tSimultaneous assessment of epiphytic lichen diversity by teams from six European countries, followingthe procedures defined in the recently adopted European standard, revealed several sources of error (e.g.location of plot, selection of... more
tSimultaneous assessment of epiphytic lichen diversity by teams from six European countries, followingthe procedures defined in the recently adopted European standard, revealed several sources of error (e.g.location of plot, selection of trees, identification of taxa). Routine training and further improvement ofStandard Operating Procedures (SOPs) are suggested to boost the harmonization process of the Europeanguidelines, which promises to be an effective tool for standardizing the assessment of lichen diversity.