Enterographa crassa
EN

Enterographa crassa

Unknown

Photo: iNaturalist: (c) Valentin Hamon, some rights reserved (CC BY-NC), uploaded by Valentin Hamon

Overview

Enterographa crassa, commonly known as barkzonlav, is a crustose lichen species that forms thin, grayish-white to pale yellow crusts on tree bark. This lichen plays a crucial ecological role as a pioneer species in forest ecosystems, contributing to nutrient cycling and providing microhabitat for invertebrates while serving as an indicator of air quality.

Enterographa crassa faces severe decline primarily due to habitat loss from deforestation and air pollution affecting its lichen substrate requirements. Climate change and atmospheric nitrogen deposition are altering the specific microenvironmental conditions this species requires for survival.

Threat summary

Habitat

Barkzonlav typically colonizes the bark of mature deciduous and coniferous trees in temperate and boreal forests, showing preference for trees with slightly acidic to neutral bark pH. The species is most commonly found in old-growth forest stands and well-established secondary forests where air quality remains relatively pristine.

TERRESTRIAL· major

Frequently asked questions

Why is Enterographa crassa classified as Endangered?
Enterographa crassa 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. Enterographa crassa faces severe decline primarily due to habitat loss from deforestation and air pollution affecting its lichen substrate requirements. Climate change and atmospheric nitrogen deposition are altering the specific microenvironmental conditions this species requires for survival.
Where does Enterographa crassa live?
Enterographa crassa 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 Enterographa crassa?
The main threats to Enterographa crassa 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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