VU

Bryoria tenuis

Local name: långt broktagel

Unknown

Overview

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

Bryoria tenuis faces severe decline due to air pollution, particularly sulfur dioxide and nitrogen compounds that directly damage its sensitive thallus structure. The species is extremely vulnerable to habitat fragmentation as old-growth forests are cleared, eliminating the mature trees it requires as substrates. Climate change compounds these pressures by altering precipitation patterns and increasing temperature stress in its montane habitats.

Threat summary

Habitat

This epiphytic lichen grows exclusively on the bark of old conifers in mature boreal and montane forests, particularly favoring spruce and fir trees in humid, unpolluted environments. It requires stable microclimatic conditions with consistent moisture and clean air, typically found at elevations between 500-1500 meters in Scandinavian forests.

TERRESTRIAL· major

Other threatened species in Parmeliaceae

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Punctelia jeckeri

Unknown
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Teer baardmos

Usnea fragilescens

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VU

Oldgrowth Rag Lichen

Platismatia norvegica

Unknown
Hypotrachyna laevigataVU

Hypotrachyna laevigata

Unknown

Frequently asked questions

Why is långt broktagel classified as Vulnerable?
långt broktagel 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. Bryoria tenuis faces severe decline due to air pollution, particularly sulfur dioxide and nitrogen compounds that directly damage its sensitive thallus structure. The species is extremely vulnerable to habitat fragmentation as old-growth forests are cleared, eliminating the mature trees it requires as substrates. Climate change compounds these pressures by altering precipitation patterns and increasing temperature stress in its montane habitats.
Where does långt broktagel live?
långt broktagel 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 långt broktagel?
The main threats to långt broktagel 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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