Grainy Shadow-crust Lichen
Hyperphyscia adglutinata
Overview
Grainy Shadow-crust Lichen (Hyperphyscia adglutinata) is a foliose lichen characterized by its grayish, granular surface texture and closely adhering thallus that forms thin, shadow-like crusts on substrates. This species plays a crucial ecological role as a pioneer colonizer and contributes to nutrient cycling and soil formation in its ecosystems.
Grainy Shadow-crust Lichen faces severe decline primarily due to air pollution, particularly nitrogen deposition and sulfur compounds that alter its substrate chemistry and disrupt its symbiotic relationships. Urban development and habitat fragmentation have eliminated many suitable bark substrates, while climate change is shifting precipitation patterns that affect the moisture-dependent reproductive cycles of this epiphytic species.
Habitat
Hyperphyscia adglutinata typically grows on the bark of deciduous trees, particularly favoring smooth-barked species in semi-open woodlands and parklands. It thrives in areas with moderate light exposure and consistent moisture levels, often found at intermediate heights on tree trunks where humidity remains relatively stable.
Other threatened species in Physciaceae
Frequently asked questions
Why is Grainy Shadow-crust Lichen classified as Endangered?
Where does Grainy Shadow-crust Lichen live?
What are the main threats to Grainy Shadow-crust Lichen?
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