CR

Casearia brassii

Declining

Overview

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

Casearia brassii faces severe threats from deforestation and habitat conversion in its limited range within Papua New Guinea's lowland forests. The species' extremely restricted distribution makes it particularly vulnerable to localized disturbances, with logging activities and agricultural expansion representing the primary drivers of population decline. Climate change poses an additional long-term threat through altered precipitation patterns and temperature increases that could affect the specialized forest ecosystems this species depends upon.

Threat summary

Habitat

Casearia brassii is endemic to the lowland tropical rainforests of Papua New Guinea, typically occurring in primary forest environments at elevations below 500 meters. The species requires intact forest canopy and appears to be associated with specific soil and moisture conditions found in undisturbed rainforest ecosystems.

Forest - Subtropical/tropical moist lowland· major

Conservation measures underway

Species recoveryEx-situ conservation

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Frequently asked questions

Why is Casearia brassii classified as Critically Endangered?
Casearia brassii is classified as Critically Endangered — facing an extremely high risk of extinction in the wild — because population sizes are very small, declining sharply, or restricted to a tiny range. Casearia brassii faces severe threats from deforestation and habitat conversion in its limited range within Papua New Guinea's lowland forests. The species' extremely restricted distribution makes it particularly vulnerable to localized disturbances, with logging activities and agricultural expansion representing the primary drivers of population decline. Climate change poses an additional long-term threat through altered precipitation patterns and temperature increases that could affect the specialized forest ecosystems this species depends upon.
Where does Casearia brassii live?
Casearia brassii occurs in Papua New Guinea. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Casearia brassii?
The main threats to Casearia brassii 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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