https://phys.org/news/2018-05-minimising-impacts-palm-oil-plantations.html

The researchers used a new camera trapping technique across 2,000 square kilometres of the country's most important palm oil production region and found that while palm oil plantations are not suitable for most mammals to live in, the situation could be improved.

"We found that the number and diversity of species differed significantly between oil palm plantations and their neighboring forests, with the number of species inside oil palm plantations 47% lower, on average, than in the forest," said Mr Pardo.