Henderson-Sellers, A/ Seaward, MRD 1979: Monitoring lichen reinvasion of ameliorating environments. - Environmental Pollution19: 207-213. [RLL List # 104-47 / Rec.# 8246] Keywords: AIR POLLUTION/ REINVASION/ RECOLONIZATION/ SO2/ WEST YORKSHIRE/ BRITISH ISLES/ LECANORA
Abstract: 1 table. 6 figures. [Lecanora muralis monitored in West Yorkshire. "The results indicate that the response to improved atmospheric conditions is slow and difficult to model in terms of a simple threshold value of sulphur dioxide alone. It appears that the lichen's response becomes dependent upon other parameters as the atmospheric pollutant levels drop."]