Orangutans are fruit-eating animals and play an important role in the dispersal of seeds over large areas. If orangutans become extinct, several tree species will also become extinct, especially those with larger seeds.

The tropical rainforest where Sumatran orangutans live is also home to Other spectacular species include the rare Sumatran tiger, Sumatran elephant, and Sumatran rhino.

The forests that are home to orangutans are an important source of clean water. Rivers and streams This forest provides water for local communities for drinking, cooking, bathing, irrigation and power generation hydroelectric power. Forests are also a source of valuable wildlife products such as honey and rattan.