VU

liten havstulpanlav

Thelotrema suecicum

Unknown

Overview

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

Thelotrema suecicum faces severe decline due to air pollution, particularly nitrogen deposition and sulfur compounds that alter bark chemistry and disrupt the delicate pH balance required for lichen survival. Habitat fragmentation from urban development and intensive forestry practices has reduced suitable old-growth forest areas, while climate change is shifting precipitation patterns that affect the humid microenvironments this species requires.

Threat summary

Habitat

This crustose lichen species inhabits the bark of old deciduous trees, particularly in humid coastal and montane forests of Scandinavia. It requires stable, mature forest environments with consistent moisture levels and minimal air pollution.

TERRESTRIAL· major

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Phaeographis leucocheila

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Redingeria glyphica

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Myriotrema fragile

Unknown

Frequently asked questions

Why is liten havstulpanlav classified as Vulnerable?
liten havstulpanlav 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. Thelotrema suecicum faces severe decline due to air pollution, particularly nitrogen deposition and sulfur compounds that alter bark chemistry and disrupt the delicate pH balance required for lichen survival. Habitat fragmentation from urban development and intensive forestry practices has reduced suitable old-growth forest areas, while climate change is shifting precipitation patterns that affect the humid microenvironments this species requires.
Where does liten havstulpanlav live?
liten havstulpanlav 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 liten havstulpanlav?
The main threats to liten havstulpanlav 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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