Abstract
A complex database on the lichens of Italy was used to combine ecological indicator values assigned to each species (pH, eutrophication, light and aridity), in such a way as to simulate `virtual habitats' from a beech forest of northern Italy. For each habitat, a list of species was obtained (`virtual releve'). A matrix of real and virtual releves was submitted to classification and ordination, obtaining six main community-types, all of which include both real and virtual releves. Two ordinations of species were carried out, one on the matrix of real releves, the other on that of virtual releves: their comparison shows that the consistency and the resolving power of the indicator values was high, but it also permits to detect and correct some errors. The results indicate a high predictivity of the indicator values for constructing ecological scenarios.
Published Version
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