POLLEN DIVERSITY IN THE AIR OF DIAMANTE (ENTRE RÍOS, ARGENTINA)

Fabiana Latorre & Marta A. Caccavari

Abstract

The first aerobiological survey of Diamante atmosphere (Entre Ríos, Argentina) was performed. We present here the preliminary results of one year analysis whose main objective was to determine the diversity of local and regional vegetation and the dynamics of floral phenology. Pollen data were obtained with a continuous, and volumetric methodology using a Hirst type sampler (Lanzoni), which allows the aerobiologic comparison with any site around the world, besides of its direct application in allergological medicine. The most abundant pollen types in the air in decreassing order of importance were: Moraceae (with 60% of the annual total pollen, ATP), Poaceae, Cupressaceae, Fraxinus, Salix, Asteraceae Asteroideae, Celtis, Ambrosia, Artemisia, Urticaceae and Cyperaceae. Each one of these taxa reached at least 2% of the ATP. If Moraceae is not considering, all the above taxa including Platanus account for 76% of ATP. Relationship between pollen and temperature was positive, and between pollen and humidity was negative. It is discussed if it exists differential representativity of the native species (regional) in relation to exotics ones (local) in the pollen spectrum, and the possibility of transport from medium or long distances.