, climactic conditions are further altered, and more topsoil is lost to erosion.

Despite increased awareness of the importance of these forests, deforestation rates have not slowed. Analysis of figures from the Food and Agriculture Organization of the United Nations (FAO) shows that tropical deforestation rates increased 8.5 percent from 2000-2005 when compared with the 1990s, while loss of primary forests may have expanded by 25 percent over the same period. Nigeria and Vietnam's rate of primary forest loss has doubled since the 1990s, while Peru's rate has tripled.

Overall, FAO estimates that 10.4 million hectares of tropical forest were permanently destroyed each year in the period from 2000 to 2005, an increase since the 1990-2000 period, when around 10.16 million hectares of forest were lost. Among primary forests, annual deforestation rose to 6.26 million hectares from 5.41 million hectares in the same period. On a broader scale, FAO data shows that primary forests are being replaced by less biodiverse plantations and secondary forests. Due to a significant increase in plantation forests, forest cover has generally been expanding in North America, Europe, and China while diminishing in the tropics. Industrial logging, conversion for agriculture (commercial and subsistence), and forest fires—often purposely set by people—are responsible for the bulk of global deforestation today.

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World's rarest duck flies closer to extinction's edge

The Madagascar pochard, the world's rarest duck, was already thought to be extinct once. After a last sighting in 1991 the species was thought to have vanished until nine adults and four hatchlings were discovered in 2006. However, conservationists have begun to fear that the species will never recover after a survey this year found only six females.

In addition, the survey conducted by the Durrell Wildlife Trust, the Wildfowl and Wetlands Trust (WWT), and The Peregrine Fund (TPF) found that no young of the Critically Endangered species had survived from the previous year.

"The window of opportunity to save the species from extinction is incredibly small, and we must all muster the energy and resources necessary to stop another species from becoming extinct," said Durrell’s Project Leader, Dr. Glyn Young.

A new recovery plan has been established to hold remaining ducks in secure conditions in a facility set to be finished in 2010. In addition, scientists are looking at potential lakes for reintroduction of the species.

"The original plan was to take the first batch of eggs in 2010 but, following the expedition, discussions are underway to see if the timetable can be brought forward to this year’s breeding season, which would see the team return to the lake in October," WWT’s Aviculture Manager, Nigel Jarrett, said. "Once we have secured eggs from the wild, WWT’s and Durrell’s extensive experience of rearing endangered wildfowl, at Slimbridge and Jersey, will be used to breed the birds at a purpose-built facility in Madagascar. This will act as a 'safety net', greatly reducing the immediate risk of extinction. Within three years, the hope is to at least double the total numbers of pochards. In time, these will be released into the wild on suitable sites."



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