Aeropalynologic analysis of La Plata, Argentina

NITIU, D.S

Granada, España

Congreso; IX International Palynological Congress; 2004

APLE, IFPS

A continuous aeropalynological survey of the atmosphere of La Plata was carried out from july 1998 to june 2001 by using a Lanzoni volumetric spore trap. The total pollen spectrum was represented by seventy-nine pollen types. Between ten and (doce) pollen types had a relative concentration of more than 1% of the annual total. The airborne pollen was mainly represented by Platanus, Fraxinus, Cupressaceae, Poaceae, Urticaceae, Cyperaceae, Myrtaceae, Celtis, Casuarina and Morus during the three years. The pollen types Acer and Ambrosia were only dominant in the first two years. The maximum absolute concentrations were recorded in the 98/99 year and the minimum concentrations were recorded in the 00/01 year. The contribution of the arboreal pollen grains was higher than 68% compared to the annual total for each year. Two periods of maximum pollen emissions were found for each year, one from july to october with arboreal taxa predominance and another from november to march with herbaceous taxa predominance. The period from april to june showed escaso pollen in the atmosphere. The maximum arboreal and herbaceous pollen emissions were recorded during the hours day, at 10:00 and 14:00 hours.