Himalayan forests disappearing

THE Himalayas may never be the same again. The forests growing on the roof of the world are disappearing, and the rate of deforestation is so rapid that a quarter of animal and plant species native to this biodiversity hotspot, including tigers and leopards, could be gone by the end of the century.

Worse, the Indian government is oblivious to the problem because official figures erroneously suggest that forest cover will rise rather than fall. This mistake has led to the approval of new schemes, such as hydroelectric dams, that will exacerbate the devastation.

The Himalayan region has long been recognised as extremely rich in animal and especially plant diversity. For instance, a paper published last year in Science (vol 308, p 405) concluded that Himalayan watersheds harbour more diverse ecosystems than the Amazon. "Himalaya's importance as a biodiversity-rich area and its need for conservation cannot be overemphasised," says Maharaj Pandit of the University of Delhi, India.

Now a team of researchers led by Pandit have revealed evidence of widespread deforestation in the Indian Himalaya region, which threatens tigers, black bears, musk deer, leopards, golden eagles and bearded vultures that depend on the forests. Large-scale conservation efforts are urgently needed to avoid the disappearance of these animals from the region, they say.

Pandit's team analysed high resolution satellite images of the region dating from 1972-1974, 1980-1983 and 1999-2001. The team also went out into the field to verify ground features that could not easily be identified in the images. They classed regions with more than 40 per cent forest cover as dense forests, and those with between 10 and 40 per cent of cover as open forests. By 2000, the region had lost 15 per cent of its forest cover compared with the early 1970s. By 2100, it will have lost almost half its forests, the team predicts.

Less than one-third of the dense forest on which many nativ


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