Airborne pollen grains in Ajlun, Northern Jordan, 2006–2007

Al-Quran, S. (2012) Airborne pollen grains in Ajlun, Northern Jordan, 2006–2007. Acta Botanica Hungarica, 54 (1-2). pp. 27-34. ISSN 0236-6495

Text abot.54.2012.1-2.2.pdf Restricted to Repository staff only until 31 March 2032. Download (445kB)

Abstract

The related factors concern the dates of the appearance of pollen grains in the air, the duration of the presence of sporomorphs and the maximum concentrations in particular seasons were investigated. The aim of the study was to compare the airborne concentrations of allergenic pollen produced by three dominant early flowering tree taxa (Cupressus, Pinus and Olea) in the three different sites (Ajlun city (A), Rabbad castle (C), and Debbeen (D)) of Ajlun during the years 2006–2007. Measurements were performed by the volumetric method. Pollen seasons were defined as the periods in which 95% of the total catch occurred. Significant differences in the pollen count of the examined taxa were observed between two seasons: the pollen count of Cupressus was higher in 2006 than in 2007, while for Pinus and Olea the opposite was the case. The highest concentration and annual pollen counts of Pinus, Cupressus and Olea were measured in Ajlun city in both seasons, where the annual pollen count of Olea in 2007 was four times higher than in 2006 and equalled 4,215 grains in m³ per 24 h. The longest pollen seasons were observed at low annual pollen counts for the pollen of Cupressus. Results of the study reveal significant differences between the seasons and the cities. The pollen counts of Cupressus, Pinus and Olea trees are determined by the weather, diversity of local flora and specific rhythm of pollination of particular taxa.

Actions (login required)

Edit Item