Dendroseris marginata
CR

Dendroseris marginata

Unknown

Photo: Wikimedia Commons (CC BY-SA) — Species of flowering plant

Overview

Sonchus marginatus, synonym Dendroseris marginata, 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 marginata faces severe threats from invasive plant species that outcompete native vegetation and alter ecosystem dynamics on Juan Fernández Islands. Habitat degradation from introduced herbivores, particularly goats and rabbits, has severely impacted the endemic flora communities where this species occurs. The extremely limited population size and restricted range make the species highly vulnerable to stochastic events and genetic bottlenecks.

Threat summary

Habitat

This endemic species inhabits the native forest remnants and shrubland areas of the Juan Fernández Islands, typically growing in volcanic soils at moderate elevations. It occurs in association with other endemic flora in the increasingly fragmented native vegetation communities of this isolated archipelago.

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 marginata classified as Critically Endangered?
Dendroseris marginata 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 marginata faces severe threats from invasive plant species that outcompete native vegetation and alter ecosystem dynamics on Juan Fernández Islands. Habitat degradation from introduced herbivores, particularly goats and rabbits, has severely impacted the endemic flora communities where this species occurs. The extremely limited population size and restricted range make the species highly vulnerable to stochastic events and genetic bottlenecks.
Where does Dendroseris marginata live?
Dendroseris marginata 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 marginata?
The main threats to Dendroseris marginata 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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