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Ozone pollution affects flower numbers and timing in a simulated BAP priority calcareous grassland community

Hayes, Felicity; Williamson, Jennifer; Mills, Gina. 2012 Ozone pollution affects flower numbers and timing in a simulated BAP priority calcareous grassland community. Environmental Pollution, 163. 40-47. 10.1016/j.envpol.2011.12.032

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Abstract/Summary

Mesocosms representing the BAP Priority habitat ‘Calcareous Grassland’ were exposed to eight ozone profiles for twelve-weeks in two consecutive years. Half of the mesocosms received a reduced watering regime during the exposure periods. Numbers and timing of flowering in the second exposure period were related to ozone concentration and phytotoxic ozone dose (accumulated stomatal flux). For Lotus corniculatus, ozone accelerated the timing of the maximum number of flowers. An increase in mean ozone concentration from 30 ppb to 70 ppb corresponded with an advance in the timing of maximum flowering by six days. A significant reduction in flower numbers with increasing ozone was found for Campanula rotundifolia and Scabiosa columbaria and the relationship with ozone was stronger for those that were well-watered than for those with reduced watering. These changes in flowering timing and numbers could have large ecological impacts, affecting plant pollination and the food supply of nectar feeding insects.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1016/j.envpol.2011.12.032
Programmes: CEH Topics & Objectives 2009 - 2012 > Biogeochemistry > BGC Topic 1 - Monitoring and Interpretation of Biogeochemical and Climate Changes > BGC - 1.4 - Develop innovative, effective methods for monitoring fluxes, exposure and effects
CEH Topics & Objectives 2009 - 2012 > Biogeochemistry > BGC Topic 3 - Managing Threats to Environment and Health > BGC - 3.3 - Deliver effective advice, models and applied science ...
CEH Sections: Emmett
Reynard
ISSN: 0269-7491
Additional Information. Not used in RCUK Gateway to Research.: The attached document is the author’s version of a work that was accepted for publication in Environmental Pollution. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Environmental Pollution, 163. 40-47. 10.1016/j.envpol.2011.12.032
Additional Keywords: ozone, accelerated flowering, stomatal flux, drought, phenology
NORA Subject Terms: Botany
Ecology and Environment
Atmospheric Sciences
Date made live: 12 Jan 2012 11:59
URI: http://nora.nerc.ac.uk/id/eprint/16276

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