Aerobiological study of Fagaceae pollen in the middle-west of Spain |
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Authors: | David Rodríguez de la Cruz Estefanía Sánchez Reyes José Sánchez Sánchez |
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Institution: | (1) Department of Botany, Hispano-Luso Agrarian Research Center (C.I.A.L.E.), University of Salamanca, Campus Miguel de Unamuno s/n, 37007 Salamanca, Spain |
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Abstract: | The concentration of airborne Fagaceae pollen in Salamanca and the correlations with some meteorological parameters have been
examined. Castanea and Quercus pollen grains were collected from 1998 to 2004 using a Burkard spore trap. No pollen grains of Fagus were found. The main pollen season took place in April and May for Quercus and in June and July for Castanea. Yearly variations on these dates could be related to the influence of meteorological factors such as rainfall, temperature,
or dominant winds. The highest values appeared in the year 2004 for both taxa. The Fagaceae airborne content was mainly due
to Quercus pollen, Castanea having a scarce pollen content in the city of Salamanca. The highest counts of Fagaceae pollen grains were found from mid
May to early June due to the pollen behavior of oaks. The cumulative counts varied over the years, with a mean value of 2,384
pollen grains, a highest total of 6,036 in 2004 and a lowest total of 954 in 2001. No cyclic variations were observed. Daily
pollen concentrations presented positive correlation with temperature, negative with relative humidity and slightly negative
with rainfall using Spearman's correlation coefficients, only in the case of Castanea, because the particular hourly distribution of rainfall during the spring might affect Quercus airborne pollen. |
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Keywords: | Castanea Fagaceae Meteorology Pollen Quercus Salamanca Spain |
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