Wirth, V. 2010. Ecological indicator values of lichens — enlarged and updated species list. — Herzogia 23: 229–248.

A new edition of the species list of ecological indicator values of lichens is presented. Values of the hitherto considered species have been checked and corrected where appropriate. Fifty-eight additional species have been included. Overall, indicator values for important climatic factors (light = L, temperature = T, continentality = K, moisture = F) and substrate properties (pH = R, eutrophication = N) are now available for 516 species. A procedure to assess the eco-climatic oceanity (KO) with the help of the indicator values is presented. Since the eco-climatic oceanity has a temperature and a moisture component, the indicator value of eco-climatic oceanity can be calculated with the formula KO = (10 - K F) : 2.