Xanthomendoza oregana
Local name: Poelts væggelav
Photo: Wikimedia Commons (CC) via https://en.wikipedia.org/wiki/Xanthomendoza_oregana
Overview
A detailed profile for this species is sourced from the IUCN Red List of Threatened Species as assessments become available.
Xanthomendoza oregana faces significant pressure from air pollution, particularly nitrogen deposition and sulfur compounds that alter the chemical composition of its bark substrates. Urban development and forest management practices that remove old-growth trees eliminate the mature bark surfaces this lichen requires for establishment and growth. Climate change poses an additional threat through altered precipitation patterns and increased temperature extremes that stress both the lichen and its host trees.
Habitat
This crustose lichen grows exclusively on the bark of mature deciduous trees, particularly favoring oak, maple, and ash species in old-growth and semi-natural forest environments. It requires stable bark surfaces with specific pH conditions and is typically found in areas with moderate humidity and limited air pollution.
Other threatened species in Teloschistaceae
Threatened in Canada
Frequently asked questions
Why is Poelts væggelav classified as Vulnerable?
Where does Poelts væggelav live?
What are the main threats to Poelts væggelav?
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