Forested ultrabasic mountain slopes at Diddadungan, Luzon, Philippines.
Ultrabasic forest above 1,200 metres at Diddadungan, Palanan, Luzon, Philippines; an illustration of this habitat type.Merlijn Van Weerd (MVW), in Brown et al. (2013) · Wikimedia Commons · CC BY 3.0 · Cropped · Original
Ultramafic vegetation · Borneo

Ultramafic vegetation

Vegetation growing on ultramafic substrates adds a geological dimension to Borneo’s habitats. In Kinabalu Park, researchers describe distinct plant communities shaped by both the substrate and elevation.

Characteristics

Soil and elevation describe different aspects of a forest. A montane site can also grow on ultramafic rock, where soil chemistry favours specialised plants. Notice changes in vegetation without assuming that all forests at the same height have the same species. Geology adds another way to read the mountain landscape.

Sources & references · 2UNESCO World Heritage Centre · Kinabalu ParkSabah Parks Nature Journal (2024) · Species Richness and Composition of Alien Plant Species in Marai Parai, Kinabalu Park, Malaysia

Ecological importance

The unusual rock and soil setting helps distinguish Kinabalu’s specialised plant habitats. Nepenthes rajah links the vegetation profile to a documented pitcher plant; its restricted ecological setting makes retaining undisturbed habitat especially relevant.

Sources & references · 7UNESCO World Heritage Centre · Kinabalu ParkRoyal Botanic Gardens, Kew · Nepenthes rajah Hook.f.Royal Botanic Gardens, Kew · Nepenthes rajah: Kew Species Profile and IUCN CategoriesPLOS ONE / Greenwood et al. · A Unique Resource Mutualism between Nepenthes rajah and Members of a Small Mammal CommunityPlant Ecology / van der Ent, Sumail and Clarke; James Cook University repository · Habitat differentiation of obligate ultramafic Nepenthes endemic to Mount Kinabalu and Mount TambuyukonPlant Ecology / van der Ent, Sumail and Clarke; James Cook University repository · Habitat differentiation of obligate ultramafic Nepenthes endemic to Mount Kinabalu and Mount TambuyukonPLOS ONE / Greenwood et al. · A Unique Resource Mutualism between Nepenthes rajah and Members of a Small Mammal Community

Conservation

The study also documents introduced plants along the investigated trails and recommends monitoring and community involvement. A visitor can help by following the current marked route and avoiding plant collection. The study’s field records are ecological evidence, not an assurance that a particular research trail is open for recreational access today.

Sources & references · 1Sabah Parks Nature Journal (2024) · Species Richness and Composition of Alien Plant Species in Marai Parai, Kinabalu Park, Malaysia

Species found here

Examples in the linked species profiles include Nepenthes rajah. Their profiles identify the particular locality and evidence. A habitat association does not mean the species occurs in every patch of that habitat.

Sources & references · 4Royal Botanic Gardens, Kew · Nepenthes rajah Hook.f.Royal Botanic Gardens, Kew · Nepenthes rajah: Kew Species Profile and IUCN CategoriesPLOS ONE / Greenwood et al. · A Unique Resource Mutualism between Nepenthes rajah and Members of a Small Mammal CommunityPlant Ecology / van der Ent, Sumail and Clarke; James Cook University repository · Habitat differentiation of obligate ultramafic Nepenthes endemic to Mount Kinabalu and Mount Tambuyukon

Where this habitat occurs

Sabah Parks research in Marai Parai investigated trails on Mount Kinabalu’s western slope within an ultramafic forest ecosystem. That establishes a documented local setting. It does not show that every Kinabalu trail, every montane forest in Sabah or every mountain elsewhere on Borneo has the same underlying substrate.

Sources & references · 1Sabah Parks Nature Journal (2024) · Species Richness and Composition of Alien Plant Species in Marai Parai, Kinabalu Park, Malaysia

Protected areas

Documented landscapes to explore include Kinabalu Park. These areas contain habitat mosaics; the habitat does not cover their entire surface. Check each area’s access information before a visit.

Sources & references · 2UNESCO World Heritage Centre · Kinabalu ParkSabah Parks Nature Journal (2024) · Species Richness and Composition of Alien Plant Species in Marai Parai, Kinabalu Park, Malaysia

Sources & references

UNESCO World Heritage Centre · Kinabalu ParkAccessed: 2026-10-02

Royal Botanic Gardens, Kew · Nepenthes rajah Hook.f.Accessed: 2026-10-02

PLOS ONE / Greenwood et al. · A Unique Resource Mutualism between Nepenthes rajah and Members of a Small Mammal CommunityAccessed: 2026-10-02

Royal Botanic Gardens, Kew · Nepenthes rajah: Kew Species Profile and IUCN CategoriesAccessed: 2026-10-02

Plant Ecology / van der Ent, Sumail and Clarke; James Cook University repository · Habitat differentiation of obligate ultramafic Nepenthes endemic to Mount Kinabalu and Mount TambuyukonAccessed: 2026-10-02

Sabah Parks Nature Journal (2024) · Species Richness and Composition of Alien Plant Species in Marai Parai, Kinabalu Park, MalaysiaAccessed: 2026-10-02

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