Abstract
The monthly trees and shrubs pollen (AP) content of the atmosphere during a whole annual period is analyzed. Thirty airborne pollen types have been identified. Most of them come from cultivated plants flowering in late winter-early spring. Thereby the annual peak is recorded in October. The highest frequencies recorded are those ofFraxinus americana, Acer negundo, Platanus spp. andMorus nigra. A second minor peak is recorded in March, and is mainly due toCasuarina spp./Myrica spp. pollen. Aeropalynological data are discussed and correlated with phytogeographical, phenological and meteorological parameters.
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