Hayes, F.; Mills, G.; Ashmore, M.

Photosynthesis of Trifolium repens versus Lolium perenne after ozone exposure in solardomes

The dataset consists of ACi (net CO2 assimilation rate, A, versus calculated substomatal CO2 concentration, Ci) curve data from an ozone experiment during which Trifolium repens and Lolium perenne were exposed as both monocultures and two-species mixtures to an episodic rural ozone regime in large, well-watered containers within solardomes for 12 weeks. Treatments were elevated ozone (AOT40 (Accumulated Ozone Threshold exposure of 40 parts per billion) of 12.86 ppm h) or control conditions (AOT40 of 0.02 ppm h). ACi curves were carried out mid-way and at the end of the exposure period using a Portable Photosynthesis System, CIRAS (PP-Systems) to calculate the photosynthetic parameters Jmax (maximum rate of photosynthetic electron transport) and Vcmax (maximum rate of Rubisco carboxylase activity). The observed decreases in photosynthetic efficiency and capacity in elevated ozone indicate that the ability of such ubiquitous vegetation to act as a sink for atmospheric carbon may be reduced in future climates. The experiment was carried out at the CEH Bangor Air Pollution Facility. This work was funded by the Centre for Ecology and Hydrology Integrating Fund Initiative.

Publication date: 2014-12-18

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Supporting documentation

Format of the dataset : Comma-separated values (CSV)

This dataset is made available under the terms of the Open Government Licence

You must cite: Hayes, F.; Mills, G.; Ashmore, M. (2014). Photosynthesis of Trifolium repens versus Lolium perenne after ozone exposure in solardomes. NERC Environmental Information Data Centre. https://doi.org/10.5285/f14b9056-ccc0-4887-812e-c004f613a138

 

© Centre for Ecology & Hydrology (Natural Environment Research Council)

This dataset is part of the following

Where/When

Study area
Temporal extent
2007-04-30    to    2007-10-31

Supplemental information

Other useful information regarding this dataset:

Hayes, Felicity; Mills, Gina; Ashmore, Mike. 2010 How much does the presence of a competitor modify the within-canopy distribution of ozone-induced senescence and visible injury? Water, Air and Soil Pollution, 210. 265-276.
Hayes,F.; Mills, G.; Ashmore, M.. 2009 Effects of ozone on inter- and intra-species competition and photosynthesis in mesocosms of Lolium perenne and Trifolium repens. Environmental Pollution, 157 (1). 208-214.

Provenance & quality

Trifolium repens and Lolium perenne were exposed as both monocultures and two-species mixtures to an episodic rural ozone regime in large, well-watered containers within solardomes for 12 weeks. Treatments were elevated ozone (AOT40 of 12.86 ppm h) or control conditions (AOT40 of 0.02 ppm h). After 6 weeks there was decreased photosynthetic capacity for T. repens, however, by the end of the exposure there was also decreased photosynthetic capacity of L. perenne, a species previously considered insensitive to ozone. The observed decreases in photosynthetic efficiency and capacity in elevated ozone indicate that the ability of such ubiquitous vegetation to act as a sink for atmospheric carbon may be reduced in future climates. ACi curves were carried out mid-way and at the end of the exposure period using a Portable Photosynthesis System, CIRAS (PP-Systems).

Correspondence/contact details

Centre for Ecology and Hydrology
enquiries@ceh.ac.uk

Authors

Hayes, F.
Centre for Ecology and Hydrology
Mills, G.
Centre for Ecology and Hydrology
Ashmore, M.
University of York

Other contacts

Custodian
Environmental Information Data Centre
eidc@ceh.ac.uk
Publisher
NERC Environmental Information Data Centre
eidc@ceh.ac.uk

Spatial

Spatial representation type
Tabular (text)
Spatial reference system
WGS 84

Tags

Topic categories
Biota
Keywords
Abergwyngregyn grassland,  Lolium perenne Pollution Pollution & Environmental Risk productivity,  solardome,  solar domes,  Trifolium repens vegetation
INSPIRE Theme
Atmospheric Conditions