barkzonlav
Enterographa crassa
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.
Photo: iNaturalist: (c) Valentin Hamon, some rights reserved (CC BY-NC), uploaded by Valentin Hamon
Taxonomy & Classification
Kingdom
Fungi
Phylum
Ascomycota
Class
Arthoniomycetes
Order
Arthoniales
Family
Roccellaceae
Genus
Enterographa
barkzonlav belongs to the family Roccellaceae, order Arthoniales, within the Arthoniomycetes class.
Species Profile
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.
Key Facts
Habitat & Distribution
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.
Threats
IUCN Red List: Endangered
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.
Air pollution and acid rain
Habitat loss and forest fragmentation
Atmospheric nitrogen deposition
Climate change affecting humidity and temperature regimes
Community Sightings
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Sources & Attribution
How to Cite
IUCN: IUCN (2025). The IUCN Red List of Threatened Species. Version 2025-1. Available at: https://www.iucnredlist.org. doi:10.2305/IUCN.UK.2025-1.RLTS
GBIF: GBIF.org (2025). GBIF Home Page. Available at: https://www.gbif.org
This page: SpeciesRadar (2025). barkzonlav (Enterographa crassa). SpeciesRadar: Intelligence for Earth's Biodiversity. Available at: https://speciesradar.org/species/barkzonlav