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

Ziska, Lewis H.; Caulfield, Frances

doi:10.1071/pp00032

Cited by 143 publications

(160 citation statements)

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“…Different authors have shown how warming can affect reproductive physiology and phenology of plants (Menzel et al 2006, Gordo and Sanz 2009. For example, it can cause an increase in pollen production (Zhang et al 2014), which is also a consequence of increasing concentrations of atmospheric CO 2 (Ziska and Caulfield 2000, Hamaoui-Laguel et al 2015, Ziska and Ebi 2015, and/or an advance in flowering time (Walther et al 2002). This study shows how, in Perugia, this kind of advance has been clearly evidenced in grasses but, conversely, a decreasing API has been detected (Fig.…”

Section: Discussionsupporting

confidence: 38%

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: 38%

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

et al. 2016

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“…Increased stand-level reproduction and higher reproductive allocation of subordinates at elevated CO 2 could amplify the stimulation of allergenic pollen production observed in singly grown ragweed plants (Wayne et al 2002;Ziska et al 2000). More homogeneous reproduction between subordinates and dominants also implies that a larger number of individuals will contribute propagules to future generations.…”

Section: Discussionmentioning

confidence: 95%

“…Ragweed pollen is one of the most problematic aero-allergens throughout its range, and CO 2 -induced enhancements to growth and reproduction in A. artemisiifolia have raised concerns about its future status as an allergenic and agricultural pest (Ziska et al 2000). We hypothesized that under elevated CO 2 , shaded ragweed subordinates would gain proportionally more biomass than light-saturated dominants, thereby minimizing size inequalities in populations.…”

Section: Introductionmentioning

confidence: 99%

CO2 enrichment reduces reproductive dominance in competing stands of Ambrosia artemisiifolia (common ragweed)

Stinson

Bazzaz

2005

Oecologia

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Plants growing in dense stands may not equally acquire or utilize extra carbon gained in elevated CO(2). As a result, reproductive differences between dominant and subordinate plants may be altered under rising CO(2) conditions. We hypothesized that elevated CO(2) would enhance the reproductive allocation of shaded, subordinate Ambrosia artemisiifolia L. (Asteraceae) individuals more than that of light-saturated dominants. We grew stands of A. artemisiifolia at either 360 or 720 muL L(-1) CO(2) levels and measured the growth and reproductive responses of competing individuals. To test whether elevated CO(2) altered size and reproductive inequalities within stands, we compared stand-level coefficients of variation (CV) in height growth and final shoot, root, and reproductive organ biomasses. Elevated CO(2) enhanced biomass and reduced the CV for all aspects of plant growth, especially reproductive biomass. Allocation to reproduction was higher in the elevated CO(2) than in the ambient treatment, and this difference was more pronounced in small, rather than large plant positive relationships between the CV and total stand productivity declined under elevated CO(2), indicating that growth enhancements to smaller plants diminished the relative biomass advantages of larger plants in increasingly crowded conditions. We conclude that elevated CO(2) stimulates stand-level reproduction while CO(2)-induced growth gains of subordinate A. artemisiifolia plants minimize differences in the reproductive output of small and large plants. Thus, more individuals are likely to produce greater amounts of seeds and pollen in future populations of this allergenic weed.

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“…For instance, in forestry or agriculture, they can help in forecasting the future crop yield and the size of fruit and seed production (Allison 1990;Faegri and Iversen 1989;McKone 1990;Westgate et al 2003). Pollen production is sensitive to environmental variability (Jablonski et al 2002;LaDeau and Clark 2006;Rogers et al 2006;Wan et al 2002;Wayne et al 2002;Ziska and Caulfield 2000); given this sensitivity, monitoring pollen from different responsive species may provide means for monitoring and evaluating local and/or global environmental changes. Moreover, the type and extent of the airborne and deposited pollen can provide information on present and past (more recent or remote) vegetation (Moore et al 1991;Rogers 1993;Subba Reddi and Reddi 1986).…”

Section: Introductionmentioning

confidence: 98%

Effects of environmental factors on pollen production in anemophilous woody species

Damialis

Fotiou

Halley

et al. 2010

Trees

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The aim of this study was to estimate the amount of pollen produced by anemophilous woody taxa with allergenic properties and with considerable contribution in the concentration of pollen in the air of a Mediterranean city (Thessaloniki, Greece). The taxa selected are Corylus avellana, Cupressus sempervirens var. horizontalis and var. pyramidalis, Olea europaea and Platanus orientalis; each was studied in more than one sampling stations differing in elevation, direction or both. O. europaea produced the highest number of pollen grains per flower (1.3 9 10 5 ± 0.1 9 10 5 ) and P. orientalis the highest per inflorescence (3.3 9 10 6 ± 0.2 9 10 6 ). At the level of crown, pollen grains produced were of the order of 10 9 per surface/volume unit for O. europaea and the two C. sempervirens varieties; for the other two taxa, they were of the order of 10 6 . Pollen production was lower at higher elevation and northern direction and depended on the size of the floral unit sampled (flower for O. europaea, inflorescence for all other species): the bigger the floral unit, the more pollen it contained. Our results and reports from other areas, where C. sempervirens and O. europaea grow, show that these two Mediterranean species produce comparable amounts of pollen at the levels of inflorescence or flower, respectively, wherever they occur.

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

Cited by 143 publications

References 0 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

CO2 enrichment reduces reproductive dominance in competing stands of Ambrosia artemisiifolia (common ragweed)

Effects of environmental factors on pollen production in anemophilous woody species

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