New! Sign up for our free email newsletter.
Science News
from research organizations

Orangutans take the logging road

Date:
February 2, 2015
Source:
Simon Fraser University
Summary:
'Foot' travel by Borneo's shaggy apes may be evolving more than initially thought, researchers have discovered. The Bornean orangutan not only regularly walks Wehea Forest floors to travel, but also hits newly constructed logging roads, researchers have observed.
Share:
FULL STORY

A new discovery by a Simon Fraser University doctoral student in the School of Resource and Environmental Management, published in Oryx, demonstrates that orangutans may be even more adaptable than he first thought.

In the latest stage of his field research, Brent Loken has observed that the Bornean orangutan not only regularly walks Wehea Forest floors to travel but also hits newly constructed logging roads.

The 38,000 hectare mostly undisturbed rainforest in East Kalimantan, where an international team led by Loken has been studying orangutans and clouded leopards for two and a half years, is surrounded by logging concessions.

To date Loken, a former recipient of the Trudeau Doctoral and Vanier Canada Graduate scholarships, thought that Borneo's swinging male apes only occasionally dropped down from their rainforest home's canopies to travel its floor.

Loken's latest discovery helps to reveal that orangutans may be trying to adapt to the rapid and unprecedented loss of their Borneo habitat, which is increasingly being eroded by timber plantations, agro-forestry and mines.

"These findings indicate these apes' terrestriality may be a regular strategy employed almost equally by males and females," says Loken, who co-founded the NGO Integrated Conservation (ICON), after witnessing Borneo's rapid loss of forest. "We knew that large males tended to walk the ground. However, we found that males and females, even females with babies, were recorded almost equally walking on logging roads, trails and ridges."

Researchers installed motion-triggered cameras in three regions of the Wehea Forest--one ancient and untouched, one previously logged and recovering, and one region adjacent to Wehea Forest that is now being logged. Daytime photographs of orangutan movements revealed that the apes frequently hike through pristine and regenerating forests, cleared areas, and even along deserted logging roads.

Their expanding avenues of travel may be an adaptive strategy that could improve their chances of surviving sustainable logging. But Loken cautions: "We must be careful not to reinforce the notion that orangutans can survive in any human-altered landscape. They still need trees and lots of them, and the protection of Borneo's remaining forests should continue to be of the highest priority for Indonesia and the rest of the world."


Story Source:

Materials provided by Simon Fraser University. Note: Content may be edited for style and length.


Journal Reference:

  1. Brent Loken, Chandradewana Boer, Nunuk Kasyanto. Opportunistic behaviour or desperate measure? Logging impacts may only partially explain terrestriality in the Bornean orang-utan Pongo pygmaeus morio. Oryx, 2015; 1 DOI: 10.1017/S0030605314000969

Cite This Page:

Simon Fraser University. "Orangutans take the logging road." ScienceDaily. ScienceDaily, 2 February 2015. <www.sciencedaily.com/releases/2015/02/150202132617.htm>.
Simon Fraser University. (2015, February 2). Orangutans take the logging road. ScienceDaily. Retrieved November 1, 2024 from www.sciencedaily.com/releases/2015/02/150202132617.htm
Simon Fraser University. "Orangutans take the logging road." ScienceDaily. www.sciencedaily.com/releases/2015/02/150202132617.htm (accessed November 1, 2024).

Explore More

from ScienceDaily

RELATED STORIES