Studies on Epiphytic Lichens and Pine Bark in the Vicinity of a Cement Works in northern Finland

1989

S. 301-310

3 Abb., 5 Tab., 14 Lit. Ang.

Unselbständiges Werk

200040761

Silva Fennica 1989 : a quaterly journal of forest science ; 23(4), S. 301-310

The element content (Ca, Mg, K, Na, Fe, Mn, Zn, Cu, Pb, S) of pine (Pinus sylvestris) bark and Bryoria lichens, as well as the occurrence and coverage of epiphytic lichens and the length of Bryoria species, were studied in the vicinity of Kolari cement works, NW Finland. Fruticose Bryoria species had the highest coverage on pine trunks at a distance of 2 km or more from the cement works. At a distance of 1 km the foliose - or even crustose - Parmeliopsis species were most abundant, while nearer to the works lichens were almost completely absent. The length of Bryoria was reduced at distances of less than 2 km from the cement works. The calcium content in Bryoria species increased very steeply close to the works; by a factor of 60 at a distance of 1 km compared to 16 km. No corresponding increase in other elements was observed near the cement works. All the elements studied in pine bark showed a significant negative correlation with distance, and a significant positive correlation with the calculated dust deposition levels. There were only minor differences between the north and south of the pine trunks, or the side dacing or away from the works. Pine bark analysis is recommended for element accumulation studies.