VU

Powdery Saucer Lichen

Ochrolechia androgyna

Unknown

Overview

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

The Powdery Saucer Lichen faces severe decline from air pollution, particularly nitrogen deposition and sulfur compounds that alter its substrate chemistry and disrupt symbiotic relationships. Habitat fragmentation through deforestation and urban development has eliminated many suitable host trees, while climate change is shifting precipitation patterns beyond the species' tolerance range. Agricultural intensification has reduced the availability of old-growth forests where this slow-growing lichen can establish and persist.

Threat summary

Habitat

Ochrolechia androgyna grows on the bark of mature deciduous and coniferous trees in humid, old-growth forests with stable microclimates. The species requires trees with rough, stable bark and low levels of air pollution, typically found in undisturbed woodland environments with consistent moisture levels.

TERRESTRIAL· major

Other threatened species in Ochrolechiaceae

Tartaric Saucer LichenEN

Tartaric Saucer Lichen

Ochrolechia tartarea

Unknown
VU

wrattige tandpastakorst

Ochrolechia subviridis

Unknown
bleikkorkjeEN

bleikkorkje

Ochrolechia pallescens

Unknown
Fjeld-blegskivelavEN

Fjeld-blegskivelav

Ochrolechia frigida

Unknown

Frequently asked questions

Why is Powdery Saucer Lichen classified as Vulnerable?
Powdery Saucer Lichen is classified as Vulnerable because the population is declining and the species faces a high risk of extinction in the medium-term future if current pressures continue. The Powdery Saucer Lichen faces severe decline from air pollution, particularly nitrogen deposition and sulfur compounds that alter its substrate chemistry and disrupt symbiotic relationships. Habitat fragmentation through deforestation and urban development has eliminated many suitable host trees, while climate change is shifting precipitation patterns beyond the species' tolerance range. Agricultural intensification has reduced the availability of old-growth forests where this slow-growing lichen can establish and persist.
Where does Powdery Saucer Lichen live?
Powdery Saucer 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 Powdery Saucer Lichen?
The main threats to Powdery Saucer 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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