7 ). Negative relationship between the year of observation and the pollen season start was found for Plantago , Poaceae, Populus, and Quercus , this means that the pollen seasons started earlier in the recent years (Table 1 ). For most of the studied taxa, an increasing trend in annual pollen totals was observed across the observational period.
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The pollen season dynamics and the relationship among some season parameters (start, end, annual total, season phases) in Kraków, Poland, 1991-2008.
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