Regional and seasonal variation in airborne grass pollen levels between cities of Australia and New Zealand

Medek, Danielle E., Beggs, Paul J., Erbas, Bircan, Jaggard, Alison K., Campbell, Bradley C., Vicendese, Don, Johnston, Fay H., Godwin, Ian, Huete, Alfredo R., Green, Brett J., Burton, Pamela K., Bowman, David M.J.S., Newnham, Rewi M., Katelaris, Constance H., Haberle, Simon G., Newbigin, Ed, & Davies, Janet M. (2016) Regional and seasonal variation in airborne grass pollen levels between cities of Australia and New Zealand. Aerobiologia, 32(2), pp. 289-302.

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Although grass pollen is widely regarded as the major outdoor aeroallergen source in Australia and New Zealand (NZ), no assemblage of airborne pollen data for the region has been previously compiled. Grass pollen count data collected at 14 urban sites in Australia and NZ over periods ranging from 1 to 17 years were acquired, assembled and compared, revealing considerable spatiotemporal variability. Although direct comparison between these data is problematic due to methodological differences between monitoring sites, the following patterns are apparent. Grass pollen seasons tended to have more than one peak from tropics to latitudes of 37°S and single peaks at sites south of this latitude. A longer grass pollen season was therefore found at sites below 37°S, driven by later seasonal end dates for grass growth and flowering. Daily pollen counts increased with latitude; subtropical regions had seasons of both high intensity and long duration. At higher latitude sites, the single springtime grass pollen peak is potentially due to a cooler growing season and a predominance of pollen from C3 grasses. The multiple peaks at lower latitude sites may be due to a warmer season and the predominance of pollen from C4 grasses. Prevalence and duration of seasonal allergies may reflect the differing pollen seasons across Australia and NZ. It must be emphasized that these findings are tentative due to limitations in the available data, reinforcing the need to implement standardized pollen-monitoring methods across Australasia. Furthermore, spatiotemporal differences in grass pollen counts indicate that local, current, standardized pollen monitoring would assist with the management of pollen allergen exposure for patients at risk of allergic rhinitis and asthma. © 2015 Springer Science+Business Media Dordrecht

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ID Code: 87895
Item Type: Journal Article
Refereed: Yes
Keywords: Aerobiology, Australia, Grass pollen, Latitude, New Zealand, Plant distribution
DOI: 10.1007/s10453-015-9399-x
ISSN: 0393-5965
Divisions: Current > Schools > School of Biomedical Sciences
Current > Institutes > Institute of Health and Biomedical Innovation
Copyright Owner: Copyright 2015 Springer Science+Business Media Dordrecht
Deposited On: 30 Sep 2015 03:47
Last Modified: 26 May 2016 00:51

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