Volcanic Landscapes in Sumatra Shape Orangutan Forest Boundaries

Active volcanoes border the last refuges of this endangered ape.

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Sumatra hosts some of Indonesia's most active volcanoes, contributing to its fertile but unstable terrain.

Sumatra sits along the Pacific Ring of Fire, with multiple active volcanoes influencing regional landscapes. Volcanic soils can enhance forest fertility, supporting diverse plant growth. However, eruptions and ashfall can temporarily devastate vegetation. Orangutan populations living near volcanic zones face episodic disturbance risk. Ash deposition can strip leaves and contaminate food sources. Over longer timescales, regrowth may enrich biodiversity. Their habitat exists within a geologically dynamic environment.

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💥 Impact (click to read)

An eruption can defoliate large tracts of forest in days, removing immediate food supply. Orangutans may be forced to relocate into already occupied territories. Competition intensifies in surviving forest patches. Recovery depends on seed dispersal and soil regeneration. Geological disturbance layers onto anthropogenic pressure. Natural resilience is tested in a landscape already fragmented.

Volcanic activity illustrates that orangutan survival has always involved environmental volatility. However, human-driven habitat loss reduces buffer capacity against natural disasters. Large intact forests can absorb volcanic damage more effectively than fragmented ones. Maintaining extensive habitat provides insurance against unpredictable geological events. The ape's future depends on ecological redundancy in a restless landscape.

Source

United Nations Environment Programme

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