Abstract
The sensitivity of the lichens to SO2 is closely dependent upon the water potential and the pH, both of the thallus and the substrate. When the water potential is lowered the SO2 uptake is reduced and with it the injury. Dried thalli survive high SO2 concentrations in their surroundings without damage. The damage caused to the lichens by the Na2 S2 O5 solutions and the treatment with buffer solutions and subsequent SO2 fumigation is dependent upon the pH of the medium. At a low pH the damaging effect is much more pronounced than at high pH. This can be interpreted on the one hand as due to the concentration of damaging ions, which changes according to the degree of dissociation of the solution, which is pH dependent. On the other hand SO2 causes a lowering of pH which can damage the lichen, too.
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© 1975 Springer Science+Business Media Dordrecht
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Türk, R., Wirth, V. (1975). Der Einfluss des Wasserzustandes und des Ph-Wertes Auf die SO2-Schädigung von Flechten. In: Verhandlungen der Gesellschaft für Ökologie Erlangen 1974. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-4521-5_15
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DOI: https://doi.org/10.1007/978-94-017-4521-5_15
Publisher Name: Springer, Dordrecht
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