Brachyteles Arachnoides (Muriqui-do-sul / Woolly Spider Monkey) (image) University of East Anglia Share Print E-Mail Caption New research finds that 500 years of over-exploitation has halved mammal populations in South America's once majestic Atlantic Forest. A new analysis of mammal populations reveals the devastating effects of human disturbance since the area was first colonised in the 1500s. As well as looking at individual species, the researchers examined species groups to understand which ecologically related groups of species had diminished most rapidly. They found that apex predators and large carnivores, such as jaguars and pumas, as well as large-bodied herbivores, such as tapirs, were among the groups whose numbers had suffered the most. Credit Mariana Landis 2011 - Wildlife Ecology, Management, and Conservation Lab (LEMaC) Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.