VU

Bacidia friesiana

Local name: fläderlundlav

Unknown

Overview

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

Bacidia friesiana faces severe decline due to air pollution, particularly nitrogen deposition and sulfur compounds that alter the chemical composition of its bark substrates. Forest management practices that favor younger tree stands reduce the availability of mature bark surfaces essential for this lichen's establishment. Climate change compounds these pressures by altering moisture regimes and temperature patterns that affect both the lichen and its host trees.

Threat summary

Habitat

This epiphytic lichen grows exclusively on the bark of mature deciduous trees, particularly favoring old oak, ash, and maple trees in ancient woodlands and parklands. It requires stable, humid microclimates with minimal air pollution and thrives in areas with consistent moisture levels and filtered light conditions.

TERRESTRIAL· major

Other threatened species in Ramalinaceae

CR

Ramalina protensa

Unknown
VU

Kornet grenlav

Ramalina polymorpha

Unknown
VU

kristallundlav

Bacidia absistens

Unknown
VU

Megalaria pulverea

Unknown

Frequently asked questions

Why is fläderlundlav classified as Vulnerable?
fläderlundlav 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. Bacidia friesiana faces severe decline due to air pollution, particularly nitrogen deposition and sulfur compounds that alter the chemical composition of its bark substrates. Forest management practices that favor younger tree stands reduce the availability of mature bark surfaces essential for this lichen's establishment. Climate change compounds these pressures by altering moisture regimes and temperature patterns that affect both the lichen and its host trees.
Where does fläderlundlav live?
fläderlundlav 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 fläderlundlav?
The main threats to fläderlundlav 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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