Pincushion Shadow Lichen
Phaeophyscia constipata
Overview
A detailed profile for this species is sourced from the IUCN Red List of Threatened Species as assessments become available.
Phaeophyscia constipata faces severe decline due to air pollution, particularly nitrogen deposition and sulfur dioxide emissions that alter the chemical composition of its bark substrates. Urban development and industrial activities have eliminated many suitable host trees, while climate change is shifting precipitation patterns that affect the delicate moisture balance this lichen requires. Agricultural intensification has reduced the availability of old-growth trees with appropriate bark chemistry in rural landscapes.
Habitat
This crustose lichen grows exclusively on the bark of deciduous trees, particularly favoring species with nutrient-rich, slightly basic bark chemistry such as ash, elm, and maple. It typically occurs in areas with moderate air humidity and is sensitive to atmospheric pollution levels.
Other threatened species in Physciaceae
Frequently asked questions
Why is Pincushion Shadow Lichen classified as Vulnerable?
Where does Pincushion Shadow Lichen live?
What are the main threats to Pincushion Shadow Lichen?
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