VU

Teer baardmos

Usnea fragilescens

Unknown

Overview

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

Usnea fragilescens 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 it requires continuous forest canopy and specific microclimatic conditions. Climate change compounds these pressures by altering precipitation patterns and increasing temperature extremes that disrupt the delicate moisture balance this lichen requires for survival.

Threat summary

Habitat

Usnea fragilescens grows exclusively on the bark of mature deciduous and coniferous trees in old-growth and semi-natural forests, requiring high humidity and clean air conditions. The species is typically found in montane and boreal forest ecosystems where it forms part of the epiphytic lichen community on tree trunks and branches.

TERRESTRIAL· major

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ringlavVU

ringlav

Evernia divaricata

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Frequently asked questions

Why is Teer baardmos classified as Vulnerable?
Teer baardmos 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. Usnea fragilescens 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 it requires continuous forest canopy and specific microclimatic conditions. Climate change compounds these pressures by altering precipitation patterns and increasing temperature extremes that disrupt the delicate moisture balance this lichen requires for survival.
Where does Teer baardmos live?
Teer baardmos 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 Teer baardmos?
The main threats to Teer baardmos 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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