Staff Members

| Earth & Ocean Sciences Staff |

Associate Professor Louis Schipper

Role: Associate Professor Qualifications: BSc, MSc, PhD University of Waikato Email: l.schipper@waikato.ac.nz Location: DE.1.01 Contact: +64-7-838 4466 ext. 8531

Research Interests:

• Nitrogen cycling particularly denitrification and it might be manipulated in agricultural environments
• Long term changes in soil organic matter in pastures and nitrogen saturation of organic matter,
• Factors controlling organic matter decomposition including photodegradation
• Utility of Eddy covariance for determining C exchange in different ecosystems
• Soil quality

Selected Publications:

Schipper, L.A.; Dodd, M.; Fisk, L.M.; Power, I.; Parenzee, J.: Arnold G. (accepted) Trends in soil carbon and nutrients of hill-country pastures receiving different phosphorus fertilizer loadings for 20 years. Biogeochemistry. doi 10.1007/s10533-009-9353-5.

Clarkson, B.R.; Schipper, L.A.; W.B. Silvester (2009) Nutritional niche separation in co-existing bog species demonstrated by 15N-enriched simulated rainfall. Austral Ecology, 34: 377-385.

Schipper, L.A.; Roberts A. (2008) Nitrogen transformation in a denitrification layer irrigated with dairy factory effluent. Water Research42:2457–2464.

Parfitt, R.L.; Baisden, W.T.; Schipper, L.A.; Mackay, A.D. (2008) Nitrogen inputs and outputs for New Zealand at national and regional scales: past, present and future. Journal of the Royal Society of New Zealand 38(2): 71–87.

Schipper L.A. (2008) In: Discussion of: Schroder, J.J. Neeteson, J.J. (2008) Nutrient management regulations in The Netherlands (with Discussion), Geoderma. 144: 426-434.

Barkle, G.F.; Schipper, L.A.; Burgess, C.P.; Milne J.; Painter, B.D. (2008) Insitu mixing of organic matter decreases conductivity of denitrification walls in sand aquifers. Groundwater Monitoring Remediation. 28(1): 57-64, doi: 10.1111/j.1745-6592.2007.00185.x

Fritz C.; Campbell D.I.; Schipper L.A. (2008) Oscillating peat surface levels in a restiad peatland, New Zealand-magnitude and spatiotemporal variability. Hydrological Processes. 22, 3264–3274. DOI: 10.1002/hyp.6912

Sparling, G.; Schipper, L.A.; Yeates, G.; Aislabie, J.; Vojvodic-Vukovic, M.; Ryburn, J.; Di H.J. (2008) Soil characteristics, belowground diversity and rates of simazine mineralisation of a New Zealand Gley Soil in a chronosequence under horticultural use. Biology and Fertility of Soils. 44 (4): 633-640

Schipper, L.A.; Baisden, W.T.; Parfitt, R.L.; Ross, C.; Claydon J.J. Arnold, G. (2007) Large losses of soil C and N from soil profiles under pasture in New Zealand during the past 20 years. Global Change Biology.13:1138-1144

Parfitt, R.L; Schipper, L.A.; Baisden, W.T.; Elliot, A.H. (2006) Nitrogen inputs and outputs for New Zealand in 2001 at national and regional scales. Biogeochemistry 80: 71-88.

Sparling, G.P., L. Barton, L. Duncan, A.McGill, T.W. Speir, L. A. Schipper, G. Arnold and A. Van Schaik (2006) Nutrient Leaching and Changes in Soil Characteristics of Four Contrasting Soils Irrigated with Secondary-Treated Wastewater for 4 Years. Australian Journal of Soil Science 44 (2): 107-116.

Sparling G.P.; Wheeler, D.; Vesely E.T.; Schipper L.A. (2006) What is soil organic matter worth? Journal of Environmental Quality 35: 548-557.

Schipper, L.A.; Barkle, G.F.; Vojvodic-Vukovic, M. (2005) Upper limits of nitrate removal in a denitrification wall. Journal of Environmental Quality 34: 1270-1276.

Clarkson, B.R.; Schipper, L.A.; Moyersoen, B.; Silvester, W.B. (2005) Foliar 15N natural abundances indicates phosphorus limitation of bog species. Oecologia 144: 550-557.

Nieveen, J.P.; Campbell, D.I.; Schipper L.A.; Blair, I. (2005) Carbon exchange of grazed pasture on a drained peat soil. Global Change Biology. 11: 607-618.

Schipper, L.A.; Percival, H.J.; Sparling G.P. (2004) An approach for estimating maximum nitrogen storage in soils. Soil Use and Management 20:281-286.

Clarkson, B.R. Schipper L.A., Lehmann, A. (2004) Vegetation and peat characteristics in the development of lowland restiad peat bogs, North Island, New Zealand, since 13,000 14C years BP. Wetlands 24 (1): 133–151.

Sparling G.P.; Schipper, L.A (2004) Soil quality monitoring in New Zealand: trends and issues arising from a broad-scale survey 1995-2001. Agricultural Ecosystems and Environment. 104: 545–552.

Schipper, L.A.; Barkle, G.F.; Vojvodic-Vukovic, M.; Hadfield, J.C.; Burgess, C.P. (2004) Hydraulic constraints on the performance of a groundwater denitrification wall for nitrate removal from shallow groundwater. Journal of Contaminant Hydrology, 69:263–279.

Schipper, L.A; McLeod, M. (2002) Subsidence rates and carbon loss in peat soils following conversion to pasture in the Waikato Region, New Zealand. Soil Use and Management. 18 (2): 91–93.