Dr. Doug Warner's extended publications list

• Warner, D.J., Davies, M., Hipps, N., Tzilivakis, J., Lewis, K.A. and Fountain, M. (2026) Integrated weed management reduces the environmental impact of urban amenity weed control. Weed Science. In press.
• Nichols, R.N., Begg, G.S., Cantú-Salazar, L., Holland, J.M., Martin, Y., Tzilivakis, J., Vray, S., Warner, D.J., Zuta, A., McHugh, N.M. (2026). A standardised protocol for measuring farmland biodiversity outcomes across European Farmer Cluster landscapes. PLoS One, 21(3): e0345691. [DOI].
• Warner, D. & Tzilivakis, J. (2024). Novel DST for Agrobiodiversity Management: Deliverable D5.3 report for the Framework project: Farmers clusters for realising agrobiodiversity management across ecosystems (SFS-01-2018-2019-2020). DOI.
• Tzilivakis, J., Warner, D., Grebot, B. & Limmer, C. (2024). Technical assistance for preliminary work on Livestock Operating Rules for the Industrial Emissions Directive: Best Available Techniques: Task 1 Report. European Commission, Brussels.
• Tzilivakis, J., Warner, D., Grebot, B. & Limmer, C. (2024). Technical assistance for preliminary work on Livestock Operating Rules for the Industrial Emissions Directive: Best Available Techniques: Task 4 Report. European Commission, Brussels.
• Tzilivakis, J., Taylor, J.L., Green, A., Warner, D.J & Lewis, K.A. (2024). A methodological review of UK food ecolabels. Final report. Prepared for the Consortium for Labelling for the Environment, Animal welfare, and Regenerative farming (CLEAR) by the Agriculture and Environment Research Unit (AERU), University of Hertfordshire, United Kingdom. [Download].
• Warner, D. & Tzilivakis, J. (2022). Database of metrics and indicators of farmland biodiversity and ecosystem services: Deliverable D5.2 report for the Framework project: Farmers clusters for realising agrobiodiversity management across ecosystems (SFS-01-2018-2019-2020). European Commission, Brussels. DOI.
• Mondière, A., Tzilivakis, J., Warner, D.J., van der Werf, H.M.G., Farruggia, A., Glinec, O. & Corson, M.S (2022). An improved indicator framework to assess and optimise ecosystem services provided by permanent grasslands. Ecological Indicators, 146, 109765. DOI.
• Tzilivakis, J. & Warner, D. (2021). WP5: Biodiversity management and monitoring: DST development. 1st Annual General Assembly of the H2020 Framework project.
• Tzilivakis, J., Warner, D., Green, A., & Lewis, K.A. (2021). A broad-scale spatial analysis of the environmental benefits of fertiliser closed periods implemented under the Nitrates Directive in Europe. Journal of Environmental Management, 299: 113674. DOI.
• Wilkes, T.I., Warner, D.J., Edmonds-Brown, V., Davies, K.G. & Denholm, I. (2021). Zero tillage systems conserve arbuscular mycorrhizal fungi, enhancing soil glomalin and water stable aggregates with implications for soil stability. Soil Systems, 5(1): 4. DOI.
• Lewis, K.A., Tzilivakis, J., Green, A. & Warner, D. (2021). Procurement of nitrate accounting tools for the Poole Harbour Nutrient Management Scheme. Final report.
• Warner, D., Tzilivakis, J., Almenar, J.B., Cantú-Salazar, L., Keillor, B. & Simmons, A. (2021). Definition of requirement of the FEAST decision support tool: Deliverable 5.1 report for the Framework project: Farmers clusters for realising agrobiodiversity management across ecosystems (SFS-01-2018-2019-2020).
• Tzilivakis, J., Green, A., Warner, D.J. & Lewis, K.A. (2020). Identification of approaches and measures in action programmes under Directive 91/676/EEC. Final report. Report prepared for Directorate-General Environment, European Commission, for project ENV.D.1/SER/2018/0017 by the Agriculture and Environment Research Unit (AERU), University of Hertfordshire, United Kingdom. [Download].
• Tzilivakis, J., Green, A., Warner, D.J. & Lewis, K.A. (2020). Identification of approaches and measures in action programmes under Directive 91/676/EEC. Final report: Annex A: Comparison of implementation and environmental characterisation of NAP measures. Report prepared for Directorate-General Environment, European Commission, for project ENV.D.1/SER/2018/0017 by the Agriculture and Environment Research Unit (AERU), University of Hertfordshire, United Kingdom. [Download].
• Tzilivakis, J., Green, A., Warner, D.J. & Lewis, K.A. (2020). Identification of approaches and measures in action programmes under Directive 91/676/EEC. Final report: Annex B: Nitrate Action Programme characterisation scoring and aggregation methods. Report prepared for Directorate-General Environment, European Commission, for project ENV.D.1/SER/2018/0017 by the Agriculture and Environment Research Unit (AERU), University of Hertfordshire, United Kingdom. [Download].
• Tzilivakis, J., Green, A., Warner, D.J. & Lewis, K.A. (2020). Identification of approaches and measures in action programmes under Directive 91/676/EEC. Final report: Annexes C1-28: Austria to United Kingdom. Report prepared for Directorate-General Environment, European Commission, for project ENV.D.1/SER/2018/0017 by the Agriculture and Environment Research Unit (AERU), University of Hertfordshire, United Kingdom. [Download].
• Tzilivakis, J., Green, A., Warner, D.J. & Lewis, K.A. (2020). Identification of approaches and measures in action programmes under Directive 91/676/EEC. Final report: Annex D: Risk characterisation of all Nitrate Action Programmes. Report prepared for Directorate-General Environment, European Commission, for project ENV.D.1/SER/2018/0017 by the Agriculture and Environment Research Unit (AERU), University of Hertfordshire, United Kingdom.
• Warner, D.J. & Lewis, K.A. (2019). Evaluation of the Risks of Contaminating Low Erucic Acid Rapeseed with High Erucic Rapeseed and Identification of Mitigation Strategies. Agriculture, 9(9), 190. DOI
• Tzilivakis, J., Warner, D.J. & Holland, J.M. (2019). Developing practical techniques for quantitative assessment of ecosystem services on farmland. Ecological Indicators, 106: 105514. DOI
• Warner, D.J., Lewis, K. & Tzilivakis, J. (2019). Stormwater harvesting and flood mitigation: A UK perspective. In: Jegatheesan, V., Goonetilleke, A., van Leeuwen, J., Kandasamy, J., Warner, D., Myers, B. Bhuiyan, M., Spence, K. & Parker, G. eds. Urban Stormwater and Flood Management: Enhancing the Liveability of Cities. Cham, Switzerland: Springer Nature, pp. 29-47. DOI
• Lewis, K., Warner, D.J. & Tzilivakis, J. (2019). Stormwater harvesting. In: Jegatheesan, V., Goonetilleke, A., van Leeuwen, J., Kandasamy, J., Warner, D., Myers, B. Bhuiyan, M., Spence, K. & Parker, G. eds. Urban Stormwater and Flood Management: Enhancing the Liveability of Cities. Cham, Switzerland: Springer Nature, pp. 119-137. DOI
• Warner, D.J., Tzilivakis, J., Green, A., Charlton, D. & Lewis, K.A. (2019). Determining the climate change mitigation potential of Countryside Stewardship. World Journal of Agriculture and Soil Science Change, 1(2), DOI
• Tzilivakis, J., Warner, D., Green, A. & Lewis, K. (2019). Spatial analysis of the benefits and burdens of Ecological Focus Areas for water-related ecosystem services vulnerable to climate change in Europe. Mitig. Adapt. Strateg. Glob. Change, 24(2): 205-233. DOI
• Lewis, K.A., Tzilivakis, J., Warner, D.J. & Green, A. (2018). Agri-environmental Management in Europe: Sustainable Challenges and Solutions - From Policy Interventions to Practical Farm Management.. 5m Publishing, Sheffield, UK. ISBN: 1912178443
• Green, A., Lewis, K.A., Tzilivakis, J. & Warner D.J. (2017). Agricultural climate change mitigation: carbon calculators as a guide for decision making. International Journal of Agricultural Sustainability, 15(6): 645-661. DOI
• Green, A., Tzilivakis, J., Warner, D. & Lewis, K. (2017). Problems of Benchmarking Greenhouse Gas Emissions in Dairy Agriculture. Benchmarking: An International Journal, 24(6): 1470-1489. DOI
• Tzilivakis, J., Warner, D.J., Green, A. & Lewis, K.A. (2017). Spatial and temporal variability of greenhouse gas emissions from rural development land use operations. Mitigation and Adaptation Strategies for Global Change, 22(3): 447-467. DOI.
• Warner, D., Tzilivakis, J., Green, A. & Lewis, K. (2017). Ecological Focus Areas and beneficial insect (Coleoptera: Carabidae) conservation for pest control: habitat suitability and farm specific factors. In: G. Begg, F. Bianchi, N. Birch, B. Gerowitt, J. Holland, D. Lupi, C. Moonen, M. Ramsden & P. van Rijn (Eds.), Proceedings of the 7th IOBC-WPRS Working Group meeting on Landscape Management for Functional Biodiversity (IOBC-WPRS Bulletin vol. 122). Dundee (Scotland, UK), 29-31 March, 6-10.
• Warner, D., Tzilivakis, J., Green, A. & Lewis, K. (2017). Prioritising agri-environment options for greenhouse gas mitigation. International Journal of Climate Change Strategies and Management, 9(1): 104-122. DOI.
• Warner, D.J., Tzilivakis, J., Green, A. & Lewis, K.A. (2016). Rural Development Program measures on cultivated land in Europe to mitigate greenhouse gas emissions – regional “hotspots” and priority measures. Carbon Management, 7(3-4): 205-219. DOI.
• Lewis, K.A., Tzilivakis, J., Warner, D. & Green, A. (2016). An international database for pesticide risk assessments and management. Human and Ecological Risk Assessment: An International Journal, 22(4): 1050-1064. DOI.
• Tzilivakis, J., Warner, D.J., Green, A., Lewis, K.A. & Angileri, V. (2016). An indicator framework to help maximise potential benefits for ecosystem services and biodiversity from ecological focus areas. Ecological Indicators, 69: 859-872. DOI.
• Tzilivakis, J., Warner, D., Green, A. & Lewis, K.A. (2015). Adapting to climate change: Assessing the vulnerability of ecosystem services in Europe in the context of rural development. Mitigation and Adaptation Strategies for Global Change, 20(4): 547-572. DOI.
• Lewis, K.A., Tzilivakis, J., Green, A. & Warner, D.J. (2015). The potential of feed additives to improve the environmental impact of European livestock farming: A multi-issue analysis. International Journal of Agricultural Sustainability, 13(1): 55-68. DOI.
• Tzilivakis, J., Green, A., Lewis, K.A. & Warner, D.J (2014). Identifying integrated options for agricultural climate change mitigation. International Journal of Climate Change Strategies and Management, 6(2): 192-211. DOI.
• Warner, D.J. (2014). Towards Developing Guidance Notes for Integrated Approaches to Amenity Weed Control. Presented twice on 11 February 2014 University of Hertfordshire & 25 February 2014 Lancaster University.
• Green, A., Warner, D.J., Tzilivakis, J., & Lewis, K.A. (2014). A Comparison of Carbon Accounting Tools and an Evaluation of Their Potential for Greenhouse Gas Mitigation. In: M. Hassouna & N. Guingand (Eds.), Emission of Gas and Dust from Livestock. (pp. 237-240). RMT Élevage et Environnement, Le Rheu, France.
• Warner, D.J., Green, A., Tzilivakis, J., & Lewis, K.A. (2014). Agricultural Greenhouse Gas Emissions Reduced by Agri-Environment Schemes on Improved Grassland Grazed by Intensive Beef Cattle. In: M. Hassouna & N. Guingand (Eds.), Emission of Gas and Dust from Livestock. (pp. 237-240). RMT Élevage et Environnement, Le Rheu, France.
• Fountain, M., Hookey, J., Mounter, D. & Warner, D.J. (2014). Development of zero and minimal herbicide regimes for controlling weeds on hard surfaces and determining their emissions and effectiveness and comparisons with more traditional approaches. Towards Developing Guidance Notes for Integrated Approaches to Amenity Weed Control. 11 February 2014 University of Hertfordshire and 25 February 2014, University of Lancaster.
• Tzilivakis, J., Lewis, K.A., Green, A., Warner, D.J., Stedman, A. & Naseby, D. (2013). Review of substances/agents that have direct beneficial effect on the environment: Mode of action and assessment of efficacy. EFSA Supporting Publication 2013:EN-440. European Food Safety Authority, Parma, Italy.[Download].
• Tzilivakis, J., Lewis, K., Green, A., Warner, D., Fialkiewicz, W., Olearczyk, D., Bordet, C. & Langevin, B. (2013). Optimal Design of Climate Change Policies Through the EU's Rural Development Policy: Final Report to the European Commission. European Commission, Brussels.
• Warner, D.J., Tzilivakis, J., Green, A., Slater, R.I.J. & Lewis, K.A. (2013). Measuring the Extent to Which Greenhouse Gas Emission Savings Achieved by Environmental Stewardship are Displaced On-farm - Natural England Report NECR121. Natural England, York, UK. [Download].
• Lewis, K.A., Green, A., Warner, D.J. & Tzilivakis, J. (2012). Carbon accounting tools: are they fit for purpose in the context of arable cropping. International Journal of Agricultural Sustainability, 11(2): 159-175. DOI.
• Tzilivakis, J., Green, A., Warner, D.J., McGeever,K. & Lewis, K.A. (2012). A framework for practical and effective eco-labelling of food products. Sustainability Accounting, Management and Policy Journal, 3(1): 50-73. DOI. [Outstanding Paper Award Winner at the Literati Network Awards for Excellence 2013]
• Tzilivakis, J., Lewis, K.A., Green, A. & Warner, D.J. (2011). A Novel Technique for Identifying Environmental Outcomes from Agricultural Practices. Impact Assessment and Project Appraisal, 29(1): 2-10. DOI.
• Tzilivakis, J., Lewis, K.A., Green, A., Warner, D.J., MacMillan, T & McGeevor, K. (2011). Effective approaches to environmental labelling of food products. Final Report for Defra Project FO0419. January 2011.
• Tzilivakis, J., Lewis, K.A., Green, A. & Warner, D.J. (2010). The Climate Change Mitigation Potential of an EU Farm: Towards a Farm-Based Integrated Assessment: Final Report for EC Project ENV.B.1/ETU/2009/0052. European Commission, Brussels.
• Warner, D.J., Lewis, K.A., Tzilivakis, J. & Green, A. (2010). Integrated Management Options for Agricultural Climate Change Mitigation (IMPACCT). Proceedings of ‘The Dundee Conference Crop Protection in Northern Britain 2010’, University of Dundee, 23 – 24 February 2010.
• Warner, D.J., Davies, M., Hipps, N., Osborne, N., Tzilivakis, J. & Lewis, K.A. (2010). Greenhouse gas emissions and energy use in UK-grown short-day strawberry (Fragaria xananassa Duch) crops. Journal of Agricultural Science, 148(6): 667-681. DOI.
• Lewis, K.A., Green, A., Tzilivakis, J. & Warner, D.J. (2010). The contribution of UK farm assurance schemes to environmental policy: Research Update Brief. University of Hertfordshire, Hatfield, UK. [Download].
• Lewis, K.A., Green, A., Tzilivakis, J. & Warner, D.J. (2010). The contribution of UK farm assurance schemes towards desirable environmental policy outcomes. International Journal of Agricultural Sustainability, 8(4): 237–249. DOI.
• Warner, D.J., Allen-Williams, L.J., Warrington, S., Ferguson, A.W. & Williams, I.H. (2008). Implications for conservation biocontrol of spatio-temporal relationships between carabid beetles and coleopterous pests in winter oilseed rape. Agricultural and Forest Entomology, 10(4): 375-387.
• Lewis K.A., Tzilivakis J, Green, A., Warner, D.J. & Coles A.J. (2008) Farm Assurance Schemes – Can they improve farming standards? British Food Journal, 110(11): 1088-1105.
• AERU. (2008). Defra project BD2302 Research into the current and potential climate change mitigation impacts of environmental stewardship.Final Report (2008).
• Körner, O., Warner, D., Tzilivakis, J., Eveleens, B. & Heuvelink, E. (2008). Decision Support for Optimising Energy Consumption in European Greenhouses. Acta Hort. (ISHS), 801: 803-810.
• Tzilivakis, J., Jaggard, K., Lewis, K.A., May, M. & Warner, D.J. (2005). An assessment of the energy inputs and greenhouse gas emissions in sugar beet (Beta vulgaris) production in the UK. Agricultural Systems 85, 101-119.
• Tzilivakis, J., Jaggard, K., Lewis, K.A., May, M. & Warner, D.J. (2005). Environmental impact and economic assessment for UK sugar beet production systems. Agriculture, Ecosystems and Environment 107, 341-358.
• AERU. (2005). Defra project HH3606NSF Sustainability of the UK Strawberry Crop. Final Report (2005).
• Ferguson, A.W., Campbell, J.M., Warner, D.J., Watts, N.P., Schmidt, J.E.U. & Williams, I.H. (2004). Phenology and spatial distributions of Dasineura brassicae and its parasitoids in a crop of winter oilseed rape: implications for integrated pest management. IOBC wprs Working Group 'Integrated protection in oilseed crops', 30-31 March 2004, Rothamsted Research, UK.
• Jaggard, K., Tzilivakis, J., Warner, D.J. & Lewis, K.A. (2004). Beet and the environment. British Sugar Beet Review, 72(2), 34-37.
• Warner, D.J., Allen-Williams, L.J., Warrington, S., Ferguson A.W. & Williams, I.H. (2003). Mapping, characterisation, and comparison of the spatio-temporal distributions of cabbage stem flea beetle (Psylliodes chrysocephala), carabids, and Collembola in a crop of winter oilseed rape (Brassica napus). Entomologia Experimentalis et Applicata, 109(3), 225-234.
• Warner, D.J., Tzilivakis, J., Hipps, N., Davies, M., Osborne, N., & Lewis, K.A. (2003). Environmental impact assessment of the UK strawberry crop. Proceedings of the International Fertiliser Society and Dahlia Greidinger Symposium. Izmir, Turkey, 7 – 10 December 2003, pages 396 - 398.
• Green, A., Lewis, K.A., Tzilivakis, J. & Warner, D.J. (2002). Indicators of agricultural sustainability - are they relevant to grassland management? Proceedings of the British Grassland Society Winter Conference - Profitable Grass and Forage: Meeting the needs of the farmer and sosciety. 27-28 November 2002, Stafford, UK. The British Grassland Society, Reading, UK.
• Tzilivakis, J., Jaggard, K., Lewis, K.A., May, M. & Warner, D.J. (2002). Environmental assessment of sugar beet production. Proceedings of the 65th IIRB (International Institute for Beet Research) Congress, Brussels, February 13-14 2002.
• Warner, D.J., Allen-Williams, L.J., Ferguson, A.W. & Williams, I.H. (2000). Pest-predator spatial relationships in winter rape: implications for integrated crop management. Pest Management Science, 56(11), 977-982.

Request copies of papers

To request copies of the above papers please email: d.j.warner@herts.ac.uk.