The influence of climate changes in<i>Platanus</i>spp. pollination in Spain and Italy

The objective of this study was to analyse the dynamics of the Alnus and Corylus pollen seasons in Poland with reference to spatial and seasonal differentiation. Aerobiological monitoring was performed in 10 cities, in 1994-2007. Five characteristics defining the pollen season were considered: 1. beginning and end dates of the season phases (5, 25, 50, 75, 95% of annual totals), 2. pollen season duration (90% method), 3. skewness and 4. kurtosis of airborne pollen curves, and 5. annual pollen totals. The beginning of the Corylus pollen season in Warsaw started on the 53rd day of a year. The Alnus pollen season started 9.5 days (SE = 1.4) later. The start of the season for both taxa was delayed by 3.3 (SE = 0.5) days for each 100 km towards the east. The Corylus pollen season lasted about 15 days longer than the Alnus season. Season duration for both taxa decreased towards the east by 3.5 days (SE = 0.7) and towards the north by 1.3 days (SE = 0.6) for each 100 km. Seasonal dynamics of both taxa are skewed to the right. In cities located west of Warsaw the dynamics are more skewed (except at Szczecin, Wroclaw). Asymmetry decreases towards the east by 0.16/100 km. Almost all kurtosis values of pollen-season dynamics were positive and higher for Alnus. Kurtosis values for both taxa increase together with delay of the pollen season beginning by 4% per day (p \ 0.0001). Mean pollen total increases: for Corylus mainly towards the north (by 64%/100 km), for Alnus mainly towards the west (by 15%/100 km). Geographical location (longitude and latitude) determines: the start and duration of the pollen season, skewness of the pollen curve, and annual totals.

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“…Similar results were obtained by Tedeschini et al (2006), who compared skewness values of Platanus pollen curves in chilly and warm years.…”

Section: Discussionsupporting

confidence: 87%

Spatial variations in the dynamics of the Alnus and Corylus pollen seasons in Poland

et al. 2010

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“…a moderate increase of temperature resulted in a delay in winter/early spring tree pollen season start (Emberlin et al 2007 ;Tedeschini et al 2006 ) . It also depends on regional characteristics Recio et al 2009 ) , what may confound patterns.…”

Section: Climate Impacts On the Timing Of Pollen Seasonsmentioning

confidence: 99%

The Onset, Course and Intensity of the Pollen Season

et al. 2012

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The onset, duration and intensity of the period when pollen is present in the air varies from year to year. Amongst other things, there is an effect upon the quality of life of allergy sufferers. The production and emission of pollens are governed by interacting environmental factors. Any change in these factors may affect the phenology and intensity of the season. Readiness to fl ower in a plant, and the amount of pollen produced, is the result of conditions during an often long period foregoing fl owering. When a plant is ready to fl ower, temporary ambient circumstances e.g., irradiation and humidity, determine the timing of the actual

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“…6,7,8,9,10,11,12,21,22 All these papers report, as the present study showed, that Platanus pollen appears abruptly in the air and is recorded over a short period of time during March and early April; the highest proportion of the PI is recorded over a period of 2 or 3 weeks, and temperature is the parameter most influencing airborne pollen counts. This is a typical urban pollen type, scarce in natural areas: while very high counts are recorded in C ordoba city, counts are very low, indeed almost non-existent, in non-urban areas of C ordoba province.…”

Section: Discussionmentioning

confidence: 81%

“…A number of studies confirm that temperature is the weather parameter with the greatest influence on the Platanus pollen season, affecting both start-date and daily pollen counts. 6,11,12 Rainfall, although presenting pronounced variations in Andalusia, does not affect the Platanus pollen season as it is an ornamental tree artificially watered. The present paper reports on an analysis of the Platanus pollen season throughout the whole Andalusia region (southern Spain), which has among the highest pollen counts and the highest incidence of Platanus-related allergies in Europe.…”

Section: Introductionmentioning

confidence: 99%

Platanus pollen season in Andalusia (southern Spain): trends and modeling

et al. 2011

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Platanus is a major cause of pollen allergy in many Spanish cities. The present paper reports an analysis of Platanus pollen season throughout the Andalusia region (southern Spain), which has among the highest pollen counts and the highest incidence of Platanus-related allergies in Europe. The main aim was to analyze pollen season trends from 1992 to 2010 in Andalusia; models were also constructed to forecast the start of the season. Daily pollen counts were recorded using Hirst-type volumetric sporetraps. Pollen season start-dates were very similar at all sites, usually occurring in March. The pollen season was delayed over the study period. The Pollen-season duration and Pollen index generally increased throughout the study period. The starting date for temperature accumulation was around the 10th February, although the threshold temperatures varied by site. The regional model for Andalusia failed to provide sufficiently accurate results compared with sub-regional or local models. For modeling purposes, three sub-regions are recommended: Inland, East Coast and West Coast.

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The influence of climate changes inPlatanusspp. pollination in Spain and Italy

Cited by 32 publications

References 19 publications

Spatial variations in the dynamics of the Alnus and Corylus pollen seasons in Poland

Spatial variations in the dynamics of the Alnus and Corylus pollen seasons in Poland

The Onset, Course and Intensity of the Pollen Season

Platanus pollen season in Andalusia (southern Spain): trends and modeling

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