Field evidence for an acid rain effect on lichens

Barkman, 1958 Ferry, 1973 Fowler, 1982, Rainfall acidity in Northern Britain, Nature, Lond., 297, 383, 10.1038/297383a0 Fritz-Sheridan, 1985, Impact of simulated acid rains on nitrogenase activity in Peltigera aphthosa and Peltigera polydactyla, Lichenologist, 17, 27, 10.1017/S0024282985000044 Gauslaa, 1985, The ecology of Lobarion pulmonariae and Parmelion caperate in Quercus-dominated forests in south-west Norway, Lichenologist, 17, 117, 10.1017/S0024282985000184 Gilbert, 1970, A biological scale for the estimation of sulphur dioxide pollution, New Phytol., 69, 629, 10.1111/j.1469-8137.1970.tb07614.x Hawksworth, 1970, Qualitative scale for estimating sulphur dioxide air pollution in England and Wales using epiphytic lichens, Nature, Lond., 227, 145, 10.1038/227145a0 House of Commons Environment Committee, 1984, Acid rain James, 1973, The effect of air pollutants other than hydrogen fluoride and sulphur dioxide on lichens, 143 Rose, 1976, Lichenological indicators of age and environmental continuity in woodlands, 279 Skye, 1968, Lichens and air pollution, Acta phytogeogr. suec., 52, 1 Warren Spring Laboratory, 1968 Watt Committee, 1984, Acid rain