Aeropalynologic analysis of La Plata City (Argentina) during a 3-year period

A continuous aeropalynologic survey of the atmosphere of La Plata was carried out between July 1998 and June 2001 in order to study flowering development from winter to summer using a Lanzoni volumetric spore trap. The total pollen spectrum was represented by 79 pollen types. Between 10 and 12 pollen types showed a relative concentration of more than 1% of the annual total. Airborne pollen was mainly represented by Platanus, Fraxinus, Cupressaceae, Poaceae, Urticaceae, Cyperaceae, Myrtaceae, Celtis, Casuarina and Morus during the 3-year period. Acer and Ambrosia pollen types were only dominant in the first 2 years. Maximum absolute concentrations were recorded in the the July 1998–June 1999 period, and the minimum concentrations were recorded in the July 2000–June 2001 period. The contribution of the arboreal pollen grains was higher than 68% relative to the annual total for each year. Two periods of maximum pollen emissions were found for each year: pollen from aboreal taxa predominated from July to October, and pollen from herbaceous taxa predominated from November to March. There was very little pollen in the atmosphere between April and June. The maximum arboreal and herbaceous pollen emissions were recorded during hours of daylight: at 10:00 and 14:00 hours.Facultad de Ciencias Naturales y Muse

Annual, daily and intradiurnal variation of <i>Celtis</i> pollen in the city of La Plata, Argentina

The behaviour of Celtis airborne pollen was studied for a period of three years (1998–2000) in the city of La Plata. The pollen grains were captured with a Lanzoni trap and the maximum pollination period was observed to occur during the end of winter and spring in the three years. The annual values of pollen concentration varied, and a significant decrease was observed during 2000. The greatest airborne pollen record was in October with an average of 82.3% in relation to its total concentration during 1998–2000. Based on the intradiurnal behaviour analysis, it was observed that the maximum pollination peak occurs at 2H when the temperature reaches its maximum values. Considering the three sampling years, the meteorological variables that most influenced the processes of pollen emission, dispersion and transportation in the atmosphere were: maximum and minimum temperature and rainfall.Facultad de Ciencias Naturales y Muse

Intradiurnal fluctuation of pollen in La Plata, Argentina: part I, herbaceous pollen types

A pollen analysis was carried out on six herbaceous pollen types whose annual concentration represents a percentage higher than 0.3% in the atmosphere of the city of La Plata, Argentina, from July 1998 to June 2001. They are: Ambrosia, Cyperaceae, Chenopodiaceae-Amaranthaceae, Plantago, Poaceae and Urticaceae. Hourly patterns of the pollen types analysed with the intradiurnal daily index (IDI) could be grouped into three categories account the percentage that represent of pollen concentration registered during five hourly periods of the day. Group I includes pollen types that show a sharp peak in abundance gust one at hour of the day. Group II is formed by pollen types that show high concentrations in more than one hourly band during the daylight. Group III is characterized by the pollen types that show lower concentrations over a broad hourly band during the day.Facultad de Ciencias Naturales y Muse

Aeropalynologic analysis of La Plata City (Argentina) during a 3-year period

A continuous aeropalynologic survey of the atmosphere of La Plata was carried out between July 1998 and June 2001 in order to study flowering development from winter to summer using a Lanzoni volumetric spore trap. The total pollen spectrum was represented by 79 pollen types. Between 10 and 12 pollen types showed a relative concentration of more than 1% of the annual total. Airborne pollen was mainly represented by Platanus, Fraxinus, Cupressaceae, Poaceae, Urticaceae, Cyperaceae, Myrtaceae, Celtis, Casuarina and Morus during the 3-year period. Acer and Ambrosia pollen types were only dominant in the first 2 years. Maximum absolute concentrations were recorded in the the July 1998–June 1999 period, and the minimum concentrations were recorded in the July 2000–June 2001 period. The contribution of the arboreal pollen grains was higher than 68% relative to the annual total for each year. Two periods of maximum pollen emissions were found for each year: pollen from aboreal taxa predominated from July to October, and pollen from herbaceous taxa predominated from November to March. There was very little pollen in the atmosphere between April and June. The maximum arboreal and herbaceous pollen emissions were recorded during hours of daylight: at 10:00 and 14:00 hours.Facultad de Ciencias Naturales y Muse

Incidence of allergenic pollen of Acer spp., Fraxinus spp. and Platanus spp. in the city of La Plata, Argentina : Preliminary results

This work studies the airborne pollen concentrations of Acer spp.,Fraxinus spp. and Platanus spp. since the pollen of these three taxa has been characterized as etiological agents of pollinosis. These tree species are present in large amounts in the streets of La Plata city.The aeropalynological monitoring was performed with a Hirst-type spore trap (Lanzoni VPPS,2000). The emission period of the three taxa extends from approximately late August to October.The maximum cumulative total of arboreal pollen was found to be 30824.7 from September 12 to 18. This period coincides with the peak of total pollen concentration.Pollen grains trapped were analysed and expressed as daily averages of 5-hour bands per day during the whole year. Maximum pollen concentration was registered between 10 a.m.and 2 p.m. During the studied period, 67 patients examined at the Allergy Service of ``Hospital Interzonalde Agudos R. Rossi'' (La Plata) showed allergic disease. These allergenic episodes may be produced by the large amount of pollen trees in the city area.Laboratorio de Etnobotánica y Botánica Aplicad

Arboreal pollen record in the atmosphere of San Miguel de Tucumán city, Argentina- august to november 2006

El objetivo de este estudio fue realizar la caracterización aerobiológica de la ciudad de San Miguel de Tucumán (26º 50´S, 65º 15´W) durante el período de primavera agosto - noviembre 2006. El muestreo se realizó con un captador volumétrico tipo  Hirst (modelo Burkard).  Se identificaron 30 tipos polínicos que aportaron un total de 3290 granos durante ese periodo. El 75,41% del polen captado correspondió a polen proveniente de especies arbustivas y arbóreas (PA) mayoritariamente exóticas cultivadas en la ciudad y al de especies nativas las cuales se hallan en las laderas orientales de las sierras de San Javier. La máxima concentración se registró en el mes de septiembre con 1178 granos y estuvo dada principalmente por el aporte de 19 tipos polínicos arbóreos siendo Broussonetia (65,79%) el más abundantes .En menores proporciones se registraron Morus (9,24%), Alnus (7,51%), Celtis (6,50%), Fraxinus (2,29%), Platanus (1,90%) y Juglans (0,73%). El análisis intradiurno muestra un marcado incremento en horas nocturnas que se inicia a partir de la hora 20:00, se acentúa a las horas 22:00 y 2:00 hasta alcanzar el máximo a las 8:00, siendo el valor mínimo a la hora 14. En este período el aporte polínico principal corresponde a taxa arbóreos y arbustivos los cuales presentan altos niveles de concentración en un corto período de tiempo.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.Fil: García, María Elena. Fundación Miguel Lillo; ArgentinaFil: Nitiu, Daniela Silvana. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Cátedra de Palinología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentin

Influencia de los factores meteorológicos en el espectro aerobiológico de un área urbana

El objetivo del presente trabajo es evaluar el impacto de los factores meteorológicos sobre el contenido de polen y esporas fúngicas en la ciudad de La Plata. Se realizó un monitoreo aerobiológico de altura, en un sitio céntrico de la ciudad. Se llevó a cabo el análisis cuali-cuantitativo de las muestras y se seleccionaron los tipos polínicos y esporales más abundantes. Se aplicó el coeficiente de correlación de Spearman para evaluar la incidencia de factores meteorológicos: temperatura, humedad, precipitaciones y velocidad del viento sobre la concentración de partículas. En polen, se observaron correlaciones positivas significativas con la temperatura en Platanus, Fraxinus, Cupressaceae y Poaceae. La humedad jugó un papel negativo en todos los tipos polínicos. Se obtuvieron correlaciones positivas con la temperatura para las esporas de Agaricus, Coprinus, Cladosporium cladosporioides y C. herbarum. La humedad relativa afectó positivamente a Leptosphaeria y negativamente a C. herbarum. Estos resultados reflejan la influencia de la temperatura sobre los ciclos vitales de las biopartículas en términos de abundancia y distribución y anticipan los posibles efectos del Cambio Climático sobre la vegetación y otras fuentes emisoras. Asimismo, en muchos casos la dirección de los cambios provocados por la presión de este fenómeno serádependientede cada organismo en particular.Universidad Nacional de La Plat

Influencia de los factores meteorológicos en el espectro aerobiológico de un área urbana

El objetivo del presente trabajo es evaluar el impacto de los factores meteorológicos sobre el contenido de polen y esporas fúngicas en la ciudad de La Plata. Se realizó un monitoreo aerobiológico de altura, en un sitio céntrico de la ciudad. Se llevó a cabo el análisis cuali-cuantitativo de las muestras y se seleccionaron los tipos polínicos y esporales más abundantes. Se aplicó el coeficiente de correlación de Spearman para evaluar la incidencia de factores meteorológicos: temperatura, humedad, precipitaciones y velocidad del viento sobre la concentración de partículas. En polen, se observaron correlaciones positivas significativas con la temperatura en Platanus, Fraxinus, Cupressaceae y Poaceae. La humedad jugó un papel negativo en todos los tipos polínicos. Se obtuvieron correlaciones positivas con la temperatura para las esporas de Agaricus, Coprinus, Cladosporium cladosporioides y C. herbarum. La humedad relativa afectó positivamente a Leptosphaeria y negativamente a C. herbarum. Estos resultados reflejan la influencia de la temperatura sobre los ciclos vitales de las biopartículas en términos de abundancia y distribución y anticipan los posibles efectos del Cambio Climático sobre la vegetación y otras fuentes emisoras. Asimismo, en muchos casos la dirección de los cambios provocados por la presión de este fenómeno serádependientede cada organismo en particular.Universidad Nacional de La Plat

Influencia de los factores meteorológicos en el espectro aerobiológico de un área urbana

El objetivo del presente trabajo es evaluar el impacto de los factores meteorológicos sobre el contenido de polen y esporas fúngicas en la ciudad de La Plata. Se realizó un monitoreo aerobiológico de altura, en un sitio céntrico de la ciudad. Se llevó a cabo el análisis cuali-cuantitativo de las muestras y se seleccionaron los tipos polínicos y esporales más abundantes. Se aplicó el coeficiente de correlación de Spearman para evaluar la incidencia de factores meteorológicos: temperatura, humedad, precipitaciones y velocidad del viento sobre la concentración de partículas. En polen, se observaron correlaciones positivas significativas con la temperatura en Platanus, Fraxinus, Cupressaceae y Poaceae. La humedad jugó un papel negativo en todos los tipos polínicos. Se obtuvieron correlaciones positivas con la temperatura para las esporas de Agaricus, Coprinus, Cladosporium cladosporioides y C. herbarum. La humedad relativa afectó positivamente a Leptosphaeria y negativamente a C. herbarum. Estos resultados reflejan la influencia de la temperatura sobre los ciclos vitales de las biopartículas en términos de abundancia y distribución y anticipan los posibles efectos del Cambio Climático sobre la vegetación y otras fuentes emisoras. Asimismo, en muchos casos la dirección de los cambios provocados por la presión de este fenómeno serádependientede cada organismo en particular.Universidad Nacional de La Plat

Airborne fungal spore content in the atmosphere of the city of La Plata, Argentina

The aim of this paper is to present the first aeromycological study of the atmosphere of the city of La Plata. Air samples were taken using a Hirst-type volumetric spore trap sampler (Lanzoni, VPPS 2000) for a period of a year (July 2000–June 2001). Seventy-nine morphological types of spores belonging to the Phyla Myxomycota, Zygomycota, Oomycota, Ascomycota, Basidiomycota, as well as anamorphs of Higher Fungi were identified. A total of 171670.21 spores were recorded, with a daily mean of 540 spores/m³. The spores were present throughout the year the study was carried out. However, there was a wide daily fluctuation in the concentration values with a tendency toward an increase during the summer months. The fungal spores were classified in three categories: abundant, having five spore types; moderate having 12 types; and low, with 62 morphological types which represent 67.2, 24.2, and 8.6%, respectively. The most representative taxa were Cladosporium cladosporioides, Leptosphaeria, Cladosporium herbarum, Coprinus, and Agaricus, the first two taxa having a high frequency during the year of study. This scientific research reveals a great diversity of morphological types in this outdoor environment, showing a strong dominance of the Imperfect Fungi, whose components have seasonal rates. By this study, the first aeromycological profile of an urban center of Argentina has been portrayed, and new information on the field of aeromycology in the country has been provided.Facultad de Ciencias Naturales y MuseoComisión de Investigaciones Científicas de la provincia de Buenos Aire