CR

Dendroseris regia

Unknown

Overview

Sonchus regius, synonym Dendroseris regia, is a species of flowering plant in the family Asteraceae. It is endemic to the Juan Fernández Islands of Chile. It is threatened by habitat loss.

Dendroseris regia faces severe threats from invasive plant species that outcompete this endemic tree for resources and space on Robinson Crusoe Island. Habitat degradation from introduced herbivores, particularly goats and rabbits, has severely impacted the native forest ecosystem where this species occurs. The extremely small population size makes the species highly vulnerable to stochastic events and genetic bottlenecks, while climate change poses additional risks to its restricted montane habitat.

Threat summary

Habitat

Dendroseris regia is endemic to Robinson Crusoe Island in the Juan Fernández archipelago, where it inhabits native montane forests at elevations between 400-600 meters. The species grows in humid forest environments characterized by endemic tree ferns and other native vegetation typical of the island's unique temperate oceanic climate.

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 regia classified as Critically Endangered?
Dendroseris regia 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 regia faces severe threats from invasive plant species that outcompete this endemic tree for resources and space on Robinson Crusoe Island. Habitat degradation from introduced herbivores, particularly goats and rabbits, has severely impacted the native forest ecosystem where this species occurs. The extremely small population size makes the species highly vulnerable to stochastic events and genetic bottlenecks, while climate change poses additional risks to its restricted montane habitat.
Where does Dendroseris regia live?
Dendroseris regia 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 regia?
The main threats to Dendroseris regia 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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