Aerobiological monitoring provides the estimate of atmospheric pollen level. Several papers report that airborne pollen counts data, collected from samplers located in different sites of the same area, are often characterized by differences among sites. The authors found that the more frequent differences were due to layout of green space, microclimate or height of sampler. The main aim of the present study was to analyze and compare the results of 3-years (2015-2017) aerobiological sampling in Sassari between two Hirst type volumetric spore traps located 5 km apart in two different areas of the city. The first pollen-monitoring sampler (SS6) was located in the center of the city very close to a public garden, the second one (SS5) was placed in the outskirts of the city. The pollen concentration of the 20 taxa more abundant in the atmosphere of Sassari was considered. In order to define the characteristics of the main pollen season, several parameters were calculated for each allergenic pollen and year at each site: duration of pollen season, date of peak pollen concentration, annual pollen index, and the percentage of total number of grains. Spearman correlation analysis and t test were performed between daily pollen concentration data collected by the two samplers, to test differences between variations of the data recorded at each site. The results indicated that during the study period, the average percentages of total number of grains were similar in both samplers for the taxa with level higher than 1%. Average percentage over the 3-years observed for the two areas (SS6-SS5) were respectively: Cupressaceae (30.1-33.3%), Urticaceae (22.3-19.8%), Oleaceae (16.4-22.1%), Fagaceae (19.1-13.6%), Graminaceae (3.9-3.7%), Pinaceae (2.2-1.5%). Statistical analysis showed strong correlation between daily data from the two samplers, with significant values (p<0.01) for the Spearman correlation coefficient. These results indicates that airborne pollen in the two studied sites presented similar level.
Airborne pollen in Sassari (NW-Sardinia): a 3-years survey, comparison between two pollen samplers.
Annalisa Canu;Maria Leonarda Fadda;Pierpaolo Masia;Grazia Pellizzaro
2018
Abstract
Aerobiological monitoring provides the estimate of atmospheric pollen level. Several papers report that airborne pollen counts data, collected from samplers located in different sites of the same area, are often characterized by differences among sites. The authors found that the more frequent differences were due to layout of green space, microclimate or height of sampler. The main aim of the present study was to analyze and compare the results of 3-years (2015-2017) aerobiological sampling in Sassari between two Hirst type volumetric spore traps located 5 km apart in two different areas of the city. The first pollen-monitoring sampler (SS6) was located in the center of the city very close to a public garden, the second one (SS5) was placed in the outskirts of the city. The pollen concentration of the 20 taxa more abundant in the atmosphere of Sassari was considered. In order to define the characteristics of the main pollen season, several parameters were calculated for each allergenic pollen and year at each site: duration of pollen season, date of peak pollen concentration, annual pollen index, and the percentage of total number of grains. Spearman correlation analysis and t test were performed between daily pollen concentration data collected by the two samplers, to test differences between variations of the data recorded at each site. The results indicated that during the study period, the average percentages of total number of grains were similar in both samplers for the taxa with level higher than 1%. Average percentage over the 3-years observed for the two areas (SS6-SS5) were respectively: Cupressaceae (30.1-33.3%), Urticaceae (22.3-19.8%), Oleaceae (16.4-22.1%), Fagaceae (19.1-13.6%), Graminaceae (3.9-3.7%), Pinaceae (2.2-1.5%). Statistical analysis showed strong correlation between daily data from the two samplers, with significant values (p<0.01) for the Spearman correlation coefficient. These results indicates that airborne pollen in the two studied sites presented similar level.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
