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Quantitative aeropalynology in the atmosphere of Buenos Aires city, Argentina
Authors:Daniela S Nitiu  Andrea C Mallo  Edgardo J Romero
Institution:(1) Cátedra de Palinología, Universidad Nacional de La Plata, Paseo del Bosque s/n, (1900) La Plata;(2) CIC, Universidad Nacional de La Plata, Paseo del Bosque s/n, 1900 La Plata, Argentina;(3) Laboratorio de Palinología y Paleobotánica, Universidad de Buenos Aires, Intendente Guiraldes 2620, 1428 Buenos Aires, Argentina;(4) Museo de Ciencias Naturales Bernardino Rivadavia, Angel Gallardo 470, 1405, Argentina
Abstract:For the first time, a volumetric study ofBuenos Aires city atmosphere was conductedusing a Lanzoni collector from March 1997through March 1998. Fifty-four pollen typeswere recorded of which 13 had a relativeconcentration of more than 1% of the yearlytotal. The lowest concentration of pollengrains was recorded in June, when Urticas,pp., Morus spp., and Myrtaceae were low.On the other hand, the highest concentration ofpollen grains was reached in September, with anincrease in Fraxinus spp. Theaeropalynological record may be divided intothree periods: *AP Dominant from July toOctober, *NAP Dominant from November toMarch, and *Residual Period from April toJune with low pollen concentrations.The greatest number of species was recorded inNovember, when 32 types were present, and thelowest number of species in June, when only 13pollen types were recorded. In June, the pollenconcentration was not dominated by any specieswhereas in September 85% of the pollen wasderived from one species of Fraxinus.Earlier studies on the aeropalynology of BuenosAires City were performed using Tauber andRotorod samplers. They were comparable to thisstudy, especially since the pollen peak wasreached in September, although the main pollenproducing species were different.
Keywords:aeropalynology  Buenos Aires city  diversity  NAP &  AP  pollen calendar  richness
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