f14b9056-ccc0-4887-812e-c004f613a138 English ISO/IEC 8859-1 (also known as Latin 1) dataset dataset NERC EDS Environmental Information Data Centre Lancaster Environment Centre, Library Avenue, Bailrigg Lancaster LA1 4AP UK info@eidc.ac.uk https://eidc.ac.uk/ EIDC website The Environmental Information Data Centre (EIDC) is the UK's national data centre for terrestrial and freshwater sciences. information pointOfContact 2025-11-13T16:24:19 UK GEMINI 2.3 WGS 84 Photosynthesis of Trifolium repens versus Lolium perenne after ozone exposure in solardomes 2014-12-18 publication 2010-01-01 creation 1418144571060 CEH:EIDC: https://catalogue.ceh.ac.uk/id/f14b9056-ccc0-4887-812e-c004f613a138 10.5285/f14b9056-ccc0-4887-812e-c004f613a138 doi: Hayes, F., Mills, G., Ashmore, M. (2014). Photosynthesis of Trifolium repens versus Lolium perenne after ozone exposure in solardomes. NERC Environmental Information Data Centre 10.5285/f14b9056-ccc0-4887-812e-c004f613a138 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 & Hydrology Integrating Fund Initiative. Full details about this dataset can be found at https://doi.org/10.5285/f14b9056-ccc0-4887-812e-c004f613a138 UK Centre for Ecology & Hydrology enquiries@ceh.ac.uk pointOfContact Hayes, F. Centre for Ecology & Hydrology enquiries@ceh.ac.uk https://orcid.org/0000-0002-1037-5725 ORCID record ORCID is an open, non-profit, community-driven effort to create and maintain a registry of unique researcher identifiers and a transparent method of linking research activities and outputs to these identifiers. information author Mills, G. Centre for Ecology & Hydrology enquiries@ceh.ac.uk https://orcid.org/0000-0001-9870-2868 ORCID record ORCID is an open, non-profit, community-driven effort to create and maintain a registry of unique researcher identifiers and a transparent method of linking research activities and outputs to these identifiers. information author Ashmore, M. University of York mikeashmore@york.ac.uk author NERC EDS Environmental Information Data Centre info@eidc.ac.uk custodian NERC Environmental Information Data Centre info@eidc.ac.uk publisher UK Centre for Ecology & Hydrology enquiries@ceh.ac.uk owner notPlanned Atmospheric Conditions theme GEMET - INSPIRE themes, version 1.0 2008-06-01 publication Trifolium repens Lolium perenne Wikidata 2012-10-29 creation Abergwyngregyn GeoNames 2006-01-01 creation Pollution otherRestrictions no limitations otherRestrictions This resource is made available under the terms of the Open Government Licence otherRestrictions © UK Centre for Ecology & Hydrology otherRestrictions If you reuse this data, you should 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 textTable English utf8 biota 2007-04-30 2007-10-31 -4.018 -4.016 53.237 53.239 Comma-separated values (CSV) NERC EDS Environmental Information Data Centre info@eidc.ac.uk distributor https://data-package.ceh.ac.uk/data/f14b9056-ccc0-4887-812e-c004f613a138 Download the data Get a copy of this data download https://data-package.ceh.ac.uk/sd/f14b9056-ccc0-4887-812e-c004f613a138.zip Supporting information Supporting information available to assist in re-use of this dataset. information dataset dataset Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 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).