VU

Polyscias marchionensis

Declining

Overview

A detailed profile for this species is sourced from the IUCN Red List of Threatened Species as assessments become available.

Polyscias marchionensis faces severe pressure from habitat degradation across its limited range in the Marquesas Islands. The species is particularly vulnerable to invasive plant species that alter forest composition and compete for resources. Coastal development and agricultural expansion continue to fragment the remaining native forest patches where this endemic tree survives.

Threat summary

Habitat

This endemic tree species inhabits native forests and woodland areas across the Marquesas Islands in French Polynesia. It typically grows in mesic forest environments at various elevations, often in association with other native vegetation on volcanic soils.

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Cheirodendron forbesii

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Sciodaphyllum dolichostylum

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EN

Sciodaphyllum connatum

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Frequently asked questions

Why is Polyscias marchionensis classified as Vulnerable?
Polyscias marchionensis is classified as Vulnerable because the population is declining and the species faces a high risk of extinction in the medium-term future if current pressures continue. Polyscias marchionensis faces severe pressure from habitat degradation across its limited range in the Marquesas Islands. The species is particularly vulnerable to invasive plant species that alter forest composition and compete for resources. Coastal development and agricultural expansion continue to fragment the remaining native forest patches where this endemic tree survives.
Where does Polyscias marchionensis live?
Polyscias marchionensis occurs in across multiple regions. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Polyscias marchionensis?
The main threats to Polyscias marchionensis are ai-1, ai-2, ai-3, and ai-4. The full IUCN-classified threat record for this species is detailed on the species page.

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