Disentangling the effects of feedback structure and climate on Poaceae annual airborne pollen fluctuations and the possible consequences of climate change

León, David García de; Garcı́a-Mozo, Herminia; Galán, Carmen; Alcázar, Pilar; Lima, Maurício; González‐Andújar, José Luis

doi:10.1016/j.scitotenv.2015.05.104

Cited by 20 publications

(16 citation statements)

References 41 publications

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“…2), with an average value for the last years about halved in respect of the end of last century. A similar trend has been observed by Ridolo et al (2007) in the city of Parma (Northern Italy), but is in contrast with what has been reported in other areas of the Mediterranean region (García-Mozo et al 2011, García de León et al 2015, and needs to be explained taking into account different exogenous factors that could influence the quantity of grasses of different species and the pollen produced and released by each of them. In particular, we have reasons to motivate this trend with recent changes in the land use and urban green management.…”

Section: Discussionsupporting

confidence: 67%

“…The pollen production and flowering time are under genetic and physiological control, but environmental conditions-especially climate-can have a strong influence on them (Pacini 2000;García de León et al 2015). Many studies have been carried out which correlate different meteorological parameters with Poaceae pollination time and intensity (Galán et al 1995, Iglesias et al 1998, Sánchez-Mesa et al 2003.…”

Section: Introductionmentioning

confidence: 99%

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Climate change: consequences on the pollination of grasses in Perugia (Central Italy). A 33-year-long study

et al. 2016

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Many works carried out in the last decades have shown that the pollen season for taxa flowering in winter and spring, in temperate regions, has tended to be earlier, probably due to the continuous rise in temperature. The mean annual temperature in Perugia, Central Italy, was about 0.5 °C higher in the last three decades compared with that registered from 1952 to 1981. The increase of temperature took place mainly in winter and spring, while no significant variation was recorded during the summer and autumn. This scenario shows variations in the timing and behavior of flowering of many spontaneous plants such as grasses, whose phenology is strongly influenced by air temperature. This work reports fluctuations in the airborne grass pollen presence in Perugia over a 33-year period (1982-2014), in order to study the influence of the warming registered in recent years on the behavior of pollen release of this taxon. The grass pollen season in Perugia typically lasts from the beginning of May to late July. The start dates showed a marked trend to an earlier beginning of the season (-0.4 day/year), as well as a strong correlation with the average temperatures of March and April. The peak is reached around 30th May, but the annual pollen index (API) is following a decreasing trend. The correlation between starting dates and spring temperatures could be interesting for the constitution of a forecasting model capable of predicting the presence of airborne grass pollen, helping to plan therapies for allergic people.

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Section: Discussionsupporting

confidence: 67%

Section: Introductionmentioning

confidence: 99%

Climate change: consequences on the pollination of grasses in Perugia (Central Italy). A 33-year-long study

et al. 2016

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“…For instance, the observed max–min ratio in Cordoba, Spain (García de León et al 2015), is almost an order of magnitude, whereas transport brings about a factor of 1.5 or less (Fig. 6).…”

Section: Discussionmentioning

confidence: 95%

On impact of transport conditions on variability of the seasonal pollen index

Sofiev

2016

Aerobiologia

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This discussion paper reveals the contribution of pollen transport conditions to the interannual variability of the seasonal pollen index (SPI). This contribution is quantified as a sensitivity of the pollen model predictions to meteorological variability and is shown to be a noticeable addition to the SPI variability caused by plant reproduction cycles. A specially designed SILAM model re-analysis of pollen seasons 1980-2014 was performed, resulting in the 35 years of the SPI predictions over Europe, which was used to compute the SPI inter-annual variability. The current paper presents the results for birch and grass. Throughout the re-analysis, the source term formulations and habitation maps were kept constant, which allowed attributing the obtained variability exclusively to the pollen release and transport conditions during the flowering seasons. It is shown that the effect is substantial: it amounts to 10-20% (grass) and 20-40% (birch) of the observed SPI year-to-year changes reported in the literature. The phenomenon has well-pronounced spatial-and species-specific patterns. The findings were compared with observation-based statistical models for the SPI prediction, showing that such models highlight the same processes as the analysis with the SILAM model.

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“…Knowledge of this interaction is fundamental in order to understand and predict grass phenology and its response to climate. In a recent paper, García de León et al disentangled the effects of feedback structure and climate on Poaceae reproductive phenology. Their findings highlighted the importance influence of first‐order negative feedback as well as of temperature and rainfall on airborne Poaceae pollen dynamics.…”

Section: Phenologymentioning

confidence: 99%

Poaceae pollen as the leading aeroallergen worldwide: A review

Garcı́a-Mozo

2017

Allergy

147

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The Poaceae family comprises over 12 000 wind-pollinated species, which release large amounts of pollen into the atmosphere. Poaceae pollen is currently regarded as the leading airborne biological pollutant and the chief cause of pollen allergy worldwide. Sensitization rates vary by country, and those variations are reviewed here. Grass pollen allergens are grouped according to their protein structure and function. In Poaceae, although species belonging to different subfamilies are characterized by distinct allergen subsets, there is a considerable degree of cross-reactivity between many species. Cross-reactivity between grass pollen protein and fresh fruit pan-allergens is associated with the appearance of food allergies. The additional influence of urban pollution may prompt a more severe immunological response.The timing and the intensity of the pollen season are governed by species genetics, but plant phenology is also influenced by climate; as a result, climate changes may affect airborne pollen concentrations. This article reviews the findings of worldwide research which has highlighted the major impact of climate change on plant phenology and also on the prevalence and severity of allergic disease.

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Disentangling the effects of feedback structure and climate on Poaceae annual airborne pollen fluctuations and the possible consequences of climate change

Cited by 20 publications

References 41 publications

Climate change: consequences on the pollination of grasses in Perugia (Central Italy). A 33-year-long study

Climate change: consequences on the pollination of grasses in Perugia (Central Italy). A 33-year-long study

On impact of transport conditions on variability of the seasonal pollen index

Poaceae pollen as the leading aeroallergen worldwide: A review

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