This research was aimed at realizing the aerobiological monitoring, identifying and quantifying the types of pollen grains in the atmosphere of the city of Caxias do Sul. This study had started in January 1st, 2001 and finished in December 31st, 2002. The samplings were taken using the volumetric suction sampler (HIRST, 1952), Burkard® model, placed on the roof of the General Hospital in the University of Caxias do Sul, about 20m above ground, without nearby obstacles that could interrupt the air flow. During the period of study, 40 pollen types were identified. The pollen types Carya, Melastomataceae, Mimosa scabrella, Myrsine and Sorocea bonplandii were sellected because they were not found in other aeropalinological references, being registered for the first time in Caxias do Sul Pollen Calendar (VERGAMINI, 2003). Temperature, wind and rainfall were the main responsibles for the large pollen quantitative changes in the atmosphere. The pollen types Carya and Melastomataceae occured mainly in Spring. Mimosa scabrella presented higher concentrations in Winter months, and was considered the second more frequent pollen type. Myrsine pollen type occured mainly in the Autumn. Sorocea bonplandii pollen occured in all months, being more frequent in Spring and Summer.
aeropalinology; pollen; Caxias do Sul
