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The phenology of flowering and fluctuations of airborne pollen concentrations of selected trees in Poznan, 2003-2004

100%

Stach A., Kluza-Wieloch M., Zientarska A.

Acta Agrobotanica

2006

tom 59

nr 1

The aim of the study was to describe the relationships between the flowering phase of selected tree species, whose pollen is known to be allergenic, and fluctuations in the pollen in the air, and to use results obtained for making allergological forecasts. Studies were conducted of five tree taxa: Populus, Ulmus, Salix, Aesculus, and Tilia, in the years 2003-2004. Aeropalinological analyses concerned the above mentioned genera, while in phenological studies specific species were investigated, i.e. the most common representatives of a given genus found in Poland, that is Populus wilsonii, Ulmus laevis Pall. C. K.Schneid., Salix caprea L., Aesculus hippocastanum L. and Tilia cordata Mill. Aerobiological monitoring was performed using a the volumetric method and phenological observations of flowering phases were made according to the Lukasiewicz method. While observing the emergence of individual phenological symptoms and measurements of the concentration of pollen of the investigated taxa in the air of Poznań, a distinct acceleration was observed in 2004, a year that was characterized by a milder winter. This applied not only to the species blooming in early spring, but also to the later ones. Pollen grains of the investigated taxa, except for Aesculus, appeared earlier in aeropalinological observations than the macroscopically observed beginning of flowering in selected trees. Apart from a poplar, the end of flowering in the other trees occurred each year earlier than would follow from the aerobiological observations. This may be explained by the abundance of species within a taxon, and the effect of medium - and long-distance transport.

Pollen seasons of selected tree and shrub taxa in Krakow and its neighbourhood

100%

Myszkowska D., Jenner B., Cywa K., Kuropatwa M., Stepalska D., Piotrowicz K.

Acta Agrobotanica

2007

tom 60

nr 2

The aim of the study was to compare the dynamics of pollen seasons of selected tree and shrub taxa among measurement sites in Kraków and its neighbourhood. The study was performed in Kraków and Piotrkowice Małe in 2002, as well as in Kraków and Giebułtów in 2006. During the study the volumetric method was applied and pollen grains were counted along four horizontal lines. The lowest percentage of Corylus pollen and the highest percentage of Betula pollen were found in the analysed sites. The differences among start dates in various measurement sites in a given year were inconsiderable. Statistically significant differences of SPI values for the majority of taxa were found between measurement sites and between seasons for Kraków. The pollen season dynamics showed one (Betula, Pinaceae) or more maximum values (Corylus, Populus, Fraxinus, Salix). The occurrence of many peaks could be explained by the appearance of several species within one genus in the studied area or by various weather conditions. In 2002 maximum pollen concentrations were recorded earlier than in 2006. The differences in these dates could be explained better by cumulative temperature >5°C than >0°C.

Ograniczanie wyników

2 Acta Agrobotanica

1 Cywa K.

1 Jenner B.

1 Kluza-Wieloch M.

1 Kuropatwa M.

1 Myszkowska D.

1 Piotrowicz K.

1 Stach A.

1 Stepalska D.

1 Zientarska A.

1 2007

1 2006

Wyniki wyszukiwania

The phenology of flowering and fluctuations of airborne pollen concentrations of selected trees in Poznan, 2003-2004

Pollen seasons of selected tree and shrub taxa in Krakow and its neighbourhood