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The element concentration of the lichen species Alectoria fremontii and its substrate (bark of Pinus sihestris) were studied. It appeared that the content of all the investigated elements, except for vanadium, was higher in the lichen samples than that in the corresponding bark samples. Analysis-of-variance procedure has demonstrated that the concentration of N, P, S, Se, V, Hg and U in lichen samples appeared to change significantly in samples gathered from two different height-zones on the stems above ground level. However, this was not the case with the bark samples. The elements Se, V, Hg, U, Co and Mo determinations of the samples were performed by neutron activation methods.

zeitschrift für naturforschung c

Studies on the Chemistry of Lichens, XX. The Element Concentration of the Lichen Species Alectoria fremontii and Its A ssociated Bark Substrate of Pinus silvestris *