Frosted glass-whiskers (Sclerophora peronella) COSEWIC assessment and status report: chapter 8

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Limiting Factors and Threats

Sclerophora peronella seems to have a preference for the environmental stability associated with older established forests. Therefore habitat destruction from logging of old forests is a potential threat. Given the sensitivity of this and other calicioid species to disturbance--including acid rain and other atmospheric pollutants that affect lichens generally, the ultimate fate of this species depends in large part on the protection and management of the type of forest ecosystems in which it tends to occur. Sclerophora peronella is also probably confined to coastal or near-coastal regions, owing to the known frost sensitivity of its alga partner, Trentepohlia.