geelberijpt boomspijkertje
VU

geelberijpt boomspijkertje

Calicium adspersum

Unknown

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

Overview

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

Calicium adspersum faces significant pressure from air pollution, particularly nitrogen deposition and sulfur compounds that alter bark chemistry and reduce suitable substrate availability. Forest management practices that favor young, smooth-barked trees over mature specimens with the rough, nutrient-rich bark this species requires have substantially reduced habitat quality. Climate change compounds these threats by altering moisture regimes and potentially shifting the geographic range of suitable host trees beyond the lichen's dispersal capabilities.

Threat summary

Habitat

This crustose lichen species grows exclusively on the rough, nutrient-rich bark of mature deciduous trees, particularly favoring old oak, ash, and maple trees in temperate European forests. It requires specific microclimate conditions with moderate humidity and low levels of air pollution, typically found in well-established woodland ecosystems with minimal disturbance.

TERRESTRIAL· major

Other threatened species in Caliciaceae

Buellia schaereriEN

Buellia schaereri

Unknown
VU

jordskivlav

Buellia epigaea

Unknown
Calicium trachylioidesCR

Calicium trachylioides

Unknown
CR

Buellia violaceofusca

Unknown

Frequently asked questions

Why is geelberijpt boomspijkertje classified as Vulnerable?
geelberijpt boomspijkertje 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. Calicium adspersum faces significant pressure from air pollution, particularly nitrogen deposition and sulfur compounds that alter bark chemistry and reduce suitable substrate availability. Forest management practices that favor young, smooth-barked trees over mature specimens with the rough, nutrient-rich bark this species requires have substantially reduced habitat quality. Climate change compounds these threats by altering moisture regimes and potentially shifting the geographic range of suitable host trees beyond the lichen's dispersal capabilities.
Where does geelberijpt boomspijkertje live?
geelberijpt boomspijkertje 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 geelberijpt boomspijkertje?
The main threats to geelberijpt boomspijkertje 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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