EN

kalkskjold

Glypholecia scabra

Unknown

Overview

Glypholecia scabra is a crustose lichen species that forms thin, grayish to brownish crusts on calcareous substrates. This inconspicuous lichen plays an important ecological role in nutrient cycling and provides microhabitat for small invertebrates in limestone ecosystems.

Glypholecia scabra faces severe decline primarily due to air pollution and habitat degradation affecting the specific environmental conditions required for this lichen species. The species is particularly vulnerable to changes in air quality and substrate availability in its specialized coastal and rocky habitats.

Threat summary

Habitat

Glypholecia scabra grows exclusively on calcareous rocks, limestone cliffs, and old mortar of stone walls in areas with relatively clean air. It typically occurs in semi-shaded to exposed situations on vertical or near-vertical surfaces where calcium carbonate is readily available.

TERRESTRIAL· major

Other threatened species in Acarosporaceae

VU

oslosprekklav

Acarospora impressula

Unknown
EN

Acarospora anomala

Unknown
gyttrad kalkspricklavVU

gyttrad kalkspricklav

Acarospora cervina

Unknown
donker steenschubjeVU

donker steenschubje

Acarospora nitrophila

Unknown

Frequently asked questions

Why is kalkskjold classified as Endangered?
kalkskjold is classified as Endangered — facing a very high risk of extinction in the wild — because population numbers are declining steeply and key habitats are under sustained pressure. Glypholecia scabra faces severe decline primarily due to air pollution and habitat degradation affecting the specific environmental conditions required for this lichen species. The species is particularly vulnerable to changes in air quality and substrate availability in its specialized coastal and rocky habitats.
Where does kalkskjold live?
kalkskjold 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 kalkskjold?
The main threats to kalkskjold 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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