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:	Article
Identification Number/DOI:	10.1016/j.envpol.2011.12.032
Programmes:	CEH Topics & Objectives 2009 onwards > 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 onwards > Biogeochemistry > BGC Topic 3 - Managing Threats to Environment and Health > BGC - 3.3 - Deliver effective advice, models and applied science ...
CEH Sections:	Reynard Emmett
ISSN:	0269-7491
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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