Alcázar P, Galán C, Cariñanos P, Domínguez-Vilches E
Department of Plant Biology, Faculty of Science, Universidad de Córdoba, Spain.
J Investig Allergol Clin Immunol. 1999 Mar-Apr;9(2):89-95.
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.
在连续两年的时间里，借助两个赫斯特容量采样器，对科尔多瓦空气中两个不同高度（1.5米和15米）的空气中花粉浓度的日变化进行了研究。根据每小时获得的花粉百分比，我们确定所研究的每个分类单元呈现出上午模式还是下午模式，以及该模式是均匀的（最高读数和最低读数时间之间差异较小）还是非均匀的（两个读数之间差异较大）。我们观察到，该地区物种较多的分类单元，如车前属、禾本科和藜科-苋科，呈现出均匀模式，而物种较少的分类单元，如柏科和荨麻科，则呈现出更不均匀的模式。此外，在研究区域中占比大的植物的模式在1.5米高度处更不均匀，因为在这个高度收集的花粉是从花药中释放出来的。在放置于15米处的采样器中，我们检测到了空气中的花粉，发现曲线更平滑，并且还观察到在研究区域中占比高的分类单元存在轻微的时间延迟。
