Contenido polínico de la atmósfera de Caxias do Sul (Rio Grande do Sul, Brasil) 2001-2002

Abstract

The pollen concentration in the atmosphere of Caxias do Sul was studied using the volumetric suction Hirst-type sampler (Burkard® model), during 2001 and 2002. During the study period, 40 pollen types were identified and 18 of these were selected to compose the Pollen Calendar: Amaranthus, Araucaria, Asteraceae, Carya, Cupressaceae, Cyperaceae, Ligustrum, Melastomataceae, Mimosa scabrella, Myrsine, Myrtaceae, Pinaceae, Plantago, Poaceae, Ricinus, Rumex, Sorocea and Urticaceae, which account for 97% of the total pollen content. Clearly distinct pollen seasons were observed, with the highest concen­trations of pollen grains in winter and spring.