Nilgiri Tree Fern
CR

Nilgiri Tree Fern

Alsophila nilgirensis

Declining

Photo: Photo: (c) KRtreefern, some rights reserved (CC BY-NC), uploaded by KRtreefern

Overview

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

Alsophila nilgirensis faces severe population decline due to extensive deforestation and habitat fragmentation across the Western Ghats. Commercial logging, agricultural expansion, and infrastructure development have eliminated much of its native montane forest habitat. The species' slow growth rate and specific microclimate requirements make recovery particularly challenging, while remaining populations are increasingly isolated in small forest fragments vulnerable to edge effects and further degradation.

Threat summary

Habitat

This tree fern inhabits the montane evergreen forests of the Western Ghats, typically occurring at elevations between 1,200-2,000 meters in areas with high humidity and consistent moisture. It requires the specific microclimate conditions found in undisturbed forest understories, including filtered sunlight and protection from strong winds.

Wetlands (inland) - Permanent rivers/streams· major

Conservation measures underway

Resource & habitat protectionSpecies managementSpecies recoveryEx-situ conservationAwareness & communications

Frequently asked questions

Why is Nilgiri Tree Fern classified as Critically Endangered?
Nilgiri Tree Fern 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. Alsophila nilgirensis faces severe population decline due to extensive deforestation and habitat fragmentation across the Western Ghats. Commercial logging, agricultural expansion, and infrastructure development have eliminated much of its native montane forest habitat. The species' slow growth rate and specific microclimate requirements make recovery particularly challenging, while remaining populations are increasingly isolated in small forest fragments vulnerable to edge effects and further degradation.
Where does Nilgiri Tree Fern live?
Nilgiri Tree Fern occurs in India. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Nilgiri Tree Fern?
The main threats to Nilgiri Tree Fern are 1.1, 11.1, 11.2, and 2.1. The full IUCN-classified threat record for this species is detailed on the species page.

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