The limited light conditions of dense young forests can severely decrease the growth of Pseudocyphellaria crocata compared to more open , old - growth forests .
The excess of light from clearcuts can also cause damage to the lichen .
The limited light conditions of dense young forests can severely decrease the growth of Pseudocyphellaria crocata compared to more open , old - growth forests , and the excess of light from clearcuts can also cause damage to the lichen .