Borneo - Ecology

Ecology

The Borneo rainforest is 130 million years old, making it the oldest rainforest in the world. There are about 15,000 species of flowering plants with 3,000 species of trees (267 species are dipterocarps), 221 species of terrestrial mammals and 420 species of resident birds in Borneo. There are about 440 freshwater fish species in Borneo (about the same as Sumatra and Java combined). It is the centre of evolution and radiation of many endemic species of plants and animals. The Borneo rainforest is one of the only remaining natural habitats for the endangered Bornean Orangutan. It is an important refuge for many endemic forest species, including the Asian Elephant, the Sumatran Rhinoceros, the Bornean Clouded Leopard, the Hose's Civet and the Dayak Fruit Bat. The World Wide Fund for Nature has stated that 361 animal and plant species have been discovered in Borneo since 1996.

The World Wide Fund for Nature divides the island into seven distinct ecoregions. The Borneo lowland rain forests cover most of the island, with an area of 427,500 square kilometres (165,100 sq mi). Other lowland ecoregions are the Borneo peat swamp forests, the Kerangas or Sundaland heath forests, the Southwest Borneo freshwater swamp forests, and the Sunda Shelf mangroves. The Borneo montane rain forests lie in the central highlands of the island, above the 1,000 metres (3,300 ft) elevation. The highest elevations of Mount Kinabalu are home to the Kinabalu mountain alpine meadow, an alpine shrubland notable for its numerous endemic species, including many orchids.

The island historically had extensive rainforest cover, but the area shrank due to heavy logging for the Malaysian plywood industry. Half of the annual global tropical timber acquisition comes from Borneo. Furthermore, Palm oil plantations are rapidly encroaching on the last remnants of primary rainforest. The rainforest was also greatly destroyed from the forest fires of 1997 to 1998, which were started by the locals to clear the forests for crops and perpetuated by an exceptionally dry El Niño season during that period. During the great fire, hotspots could be seen on satellite images and the haze thus created affected the surrounding countries of Brunei, Malaysia, Indonesia and Singapore.

In February 2008, the Malaysian government announced the Sarawak Corridor of Renewable Energy plan to harvest the virgin hinterlands of Northern Borneo.