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Boletín de la Sociedad Argentina de Botánica

On-line version ISSN 1851-2372

Abstract

GARCIA, María Elena  and  NITIU, Daniela Silvina. Registro polínico arbóreo en la atmósfera de la ciudad de San Miguel de Tucumán, Argentina- agosto a noviembre 2006. Bol. Soc. Argent. Bot. [online]. 2012, vol.47, n.1-2, pp. 23-31. ISSN 1851-2372.

Arboreal pollen record in the atmosphere of San Miguel de Tucumán city, Argentina- august to november 2006. The aim of this study was to make the aerobiological characterization of San Miguel de Tucumán city (26º 50'S, 65º 15'W) during the spring period august to november 2006. The sampling was performed with a Hirst type volumetric collector (Burkard model). Thirty pollen types were identified, providing a total of 3290 grains in the period. The 75,41% of pollen caught corresponded to pollen from shrub and tree species (PA), mainly exotic ones cultivated in the city and the native species growing on the eastern slopes of the Sierras de San Javier. The highest concentration was recorded in september with 1178 grains it was due to by the contribution of 19 tree pollen types being Broussonetia (65, 79%) the most abundant. At lower rates were recorded Morus (9, 24%), Alnus (7, 51%), Celtis (6, 50%), Fraxinus (2, 29%), Platanus (1, 90%), and Juglans (0, 73%). Intra-diurnal analysis shows a marked increase in night time which starts at 20:00 hours, increases between 22:00 and 2:00 to reach maximum at 8:00 in the morning. The minimum is recorded at 14:00 hours. During this period the main contribution corresponds to pollen taxa of trees and shrubs which have high levels of concentration in a short period of time.

Keywords : Arboreal pollen; Atmosphere; Volumetric sampler; Tucumán; Argentina.

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