EN

njurlavsknapp

Plectocarpon nephromeum

Unknown

Overview

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

Plectocarpon nephromeum faces severe decline due to air pollution and acid rain, which directly damage its sensitive lichen thallus and disrupt the delicate chemical balance required for photosynthesis. Forest fragmentation and habitat loss from logging and urban development have eliminated many of its host trees and reduced the continuous forest canopy coverage essential for maintaining optimal humidity levels. Climate change compounds these pressures by altering precipitation patterns and increasing temperature extremes that stress both the lichen and its substrate trees.

Threat summary

Habitat

This crustose lichen grows exclusively on the bark of old-growth coniferous trees, particularly spruce and fir, in humid boreal and montane forests. It requires stable microclimatic conditions with high air humidity and minimal disturbance, typically found in mature forest stands with continuous canopy cover.

Other threatened species in Lecanographaceae

VU

lunglavsknapp

Plectocarpon lichenum

Unknown
EN

violettbrun skivlav

Lecanographa amylacea

Unknown
EN

skrovellavsknapp

Plectocarpon scrobiculatae

Unknown
daggklotterlavCR

daggklotterlav

Lecanographa lyncea

Unknown

Frequently asked questions

Why is njurlavsknapp classified as Endangered?
njurlavsknapp 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. Plectocarpon nephromeum faces severe decline due to air pollution and acid rain, which directly damage its sensitive lichen thallus and disrupt the delicate chemical balance required for photosynthesis. Forest fragmentation and habitat loss from logging and urban development have eliminated many of its host trees and reduced the continuous forest canopy coverage essential for maintaining optimal humidity levels. Climate change compounds these pressures by altering precipitation patterns and increasing temperature extremes that stress both the lichen and its substrate trees.
Where does njurlavsknapp live?
njurlavsknapp 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 njurlavsknapp?
The main threats to njurlavsknapp 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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