Pollen season trends in winter flowering trees in South Spain

Velasco-Jiménez, M. J.; Alcázar, Pilar; Guardia, Consuelo Díaz de la; Trigo, María Del; Linares, Concepción De; Recio, Marta; Galán, Carmen

doi:10.1007/s10453-019-09622-x

Cited by 17 publications

(15 citation statements)

References 41 publications

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“…These correlations indicated that warmer temperatures these months result in later pollen start, end, and peak dates and increased pollen intensity. The January temperature correlation may suggest delays in the chilling requirement prior to leaf-out and spring development as suggested by Velasco-Jiménez et al (14). Increased precipitation in January also resulted in a later start date, and more work is needed to understand this relationship.…”

Section: Ulmus Pollenmentioning

confidence: 76%

“…However, not all areas and not all plant species have been affected by climate change. Pollen data from three cities in southern Spain suggest that from 1994 to 2017, pollen season start dates were delayed in some cities for Ulmus, Alnus and Populus (14). In addition to effects on late winter and springpollinating plants, studies have shown longer Ambrosia pollen seasons in the fall (15)(16)(17).…”

Section: Introductionmentioning

confidence: 99%

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Aeroallergens and Climate Change in Tulsa, Oklahoma: Long-Term Trends in the South Central United States

Levetin

2021

Front. Allergy

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Climate change is having a significant effect on many allergenic plants resulting in increased pollen production and shifts in plant phenology. Although these effects have been well-studied in some areas of the world, few studies have focused on long-term changes in allergenic pollen in the South Central United States. This study examined airborne pollen, temperature, and precipitation in Tulsa, Oklahoma over 25 to 34 years. Pollen was monitored with a Hirst-type spore trap on the roof of a building at the University of Tulsa and meteorology data were obtained from the National Weather Service. Changes in total pollen intensity were examined along with detailed analyses of the eight most abundant pollen types in the Tulsa atmosphere. In addition to pollen intensity, changes in pollen season start date, end date, peak date and season duration were also analyzed. Results show a trend to increasing temperatures with a significant increase in annual maximum temperature. There was a non-significant trend toward increasing total pollen and a significant increase in tree pollen over time. Several individual taxa showed significant increases in pollen intensity over the study period including spring Cupressaceae and Quercus pollen, while Ambrosia pollen showed a significant decrease. Data from the current study also indicated that the pollen season started earlier for spring pollinating trees and Poaceae. Significant correlations with preseason temperature may explain the earlier pollen season start dates along with a trend toward increasing March temperatures. More research is needed to understand the global impact of climate change on allergenic species, especially from other regions that have not been studied.

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Section: Ulmus Pollenmentioning

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Aeroallergens and Climate Change in Tulsa, Oklahoma: Long-Term Trends in the South Central United States

Levetin

2021

Front. Allergy

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“…Since the increase was more pronounced in urban areas than in rural sites, it was suggested that the increase in pollen could be due to a possible anthropogenic rise of atmospheric CO 2 . Several recent studies showed significant increasing airborne pollen concentration trends in relation to the changing climate as well as in shifts in the timing of the pollen seasons in Northern ( 13 , 17 , 18 ) and in southern Europe ( 19 – 21 ). The results often differ per region and pollen type.…”

Section: Introductionmentioning

confidence: 99%

Long-Term Pollen Monitoring in the Benelux: Evaluation of Allergenic Pollen Levels and Temporal Variations of Pollen Seasons

Weger¹,

Bruffaerts²,

Koenders³

et al. 2021

Front. Allergy

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Airborne pollen is a major cause of allergic rhinitis, affecting between 10 and 30% of the population in Belgium, the Netherlands, and Luxembourg (Benelux). Allergenic pollen is produced by wind pollinating plants and released in relatively low to massive amounts. Current climate changes, in combination with increasing urbanization, are likely to affect the presence of airborne allergenic pollen with respect to exposure intensity, timing as well as duration. Detailed analysis of long-term temporal trends at supranational scale may provide more comprehensive insight into these phenomena. To this end, the Spearman correlation was used to statistically compare the temporal trends in airborne pollen concentration monitored at the aerobiological stations which gathered the longest time-series (30–44 years) in the Benelux with a focus on the allergenic pollen taxa: Alnus, Corylus, Betula, Fraxinus, Quercus, Platanus, Poaceae, and Artemisia. Most arboreal species showed an overall trend toward an increase in the annual pollen integral and peak values and an overall trend toward an earlier start and end of the pollen season, which for Betula resulted in a significant decrease in season length. For the herbaceous species (Poaceae and Artemisia), the annual pollen integral and peak values showed a decreasing trend. The season timing of Poaceae showed a trend toward earlier starts and longer seasons in all locations. In all, these results show that temporal variations in pollen levels almost always follow a common trend in the Benelux, suggesting a similar force of climate change-driven factors, especially for Betula where a clear positive correlation was found between changes in temperature and pollen release over time. However, some trends were more local-specific indicating the influence of other environmental factors, e.g., the increasing urbanization in the surroundings of these monitoring locations. The dynamics in the observed trends can impact allergic patients by increasing the severity of symptoms, upsetting the habit of timing of the season, complicating diagnosis due to overlapping pollen seasons and the emergence of new symptoms due allergens that were weak at first.

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“…Thus, some authors have included Ulmus spp. in the category of winter flowering trees (Velasco‐Jiménez et al, 2020). In our study, the first inflorescences opened early in February.…”

Section: Discussionmentioning

confidence: 99%

The influence of tree management practices on phenological growth stages of Ulmus pumila L. (Siberian elm)

Amorós¹,

Mauri²,

Curt

2021

Annals of Applied Biology

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There is a growing interest in Ulmus pumila L. as a forest plant species in harsh environments, as well as a woody short‐rotation crop for biomass production in marginal lands. In countries where U. pumila is allochthonous, concerns have been raised on the easy spread of this species, on the grounds that it produces large quantities of wind‐dispersed fruits with high potential germination success. Knowledge of the phenological responses of this species to management practices is essential to evaluate the risk of invasion to adjacent lands. This work addresses the phenology of U. pumila according the BBCH scale and the effect of short‐rotation coppicing and plant density on phenological growth stages of this species. Results showed that there is little effect of plant density on the phenology of non‐managed trees grown in regular plantations. On the contrary, short‐rotation coppice influences greatly the vegetative and reproductive phenology of Siberian elm. High plant densities, winter harvesting and 2‐year rotation guarantee that fruit dispersal will not happen.

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Pollen season trends in winter flowering trees in South Spain

Cited by 17 publications

References 41 publications

Aeroallergens and Climate Change in Tulsa, Oklahoma: Long-Term Trends in the South Central United States

Aeroallergens and Climate Change in Tulsa, Oklahoma: Long-Term Trends in the South Central United States

Long-Term Pollen Monitoring in the Benelux: Evaluation of Allergenic Pollen Levels and Temporal Variations of Pollen Seasons

The influence of tree management practices on phenological growth stages of Ulmus pumila L. (Siberian elm)

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