In the lowlands of Southeast Asia, the island of Borneo faces rates of primary forest degradation and deforestation exceeding tropical forests across the globe. For critically endangered Bornean orangutans (Pongo pygmaeus wurmbii), habitat loss greatly threatens the long-term stability of remaining populations. With rates of forest loss and fragmentation on the rise, it is critical we explore the role of anthropogenically-modified landscapes in conserving wild orangutans. Here I investigate orangutan habitat quality within Gunung Palung National Park (GPNP), in Borneo, Indonesia, focusing on the conservation value of a secondary forest with a history of logging. Orangutans in GPNP flexibly inhabit a range of habitats within the primary forest, suggesting the nearby secondary forest could provide population support if sufficient resources are available. Monthly phenology and focal follow data were utilized to assess feeding behavior in relation to food availability. While overall fruit availability was consistently higher in the primary forest, the abundance and fruiting frequency of preferred foods were significantly greater in the secondary forest. The fruiting pattern of preferred resources also significantly predicted orangutan presence. These findings suggest post-disturbance landscapes, if safeguarded and able to become secondary forest, could be vital areas of refuge for Bornean orangutans across an ever-changing landscape.
| Identifer | oai:union.ndltd.org:bu.edu/oai:open.bu.edu:2144/48264 |
| Date | 26 February 2024 |
| Creators | Zdanowicz, Victoria Rose |
| Contributors | Knott, Cheryl D. |
| Source Sets | Boston University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis/Dissertation |
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