Meteorologinių sąlygų įtaka Alnus, Be tula ir Corylus žiedadulkių sklaidai
The Effect of Meteorological Factors on Alnus, Betula and Corylus Airborne Pollen Dispersal

Summary/Abstract: A development phase of monocarpic and polycarpic plants when generative organs and fruits are forming is exclusive because in the time of male gametophyte (pollen) formation, a part of human population shows non-typic reactions to biologic pollution of the athmosphere. Outbreaks of allergy are considered to be closely related to the dynamism of meteorological elements. Comparison of a meteorological situation with aerobiological monitoring data obtained by Šiauliai University creates a background for more precise prognostication of pollen quantity in the air and qualitative information regarding an aerobiological situation improving the life quality of alergy-sensitive people. Due to this reason pollen monitoring was performed in Klaip_da and Šiauliai in 2004. During it Alnus, Betula and Corylus concentrations in the air were evaluated using volumetric Hirst method. The influence of temperature, sunlight hours per day, wind direction, precipitation and relative humidity on the studied allergic pollen concentrations in the air were evaluated. Pollen quantity in Klaip_da and Šiauliai was positively correlated with such meteorological parameters as sunlit hours per day, temperature and negatively – with relative humidity and precipitation. Pollen peaks were recorded in days of similar meteorological conditions. A strong effect of relative humidity was noted on the initiation of birch pollen season. Wind direction was most significant in Klaip_da – 50% of all pollen during the season was counted during the days with the Eastern wind

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