Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Laurisilva of Madeira' has mentioned 'Pressure' in the following places:
Occurrence Sentence Text Source
[7] In the absence of strong environmental selective pressure, the number of species sharing the arboreal stratum is high, although not reaching the diversity of tropical forests; nearly 100 tree species have been described in the laurisilva rainforest of Misiones (Argentina), about 20 in the Canary Islands.
With sheer cliffs beside narrow levadas, great care is needed to both to protect the forest and to provide for safe visitor access, especially in relation to possible increases in visitor pressure.