School of Environmental Studies
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David's research focused in two areas. His ‘Bioeconomy Systems' research identifies the nature of the large-scale bioeconomy systems that would be needed to address climate change and energy priorities over the next 20 - 40 years, and explores the costs, benefits, opportunities and challenges associated with implementation. The research involves technology and life cycle analysis as well as proposing policy instruments and research priorities. His ‘cropping systems' research is focused on understanding how nitrogen fixing legume crops (eg. soybeans) alter the properties of soil, thereby providing a growth benefit to subsequent crops (crop rotation benefit), enhancing soil carbon pools and stimulating the production of nitrous oxide, a potent greenhouse gas.
Climate change mitigation; bioeconomy systems; bioenergy; biomass; energy policy; renewable energy solutions; sustainable development; carbon and nitrogen cycling; natural resources and environmental policy; plant metabolism; nitrogen fixation; legumes; hydrogen production; crop rotation benefit.
Examples of publications:
Layzell, DB 2006. Global Change and Opportunities: Biosphere Solutions to climate change, energy and the economy. In Fenech, AD, D MacIver, H Auld and T Brydges (eds) The Americas: Building the Adaptive Capacity to Global Environmental Change. Environment Canada Toronto, Ontario, Canada
Layzell, DB and Stephen, J. 2006. Linking Biomass Energy to Biosphere Greenhouse Gas Management. In (J.S. Bhatti, R. Lal, M.J. Apps and M.A. Price, eds) Climate Change and Managed Ecosystems. CRC Press, Pp. 217-232. CRC Press, Boca Raton, FL
Maimaiti J, Zhang Y, Yang J, Cen Y-P, Layzell DB, Peoples M and Dong Z. 2007. Isolation and Characterization of Hydrogen-Oxidizing Bacteria induced following exposure of soil to Hydrogen Gas and their impact on plant growth. Environmental Microbiology9(2): 435-444.
Wei H and Layzell, DB. 2006 Adenylate-coupled ion movement: a mechanism for the control of nodule permeability to O2 diffusion. Plant Physiology 141: 280-287.
Cen, Y-P, DB Layzell. 2004 Does Oxygen limit nitrogenase activity in soybean exposed to elevated CO2? Plant Cell Environment 27:1229-38
Wei, H, Atkins, CA and Layzell, DB 2004b Adenylate Gradients and Ar:O2 effects on legume nodules: 2. Changes in subcellular adenylate pools. Plant Physiology 134: 1775-1783
Wei, H, Atkins, CA and Layzell, DB 2004a. Adenylate Gradients and Ar:O2 effects on legume nodules: 1. Mathematical Models. Plant Physiology 134: 801-812.
Dong, Z, Wu, L, Kettlewell, B, Caldwell, CD and Layzell, DB 2003. Hydrogen fertilization of soils - is this a benefit of legumes in rotation? Plant Cell and Environment 26: 1875-79.
Cen, YP and Layzell, DB. 2003. In vivo Gas exchange measurement of the site and dynamics of nitrate reduction in Soybean. Plant Physiology 131: 1147-56.
Layzell, DB, Z Dong and L Wu. 2005 (Feb 1) Methods for enhancing plant growth using hydrogen gas. US Patent 6,848,212 filed 30 July 1999.
Layzell, D.B., S. Hunt, AN Dowling and RA Young. 2001 (April 24). Differential Gas Analyzer. U.S. Patent 6,220,076 filed 6 May 1999.
Layzell, D.B., Hunt, S., Dowling, A.N., Winship, L.J., Dong, Z. 1999 (Oct 12). Apparatus for rapid measurement of hydrogen concentration and its use in the measurement of nitrogenase activity. US patent 5,965,801. filed July 5, 1996
Layzell, D.B., Hunt, S. Dowling, AN. 1996 (Aug. 6). Method and instrument for measuring differential oxygen concentration between two flowing gas streams. US Patent 5,542,284 filed Oct. 18, 1994.
See also the publications and reports from the BIOCAP Canada Foundation: