Series: Field Studies Council Occasional Publication Volume: 74
By: Wolseley, James and Alexander
8 pages, Col illus, foldout chart
This key is designed to enable you to identify lichens found on twigs and use them to assess local atmospheric conditions. This key indicates which lichens are acid-tolerant and nitrogen- tolerant (2 of the major pollutants that affect lichens) and also indicates lichens that are associated with unpolluted sites.
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