ringlav
VU

ringlav

Evernia divaricata

Unknown

Photo: Wikimedia Commons (CC) via https://en.wikipedia.org/wiki/Evernia_divaricata

Overview

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

Ringlav faces severe decline due to air pollution, particularly sulfur dioxide and nitrogen compounds that accumulate in its thallus and disrupt photosynthesis. Habitat fragmentation from deforestation and urban development has reduced suitable host trees, while climate change alters moisture patterns essential for this lichen's survival. Industrial emissions and acid rain continue to degrade air quality across its range, making previously suitable habitats uninhabitable.

Threat summary

Habitat

Ringlav grows on the bark of deciduous trees, particularly oak and maple, in temperate forests with high humidity and clean air. This epiphytic lichen requires stable microclimates with consistent moisture levels and minimal air pollution to establish and maintain healthy populations.

Other threatened species in Parmeliaceae

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Hypotrachyna laevigataVU

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Frequently asked questions

Why is ringlav classified as Vulnerable?
ringlav 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. Ringlav faces severe decline due to air pollution, particularly sulfur dioxide and nitrogen compounds that accumulate in its thallus and disrupt photosynthesis. Habitat fragmentation from deforestation and urban development has reduced suitable host trees, while climate change alters moisture patterns essential for this lichen's survival. Industrial emissions and acid rain continue to degrade air quality across its range, making previously suitable habitats uninhabitable.
Where does ringlav live?
ringlav 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 ringlav?
The main threats to ringlav 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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