Diurnal variation of airborne pollen at two different heights

The diurnal variation in airborne pollen concentrations in the air of Córdoba at two different heights (1.5 m and 15 m) was studied during 2 consecutive years with the help of two Hirst volumetric samplers. According to pollen percentages obtained every hour, we determined whether every taxon studie...

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Bibliographic Details
Published inJournal of investigational allergology & clinical immunology Vol. 9; no. 2; p. 89
Main Authors Alcázar, P, Galán, C, Cariñanos, P, Domínguez-Vilches, E
Format Journal Article
LanguageEnglish
Published Spain 01.03.1999
Subjects
Altitude
Circadian Rhythm
Longitudinal Studies
Plants
Pollen - growth & development
Seasons
Species Specificity
Time Factors
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Summary:The diurnal variation in airborne pollen concentrations in the air of Córdoba at two different heights (1.5 m and 15 m) was studied during 2 consecutive years with the help of two Hirst volumetric samplers. According to pollen percentages obtained every hour, we determined whether every taxon studied presented a morning or an afternoon pattern, and whether this model was homogeneous (with a slight difference between the time of maximum and minimum reading) or heterogeneous (with a large difference between the two readings). We observed that the taxa that had many species in the area, such as Plantago, Poaceae, and Chenopodiaceae-Amaranthaceae showed a homogeneous model, while those taxa with few species present, such as Cupressaceae and Urticaceae showed a more heterogeneous model. Furthermore, the pattern of the plants with a large presence in the study area was more heterogeneous at 1.5 m because the pollen collected at this height is released from anthers. In the sampler placed at 15 m we detected airborne pollen, found that the curves were smoother and also observed a slight time delay for the taxa that were highly present in the area of study.
ISSN:1018-9068