Epiphytic macrolichens in the forests of North-East Estonia
2000
Martin, L. | Martin, J. (Eurouniversity, Tallinn (Estonia))
Forty-five macrolichen species were registered on 29 forested sample plots in Laeaene- and Ida-Viru counties in North-East Estonia. Analysis of the macrolichen species distribution indicated and impact of air pollution on the epiphytic lichen cover. The presented distribution maps demonstrate that lichen species belonging to different ecological groups by substrate requirements respond differently to air pollution. Lichen species diversity was analysed by means of species richness, diferent diversity measures including the Shannon-Weaver Diversity Index, and characterised by the sum of species abundances. Alpha diversity of epiphytic macrolichens for the study area is 8.3 (s.d. 5.5), beta diversity 5.4, and the Shannon-Weaver Diversity Index varied from 0 to 1.189. Variations in the lichen community demonstrated the existence of a steep local air pollution gradient oriented from north-east to south-west
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