Pearce, Deborah - Oxford Brookes University - Department of Biological and Medical Sciences

个人简介

I Joined Oxford Brookes in 1996. Prior to this, I was a lecturer in Aberdeen and a NERC Post-Doctoral Research Assistant at the then Queen Mary & Westfield College, London. My recent research focusses on the carbon dynamics of wetlands and their contribution to Global Warming. In my role as Programme Lead for Biology and the Environment I am responsible for the curriculum development of several UG programmes including Environmental Sciences, Animal Biology & Conservation and Biology and PG MSc Conservation Ecology. I am also the Programme Lead for several Collaborative Programmes including the Equine BScs and the FdScs in Equine Science & Management and Animal Behaviour & Welfare, and the Life Sciences Foundation year with Abingdon and Witney College and the FdSc and BSc top-ups in Animal Conservation, Applied Animal Management and Countryside Management with Bridgwater College. I am Recruitment Lead for the Department of Biological & Medical Sciences and member of the Faculty Admissions and Recruitment Group.

研究领域

I study the role of wetlands in carbon cycling. Throughout my work I have developed novel techniques for using quadrupole mass spectrometry with a membrane inlet (QMS) to measure gaseous fluxes from and concentration profiles of dissolved gases in the field (predominantly peatlands but currently also small water bodies) or in collected cores. This technique allows real time in situ measurements at a low spatial resolution of many gases simultaneously (routinely CH4, CO2, O2, N2 and Ar). A clear understanding of carbon and greenhouse gas (GHG) fluxes these systems is of high importance to practitioners and policymakers in order for them to understand the current role of UK peatlands in climate change and improve management of peatlands for climate change mitigation. Currently I am working on the carbon dynamics of small water bodies. They rapidly accumulate sediment, and therefore carbon and there is some evidence that, on a global scale, ponds may be sequestering as much carbon as the world’s oceans. However, the role of ponds in carbon cycling is unclear. The rate at which they return carbon as CO2 and CH4 requires quantification if their role in carbon cycling is to be understood. Ponds may differ in age, depth, temperature, oxygen concentration, nutrient inputs, water quality and litter types. There are therefore a number of factors which can influence decomposition processes and the amount of carbon stored or returned as CO2 or CH4. I am applying expertise gained from working on the carbon dynamics of bogs to small water bodies including the use of quadrupole mass spectrometry in the field to get real time gaseous profiles.

近期论文

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Laing, C.G., Shreeve, T.G. and Pearce, D.M.E. 2010. The fine scale variability of dissolved methane in surface peat cores. Soil Biology & Biochemistry, 42: 1320-1328. Gogo, S., Shreeve, T. G. & Pearce, D. M. E. 2010a. Geochemistry of three contrasting British peatlands: Complex patterns of cation availability and implications for microbial metabolism. Geoderma, 158, 207-215. Gogo, S., Pearce, D.M.E., 2009. Saturation of raised bog peat exchange sites by Pb2+ and Al3+ stimulates CH4 production. Soil Biology and Biochemistry, 41m 2025-2028. doi:10.1016/j.soilbio.2009.07.015. Gogo, S., Pearce, D.M.E., 2009. Carbon, cations and CEC: Interactions and effects on microbial activity in peat. Geoderma, 153m 76-86. doi:10.1016/j.geoderma.2009.07.015. Laing, C.L., Shreeve, T.G. and Pearce, D.M.E. (2008). Methane bubbles in surface peat cores: in situ measurements. Submitted to Global Change Biology, 14 (4): 916-924. Thomas, P.A. and Pearce, D.M.E. (2004). Role of cation exchange in preventing the decay of anoxic deep bog peat. Soil Biology and Biochemistry, 34: 23-32. Gunawardena, A.H.L.A.N., Pearce, D.M., Jackson, M.B., Hawes, C.R. and Evans, D.E. (2001). Characterisation of programmed cell death during aerenchyma formation induced by ethylene or hypoxia in roots of maize (Zea mays L.). Planta, 212: 205-214. Gunawardena, A.H.L.A.N., Pearce, D.M.E., Jackson, M.B., Hawes, C.R. and Evans D.E. (2001). Rapid changes in cell wall pectic polysaccharides are closely associated with early stages of aerenchyma formation, a spatially localised form of programmed cell death in roots of maize (Zea mays L) promoted by ethylene. Plant, Cell and Environment, 24: 1369-1375