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Year: 2011 Author: Riccardo Pravettoni, UNEP/GRID-Arendal
Roads, both existing and planned, are a major threat to Sumatran orangutans as they increasingly fragment populations, making them more vulnerable and less viable. Often such roads are crossing protected areas such as the Gunung Leuser National Park.
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Conservation areas and the Leuser Ecosystem
Fire events in Tripa
Abatement costs for transition from undisturbed forest to other land uses
Ecological zones
Forest loss from 1985-2007 for Sumatra
Forest status