VU

fransrosettlav

Physcia leptalea

Unknown

Overview

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

Physcia leptalea faces severe decline due to air pollution, particularly nitrogen deposition and sulfur dioxide emissions that alter the chemical composition of its bark substrates. Urban expansion and industrial development have eliminated many of its traditional habitats, while climate change is shifting precipitation patterns that affect the moisture regimes essential for this lichen's survival. The species' slow growth rate and limited dispersal ability make recovery from population losses extremely difficult.

Threat summary

Habitat

This lichen species grows primarily on the bark of deciduous trees in old-growth and mature forests, particularly favoring oak, beech, and maple trees with rough, furrowed bark. It requires specific microclimate conditions with moderate humidity and minimal air pollution, typically found in undisturbed woodland environments away from urban and industrial areas.

TERRESTRIAL· major

Other threatened species in Physciaceae

Star Rosette LichenEN

Star Rosette Lichen

Physcia stellaris

Unknown
pudrad rosettlavVU

pudrad rosettlav

Physcia magnussonii

Unknown
VU

raggkranslav

Phaeophyscia kairamoi

Unknown
VU

Powdered Fringe Lichen

Heterodermia speciosa

Unknown

Frequently asked questions

Why is fransrosettlav classified as Vulnerable?
fransrosettlav 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. Physcia leptalea faces severe decline due to air pollution, particularly nitrogen deposition and sulfur dioxide emissions that alter the chemical composition of its bark substrates. Urban expansion and industrial development have eliminated many of its traditional habitats, while climate change is shifting precipitation patterns that affect the moisture regimes essential for this lichen's survival. The species' slow growth rate and limited dispersal ability make recovery from population losses extremely difficult.
Where does fransrosettlav live?
fransrosettlav 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 fransrosettlav?
The main threats to fransrosettlav 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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