VU

dotted lichen

Bacidia rosella

Unknown

Overview

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

Rosa lundlav faces severe pressure from air pollution, particularly nitrogen deposition and sulfur compounds that alter the chemical composition of its bark substrates. Urban development and forest management practices that favor younger tree stands reduce the availability of suitable old-growth bark habitats. Climate change compounds these threats by altering precipitation patterns and increasing temperature stress on both the lichen and its host trees.

Threat summary

Habitat

Rosa lundlav grows exclusively on the bark of old deciduous trees, particularly favoring mature oak, ash, and maple species in humid forest environments. The species requires stable microclimatic conditions with consistent moisture levels and minimal air pollution exposure.

TERRESTRIAL· major

Other threatened species in Ramalinaceae

EN

Laurer's Catillaria

Megalaria laureri

Unknown
VU

Megalaria pulverea

Unknown
CR

Ramalina protensa

Unknown
circumspect dotted lichenCR

circumspect dotted lichen

Bacidia circumspecta

Unknown

Threatened in Austria

VU

Lepiota echinella

Unknown
EN

Lyophyllum deliberatum

Unknown
VU

Large Tree-chernes

Dendrochernes cyrneus

Unknown
EN

Pipizella nigriana

Unknown

Frequently asked questions

Why is dotted lichen classified as Vulnerable?
dotted lichen 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. Rosa lundlav faces severe pressure from air pollution, particularly nitrogen deposition and sulfur compounds that alter the chemical composition of its bark substrates. Urban development and forest management practices that favor younger tree stands reduce the availability of suitable old-growth bark habitats. Climate change compounds these threats by altering precipitation patterns and increasing temperature stress on both the lichen and its host trees.
Where does dotted lichen live?
dotted lichen occurs in Austria, Bermuda, Bulgaria, Canada, Costa Rica, and Croatia (plus 26 other countries). Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to dotted lichen?
The main threats to dotted lichen 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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