Analysis of the grass (Poaceae L.) pollen seasons in Wrocław, 2003-2010

Abstract

A b s t r a c tThe aim of the study was to analyse the grass pollen season dynamics in Wrocław in [2003][2004][2005][2006][2007][2008][2009][2010]. The studies were carried out using volumetric method (Burkard trap). Special attentions was paid to differences in pollen season duration and patterns. The pollen season started on average on the 130 th day of the year (±10 days) and ended on the 240 th (±11 days). Peak of pollen seasons occurred between 156 th and 185 th day of the year. The mean of SPI value was 2805 (±380). On average, 18 days (±4 days) with a grass pollen concentration of more than 50 grains×m -3 , and 2 days (±1 day) with concentration of more than 120 grains×m -3 were recorded during the seasons analysed. Three types of pollen seasons were distinguished on the basis of cluster analysis (the non-hierarchical method of multifeature clustering -the k-means method).

Relation between Poaceae pollen concentrations and meteorological factors during 2000–2010 in Timisoara, Romania

“…Grasses include the three most important crops in the world (Triticum aestivum, Zea mays, Oryza sativa) and several productive species with great biofuel potential [6]. They are described as plants that have achieved evolutionary success [7].…”