Variations in pollen deposition of some plant taxa in Lublin (Poland) and in Skien (Norway)

This paper analyses pollen deposition in Lublin (Poland) and Skien (Norway). The studies were conducted in the years 1999 and 2000 using the gravimetric method and a Durham sampler. The study results varied both between years and cities. 10 more plant taxa were identified in Lublin than in Skien. In Lublin the highest airborne pollen concentrations were recorded in April, whereas in Skien in May and July. Betula, Pinaceae and Poaceae were the dominant taxa at the sampling site in Poland, while in Norway these were Pinaceae, Betula and Urtica. During the period of two years, annual pollen sums for most taxa were higher in the conditions of Poland, and the maximum pollen concentrations of Betula and Poaceae were higher in Poland, while for Pinaceae the pollen counts were higher in Norway.