Comparison of Alnus, Corylus and Betula pollen counts in Lublin (Poland) andSkien (Norway).
Krystyna Piotrowska 1 1 - Department of Botany, Agricultural University, Akademicka 15, 20-950 Lublin,Poland. firstname.lastname@example.org Ann Agric Environ Med 2004; 11 (2): ICID: 142667
Symptoms of pollen allergy in springtime in Middle and Northern Europeare mainly caused by pollen grains of birch, hazel and alder. The aim of the present study was the pollenfall comparison of the mentioned taxa in Lublin (Poland) and Skien (Norway). These sites are locatedapproximately 1,200 km away apart by air. The pollen monitoring was carried out by gravimetric methodin 1999-2000. The start and end of pollen seasons were defined by the 90% method. The beginning of pollenseasons for Corylus and Betula were observed 1-3 weeks earlier in Lublin than in Skien, but pollen grainsof Alnus appeared simultaneously in both towns. In 1999, annual totals of Alnus, Corylus and Betula pollengrains were considerably less numerous in Skien than in Lublin. No important differences were observedamong the pollen fall amounts of the mentioned taxa in 2000. The maximum values of pollen grains weredefined in different terms. The results of investigations differed as regards the years compared as wellas the sites.