VU

Abrothallus caerulescens

Unknown

Overview

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

Abrothallus caerulescens faces significant threats from air pollution and acid rain, which alter the chemistry of its host lichens and bark substrates. Climate change poses additional risks through shifting precipitation patterns and temperature regimes that affect both the lichen and its fungal host relationships. Habitat fragmentation in old-growth forests reduces available substrate and disrupts the complex ecological networks this parasitic fungus depends upon.

Threat summary

Habitat

This parasitic fungus inhabits old-growth and mature forests where it grows exclusively on specific lichen species, particularly those in the genus Ochrolechia. It requires stable, humid forest environments with minimal air pollution to maintain the delicate host-parasite relationships essential for its survival.

TERRESTRIAL· major

Frequently asked questions

Why is Abrothallus caerulescens classified as Vulnerable?
Abrothallus caerulescens 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. Abrothallus caerulescens faces significant threats from air pollution and acid rain, which alter the chemistry of its host lichens and bark substrates. Climate change poses additional risks through shifting precipitation patterns and temperature regimes that affect both the lichen and its fungal host relationships. Habitat fragmentation in old-growth forests reduces available substrate and disrupts the complex ecological networks this parasitic fungus depends upon.
Where does Abrothallus caerulescens live?
Abrothallus caerulescens 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 Abrothallus caerulescens?
The main threats to Abrothallus caerulescens 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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