Wart Lichen
EN

Wart Lichen

Pyrenula nitida

Unknown

Photo: Wikimedia Commons (CC) via https://en.wikipedia.org/wiki/Pyrenula_nitida

Overview

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

Pyrenula nitida faces severe decline due to air pollution and acid rain, which directly damage its sensitive thallus structure and disrupt the delicate chemical balance required for photosynthesis. Urban development and industrial activities have eliminated much of its historical range, while climate change alters the humid microclimatic conditions essential for this epiphytic lichen's survival on tree bark.

Threat summary

Habitat

This epiphytic lichen grows exclusively on the bark of mature deciduous trees in humid, temperate forests and well-established urban parks. It requires stable microclimatic conditions with consistent moisture levels and minimal air pollution exposure.

TERRESTRIAL· major

Other threatened species in Pyrenulaceae

Pyrenula occidentalisCR

Pyrenula occidentalis

Unknown
Pyrenula macrosporaEN

Pyrenula macrospora

Unknown
Pyrenula nitidellaEN

Pyrenula nitidella

Unknown
CR

Pyrenula coryli

Unknown

Frequently asked questions

Why is Wart Lichen classified as Endangered?
Wart Lichen is classified as Endangered — facing a very high risk of extinction in the wild — because population numbers are declining steeply and key habitats are under sustained pressure. Pyrenula nitida faces severe decline due to air pollution and acid rain, which directly damage its sensitive thallus structure and disrupt the delicate chemical balance required for photosynthesis. Urban development and industrial activities have eliminated much of its historical range, while climate change alters the humid microclimatic conditions essential for this epiphytic lichen's survival on tree bark.
Where does Wart Lichen live?
Wart Lichen 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 Wart Lichen?
The main threats to Wart Lichen 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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