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Report: Indonesian floods killed at least 7% orangutans, a rare species.

A new report released on Wednesday shows that deadly landslides and floods in Indonesia's Sumatra have killed at least 7% the population of critically endangered tapanuli apes. At least 1,200 people were killed and 300,000 homes damaged by the cyclone-induced floods and landslides. Environmental groups blamed the rapid deforestation on Sumatra for the extent of damage.

The report said that at least 58 Tapanuli Orangutans were killed by the floods. These orangutans are native to north Sumatra, in an area called Batang Toru Forest. This forest is also home to the majority of the 800 primates.

The report was a joint study of Borneo Futures in Brunei, World Weather Attribution, and Liverpool John Moores University. It did not cover the rest of the forest. This means that the death toll may have been higher.

Satellite images of damage to the West Block of Batang Toru, and historical records of orangutan populations in the area were used to derive the findings.

The study found that climate change caused by humans has increased extreme rainfall in the Malacca Strait area, which puts the habitat of the Tapanuli Orangutan at greater risk.

Erik Meijaard, the lead author, from Borneo Futures said that the heavy rains soaked up the soil to the point where large areas of?hillsides within the primary forest collapsed into fast-moving land slides.

He said: "If you are caught as an orangutan... If anything falls at high speeds, your chances of survival will be minimal. So it was a concern."

This level of?loss?is substantial for an animal with a very small population. Combining this with other pressures, such as habitat destruction and conflict between humans and wildlife, makes it even more urgent to implement and properly resource a coordinated species action plan.

Panut Hadisiswoyo is another researcher who urged the Indonesian Government to work with NGOs and other researchers to "prevent further decline in orangutan population".

"We can reduce the poaching and hunting?and then probably stabilise the number," he said. He added that all parties should pay attention to poor land use, which contributes to a declining population. (Reporting and editing by Gibran Pshimam, David Stanway, and Ananda Teresia)

(source: Reuters)