scholarly journals Ragweed pollen production and dispersion modelling within a regional climate system, calibration and application over Europe

2016 ◽  
Vol 13 (9) ◽  
pp. 2769-2786 ◽  
Author(s):  
Li Liu ◽  
Fabien Solmon ◽  
Robert Vautard ◽  
Lynda Hamaoui-Laguel ◽  
Csaba Zsolt Torma ◽  
...  
Keyword(s):  
Exposure Time ◽  
Airborne Pollen ◽  
Regional Climate ◽  
Ambrosia Artemisiifolia ◽  
Plant Distribution ◽  
Ragweed Pollen ◽  
Pollen Production ◽  
Common Ragweed ◽  
Community Land Model ◽  
Pollen Concentrations

Abstract. Common ragweed (Ambrosia artemisiifolia L.) is a highly allergenic and invasive plant in Europe. Its pollen can be transported over large distances and has been recognized as a significant cause of hay fever and asthma (D'Amato et al., 2007; Burbach et al., 2009). To simulate production and dispersion of common ragweed pollen, we implement a pollen emission and transport module in the Regional Climate Model (RegCM) version 4 using the framework of the Community Land Model (CLM) version 4.5. In this online approach pollen emissions are calculated based on the modelling of plant distribution, pollen production, species-specific phenology, flowering probability, and flux response to meteorological conditions. A pollen tracer model is used to describe pollen advective transport, turbulent mixing, dry and wet deposition. The model is then applied and evaluated on a European domain for the period 2000–2010. To reduce the large uncertainties notably due to the lack of information on ragweed density distribution, a calibration based on airborne pollen observations is used. Accordingly a cross validation is conducted and shows reasonable error and sensitivity of the calibration. Resulting simulations show that the model captures the gross features of the pollen concentrations found in Europe, and reproduce reasonably both the spatial and temporal patterns of flowering season and associated pollen concentrations measured over Europe. The model can explain 68.6, 39.2, and 34.3 % of the observed variance in starting, central, and ending dates of the pollen season with associated root mean square error (RMSE) equal to 4.7, 3.9, and 7.0 days, respectively. The correlation between simulated and observed daily concentrations time series reaches 0.69. Statistical scores show that the model performs better over the central Europe source region where pollen loads are larger and the model is better constrained. From these simulations health risks associated to common ragweed pollen spread are evaluated through calculation of exposure time above health-relevant threshold levels. The total risk area with concentration above 5 grains m−3 takes up 29.5 % of domain. The longest exposure time occurs on Pannonian Plain, where the number of days per year with the daily concentration above 20 grains m−3 exceeds 30.

scholarly journals Estimates of common ragweed pollen emission and dispersion over Europe using RegCM-pollen model

2015 ◽  
Vol 12 (21) ◽  
pp. 17595-17641 ◽  
Author(s):  
L. Liu ◽  
F. Solmon ◽  
R. Vautard ◽  
L. Hamaoui-Laguel ◽  
Cs. Zs. Torma ◽  
...  
Keyword(s):  
Exposure Time ◽  
Invasive Plant ◽  
Airborne Pollen ◽  
Ambrosia Artemisiifolia ◽  
Plant Distribution ◽  
Ragweed Pollen ◽  
Pollen Emission ◽  
Common Ragweed ◽  
Community Land Model ◽  
Pollen Concentrations

Abstract. Common ragweed (Ambrosia artemisiifolia L.) is a highly allergenic and invasive plant in Europe. Its pollen can be transported over large distances and has been recognized as a significant cause of hayfever and asthma (D'Amato et al., 2007; Burbach et al., 2009). To simulate production and dispersion of common ragweed pollen, we implement a pollen emission and transport module in the Regional Climate Model (RegCM) version 4 using the framework of the Community Land Model (CLM) version 4.5. In the online model environment where climate is integrated with dispersion and vegetation production, pollen emissions are calculated based on the modelling of plant distribution, pollen production, species-specific phenology, flowering probability, and flux response to meteorological conditions. A pollen tracer model is used to describe pollen advective transport, turbulent mixing, dry and wet deposition. The model is then applied and evaluated on a European domain for the period 2000–2010. To reduce the large uncertainties notably due to ragweed density distribution on pollen emission, a calibration based on airborne pollen observations is used. Resulting simulations show that the model captures the gross features of the pollen concentrations found in Europe, and reproduce reasonably both the spatial and temporal patterns of flowering season and associated pollen concentrations measured over Europe. The model can explain 68.6, 39.2, and 34.3 % of the observed variance in starting, central, and ending dates of the pollen season with associated root mean square error (RMSE) equal to 4.7, 3.9, and 7.0 days, respectively. The correlation between simulated and observed daily concentrations time series reaches 0.69. Statistical scores show that the model performs better over the central Europe source region where pollen loads are larger. From these simulations health risks associated common ragweed pollen spread are then evaluated through calculation of exposure time above health-relevant threshold levels. The total risk area with concentration above 5 grains m−3 takes up 29.5 % of domain. The longest exposure time occurs on Pannonian Plain, where the number of days per year with the daily concentration above 20 grains m−3 exceeds 30.

scholarly journals 2350 Creating a comprehensive municipal inventory of common ragweed (Ambrosia artemisiifolia) to predict allergenic pollen exposures

2018 ◽  
Vol 2 (S1) ◽  
pp. 7-7
Author(s):  
Daniel S. W. Katz ◽  
Stuart Batterman
Keyword(s):  
Remote Sensing ◽  
Management Practices ◽  
Airborne Pollen ◽  
Ambrosia Artemisiifolia ◽  
Allergenic Pollen ◽  
Pollen Production ◽  
Common Ragweed ◽  
Lack Of Information ◽  
Pollen Concentrations ◽  
The City

OBJECTIVES/SPECIFIC AIMS: One of the key difficulties in predicting allergenic pollen exposures has been a lack of information on source plant location and abundance. However, the increasing availability of spatially explicit data from remote sensing offers new opportunities to create comprehensive inventories of allergenic pollen producing plants. METHODS/STUDY POPULATION: In this study, we use a spatially oriented field survey to map common ragweed (Ambrosia artemisiifolia) in Detroit, MI, USA. We then combine this with remote sensing imagery and LiDAR to predict ragweed presence and potential pollen production across 344 km2 of Detroit. Finally, we compare this with measurements of airborne pollen concentrations collected throughout the city. RESULTS/ANTICIPATED RESULTS: Our initial results show that ragweed is present in ~2% of the city, and its presence and abundance are strongly associated with demolished building (p<0.001). The uneven distribution of ragweed plants across the city leads to substantially higher pollen concentrations in neighborhoods where more buildings have been recently demolished. DISCUSSION/SIGNIFICANCE OF IMPACT: Our approach offers an effective way to quantify allergenic pollen production, airborne concentrations, and exposures across a large metropolitan area. This in turn provides insight on how to best reduce airborne pollen concentrations: in this case, by changing post-demolition land management practices.

Rising CO2 and pollen production of common ragweed (Ambrosia artemisiifolia L.), a known allergy-inducing species: implications for public health.

2000 ◽  
Vol 27 (10) ◽  
pp. 893 ◽  
Author(s):  
Lewis H. Ziska ◽  
Frances A. Caulfield
Keyword(s):  
Public Health ◽  
Atmospheric Carbon Dioxide ◽  
Carbon Dioxide Concentration ◽  
Ambrosia Artemisiifolia ◽  
Pollen Production ◽  
Potential Growth ◽  
Plant Weight ◽  
Common Ragweed ◽  
Total Plant ◽  
The Impact

Although environmental factors such as precipitation and temperature are recognized as influencing pollen production, the impact of rising atmospheric carbon dioxide concentration ([CO2]) on the potential growth and pollen production of hay-fever-inducing plants is unknown. Here we present measurements of growth and pollen production of common ragweed (Ambrosia artemisiifolia L.) from pre-industrial [CO2] (280 mol mol–1) to current concentrations (370 mol mol–1) to a projected 21st century concentration (600 mol mol–1). We found that exposure to current and elevated [CO2] increased ragweed pollen production by 131 and 320%, respectively, compared to plants grown at pre-industrial [CO2]. The observed stimulations of pollen production from the pre-industrial [CO2] were due to an increase in the number (at 370 mol mol–1) and number and size (at 600 mol mol–1) of floral spikes. Overall, floral weight as a percentage of total plant weight decreased (from 21% to 13%), while investment in pollen increased (from 3.6 to 6%) between 280 and 600 mol mol–1 CO2. Our results suggest that the continuing increase in atmospheric [CO2] could directly influence public health by stimulating the growth and pollen production of allergy-inducing species such as ragweed.

scholarly journals The origin and worldwide distribution of regweed

2014 ◽  
Vol 3 (2) ◽  
pp. 395-413
Author(s):  
László Makra ◽  
István Matyasovszky ◽  
Károly Bodnár ◽  
Gábor Tusnády
Keyword(s):  
Ambrosia Artemisiifolia ◽  
Pollen Production ◽  
Po River ◽  
Climate Conditions ◽  
Worldwide Distribution ◽  
Pannonian Plain ◽  
Pollen Concentrations ◽  
The Usa ◽  
History Of ◽  
Unites States

The aim of the study is to provide a survey on the history of ragweed worldwide. Its climate dependence, impacts in agriculture, health effects and social costs are also presented. In Europe common ragweed (Ambrosia artemisiifolia) is predominant of all Ambrosia species that is supported by population genetic data. The most important habitat areas of ragweed and the highest pollen concentrations occur, in decreasing order of the pollen levels (1) in the south-western part of the European Russia, (2) in the southern and eastern parts of Ukraine, (3) in the Pannonian Plain in Central Europe, (4) in the Rhône-Alpes region in France, furthermore (5) in the Po River valley in Italy. Besides Europe, ragweed occurs in China, India, Japan and in other Asian countries, furthermore in Australia and the Unites States of America. However, beyond the USA little information is available. Warming trends due to the climate change favours the expansion of ragweed, producing higher pollen levels worldwide. In association with the warming, increasing ambient CO2 levels generate greater biomass and increased pollen production. Hence, ragweed pollen production can be expected to increase significantly under predicted future climate conditions, bringing severe impacts to areas that have yet been suffering slightly.

scholarly journals Heat wave event facilitates defensive responses in invasive C3 plant Ambrosia artemisiifolia L. under elevated CO2 concentration to the detriment of insect herbivores

2021 ◽  
Author(s):  
Zhenya Tian ◽  
Chao Ma ◽  
Chenchen Zhao ◽  
Yan Zhang ◽  
Xuyuan Gao ◽  
...  
Keyword(s):  
Heat Wave ◽  
Species Interactions ◽  
Invasive Plant ◽  
Poor Performance ◽  
Ambrosia Artemisiifolia ◽  
Plant Distribution ◽  
C3 Plant ◽  
Common Ragweed ◽  
Heat Wave Event ◽  
Wave Event

AbstractTo predict and mitigate the effects of climate change on communities and ecosystems, the joint effects of extreme climatic events on species interactions need to be understood. Using the common ragweed (Ambrosia artemisiifolia L.)—leaf beetle (Ophraella communa) system, we investigated the effects of heat wave and elevated CO2 on common ragweed growth, secondary metabolism, and the consequent impacts on the beetle. The results showed that elevated CO2 and heat wave facilitated A. Artemisiifolia growth; further, A. artemisiifolia accumulated large amounts of defensive secondary metabolites. Being fed on A. artemisiifolia grown under elevated CO2 and heat wave conditions resulted in the poor performance of O. communa (high mortality, long development period, and low reproduction). Overall, under elevated CO2, heat wave improved the defensive ability of A. artemisiifolia against herbivores. This implies that heat wave event will relieve harm of A. artemisiifolia to human under elevated CO2. On the other hand, super adaptability to climatic changes may aggravate invasive plant distribution, posing a challenge to the control of invasive plants in the future.

scholarly journals Pollen Production of Quercus in the North-Western Iberian Peninsula and Airborne Pollen Concentration Trends during the Last 27 Years

Forests ◽  
2020 ◽  
Vol 11 (6) ◽  
pp. 702
Author(s):  
María Fernández-González ◽  
Estefanía González-Fernández ◽  
Helena Ribeiro ◽  
Ilda Abreu ◽  
F. Javier Rodríguez-Rajo
Keyword(s):  
Climate Change ◽  
Airborne Pollen ◽  
Pollen Grains ◽  
Maximum Temperature ◽  
Pollen Production ◽  
Pollen Monitoring ◽  
Main Pollen Season ◽  
Pollen Concentrations ◽  
Oak Pollen ◽  
The Impact

Natural forests are considered a reservoir of great biological diversity constituting one of the most important ecosystems in Europe. Quercus study is essential to assess ecological conservation of forests, and also of economic importance for different industries. In addition, oak pollen can cause high sensitization rates of respiratory allergies in pollen-allergy sufferers. This study sought to know the pollen production of six oak species in the transitional area between the Eurosiberian and Mediterranean Bioclimatic Regions, and to assess the impact of climate change on airborne oak pollen concentrations. The study was conducted in Ourense (NW Spain) over the 1993–2019 period. A Lanzoni VPPS 2000 volumetric trap monitored airborne pollen. A pollen production study was carried out in ten trees randomly selected in several Quercus forest around the Ourense city. Oak pollen represented around 14% of annual total pollen registered in the atmosphere of Ourense, showing an increasing trend during the last decade. Pollen production of the six studied oak species follow the proportions 1:1:2:5:90:276 for Q. ilex, Q. faginea, Q. rubra, Q. suber, Q. pyrenaica, and Q. robur respectively. We detected a significant trend to the increase of the annual maximum temperature, whereas a decrease of the maximum and mean temperatures during three previous months to oak flowering. This could be related with the detected trend to a delay of the oak Main Pollen Season onset of 0.47 days per year. We also found significant trends to an increase of the annual pollen integral of 7.9% pollen grains per year, and the pollen peak concentration of 7.5% pollen grains per year. Quercus airborne pollen monitoring as well as the knowledge of the reproductive behavior of the main oak species, bring us an important support tool offering a promising bio-indicator to detect ecological variations induced by climate change.

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