CR

Dendroseris berteroana

Unknown

Overview

Sonchus berteroanus, synonym Dendroseris berteroana, is a species of flowering plant in the family Asteraceae. It is found only in the Juan Fernández Islands of Chile. It is threatened by habitat loss.

Dendroseris berteroana faces severe threats from invasive plant species that outcompete this endemic tree for resources and space on Juan Fernández Islands. Habitat degradation from introduced herbivores, particularly goats and rabbits, has severely impacted the native forest ecosystems where this species naturally occurs. The extremely small population size makes the species highly vulnerable to stochastic events and genetic bottlenecks that could drive it to extinction.

Threat summary

Habitat

This endemic tree species inhabits the native forests of the Juan Fernández Islands, specifically on Robinson Crusoe Island (formerly Más a Tierra). It grows in montane forest ecosystems at elevations between 400-600 meters, typically in areas with high humidity and frequent cloud cover.

Conservation measures underway

Site/area protection

Other threatened species in ASTERACEAE

EN

Bidens cosmoides

Declining
VU

Piptolepis monticola

Unknown
Libanothamnus parvulusCR

Libanothamnus parvulus

Declining
EN

Gynoxys neovelutina

Declining

Frequently asked questions

Why is Dendroseris berteroana classified as Critically Endangered?
Dendroseris berteroana 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. Dendroseris berteroana faces severe threats from invasive plant species that outcompete this endemic tree for resources and space on Juan Fernández Islands. Habitat degradation from introduced herbivores, particularly goats and rabbits, has severely impacted the native forest ecosystems where this species naturally occurs. The extremely small population size makes the species highly vulnerable to stochastic events and genetic bottlenecks that could drive it to extinction.
Where does Dendroseris berteroana live?
Dendroseris berteroana 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 Dendroseris berteroana?
The main threats to Dendroseris berteroana are 2.3, 8.1, ai-1, and ai-2. The full IUCN-classified threat record for this species is detailed on the species page.

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