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Flaechenbestimmung von Flechten zur oekologischen Langzeitbeobachtung

, : Flaechenbestimmung von Flechten zur oekologischen Langzeitbeobachtung. Herzogia 15: 159-178

A procedure is presented, that makes it possible to observe the changes of the lichen covering of small investigation plots (20 X 20 cm) on tree barks and on even rock surfaces very accurately: On the area of 400 cm2, a quantitative registration of the coverage of the existing lichen thalli is carried out. A transparent foil of 20 X 20 cm is set onto the investigation area. After this the contours of the existing thalli are transferred onto the film with felt-tipped pens.

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