David R. Lapen, Ph.D.

Image David R. Lapen
Research Scientist: Environmental Change One Health Observatory, Environmental Quality, Hydrology, BMPs, Biodiversity, Landscape Ecology, Soil Health, Climate Change, Environmental Modeling, Ecosystem Services

Research science

Lead: Environmental Change Onehealth Observatory (ECO2)

Current research and/or projects

Environmental Change Onehealth Observatory (ECO2): focus on value, benefits, trade-offs of natural infrastructure/capital in agro-ecosystems from a 'One Health' perspective.  Includes: flood and drought regulation, beneficial insects, wildlife habitat, biodiversity (terrestrial and aquatic), disease regulation (livestock, human, crop), ecosystem service valuation, modeling toolboxes.

 

Research and/or project statements

Publications:

Hussain, I., Phillips, L.A., Hu, Y., Frey, S.K., Geuder, D.S., Edwards, M., Lapen, D.R., Ptacek, C., and Blowes, D.W. Differences in phosphorus biogeochemistry and mediating microorganisms in the matrix and macropores of an agricultural clay loam soil. Soil Biol. Biochem. (2020). Submitted.

Frey, S K; Khader, O; Taylor, A; Erler, A R; Lapen, D R; Sudicky, E A; Berg, S J; Russell, H A J; in, Southern Ontario Groundwater Project 2014-2019; Russell, H A J (ed.); Kjarsgaard, B A (ed.). Geological Survey of Canada, Open File 8536, (2020) p. 231-245

Miltenburg, M.G., Cloutier, M., Craiovan, E., Lapen, D.R., Wilkes, G., Topp, E. and Khan, I.U.. Real-time quantitative PCR assay development and application for assessment of agricultural surface water and various fecal matter for prevalence of Aliarcobacter faecis and Aliarcobacter lanthieri. BMC Microbiology, (2020), 20(1), pp.1-13

Dyck, A., Stacey A. Robinson, Justin B. Renaud, Lyne Sabourin, Mark W. Sumarah, David R. Lapen, Frances R. Pick. Effect of drainage ditch management on the embryonic and tadpole survival, growth, and development of northern leopard frogs (Lithobates pipiens). Archives of Env. Contam. Tox. (2020). In review.

Bennett, Elena, Julia Baird, Helen Baulch, Rebecca, Chaplin-Kramer, Evan Fraser, Phil Loring, Peter Morrison, Lael Parrott, Kate Sherren, Klara J. Winkler, Jerome Cimon-Morin, Marie-Josee Fortin, Barret L. Kurylyk, Jeremy Lundholm, Monique Poulin, Jesse T. Rieb, Andrew Gonzalez, Gordon Hickey, Murray Humphrie, Krishna KC, David R. Lapen. 2020. Ecosystem Services and the Resilience of Agricultural Landscapes. Advances in Ecological Research. (2020). In press.

Noteboom, M., Seidou, O., and Lapen, D.R. Predicting Water Quantity and Quality Trends Resulting from Forest Cover Change in an Agriculturally Dominated River Basin in Eastern Canada. Environmental and Sustainability Indicators, (2020). Revisions.

Buxton, Rachel; Joseph R Bennett; Andrea J Reid; Charles M Schulman; Steven J Cooke; Charles M Francis; Elizabeth A Nyboer; Gary Pritchard; Allison D Binley; Stephanie Avery-Gomm; Natalie C Ban; Karen F Beazley; Elena Bennett; Louise K Blight; Lauren E Bortolotti; Alaine F Camfield; Zuzu Gadallah; Aerin L Jacob; Illona Naujokaitis-lewis; Ciara Raudsepp-Hearne; Dominique G Roche; François Soulard; Diana Stralberg; Kella D Sadler; Kevin A Solarik; Carly D Ziter; James Brandt; Christopher W McKindsey; David A Greenwood; Peter C Boxall; Cyprian F Ngolah; Kai M.A. Chan; David Lapen; Scott Poser; Judith Girard; Claudio DiBacco; Shari Hayne; Diane Orihel; Doug W Lewis; Danika Littlechild; Shawn J Marshall; Larry McDermott; Rod Whitlow; David Browne; Jennifer Sunday; Paul A Smith.  Key information needs to move from knowledge to action for biodiversity conservation in Canada. Biological Conservation, (2020). In review.

Wilson, A., Wilson, S., and Lapen, D.R. Human footprint influences the global prevalence of a generalist parasite in mammalian wildlife. Proceedings Royal Society B. (2020). Revisions.

S.K. Frey, K. Miller, O. Khader, A. Taylor, D. Morrison, E.A. Sudicky, S.J. Berg, D.R. Lapen. 2020.  A Fully-Integrated Groundwater-Surface Water Model to Estimate Flood and Drought Regulation Services Associated with Agricultural Land Management. J. of Environmental Management, (2020) Revisions.

Wilson, A.G., Lapen, D.R., Mitchell, G.W., Provencher, J.F. and Wilson, S., 2020. Interaction of diet and habitat predicts Toxoplasma gondii infection rates in wild birds at a global scale. Global Ecology and Biogeography, (2020) 29(7), pp.1189-1198.

Kross, A., Znoj, E., Callegari, D., Kaur, G., Sunohara, M., Lapen, D.R. and McNairn, H.. Using Artificial Neural Networks and Remotely Sensed Data to Evaluate the Relative Importance of Variables for Prediction of Within-Field Corn and Soybean Yields. Remote Sensing, (2020) 12(14), p.2230.

Khan, I; Becker, A; Cloutier, M; Plötz, M; Lapen, D; Wilkes, G; Topp, E; Abdulmawjood, A. Loop-mediated Isothermal Amplification: development, validation and application of simple and rapid assays for quantitative detection of Arcobacteraceae family- and species Aliacrobacter faecis and Aliarcobacter lanthieri. J. Applied Microbiology, (2020). In press

Mechai, S., Bilodeau, G., Lung, O., Roy, M., Steeves, R., Gagne, N., Baird, D., Lapen, D.R., Ludwig, A., Ogden, N.H. Mosquito identification from bulk samples using DNA metabarcoding: a protocol to support mosquito-borne disease surveillance in Canada. J. Medical Entomology. (2020). In review.

Blume, O., Guitard, E., Amos, R., Clark, I., Sunohara, M., Blowes, D., Ptacek, C., Craiovan, E., Lapen, D.R. 2020. 14C is an Indicator of CO2 Transport in Cultivated and Non-Cultivated Soil Environments. Geoderma, (2020). Revisions

Edge, T.A., Baird, D.J., Bilodeau, G., Gagné, N., Greer, C., Konkin, D., Newton, G., Séguin, A., Beaudette, L., Bilkhu, S., Bush, A., Chen, W., Comte, J., Condie, J., Crevecoeur, S., El-Kayssi, N., Emilson, E.J.S., Fancy, D.-L., Kandalaft, I., Khan, I.U.H., King, I., Kreutzweiser, D., Lapen, D., Lawrence, J., Lowe, C., Lung, O., Martineau, C., Meier, M., Ogden, N., Paré, D., Phillips, L., Porter, T.M., Sachs, J., Staley, Z., Steeves, R., Venier, L., Veres, T., Watson, C., Watson, S., Macklin, J.The Ecobiomics project: Advancing metagenomics assessment of soil health and freshwater quality in Canada. Sci. Total. Environ. (2020) 710, art. no. 135906.

Zhang, H., Chen, W., Zhao, B., Phillips, L.A., Zhou, Y., Lapen, D.R., Liu, J. Sandy soils amended with bentonite induced changes in soil microbiota and fungistasis in maize fields. App. Soil  Ecol. (2020) 146, art. no. 103378.

Zolfaghari, K., Wilkes, G., Bird, S., Ellis, D., Pintar, K.D.M., Gottschall, N., McNairn, H., Lapen, D.R.Chlorophyll-a, dissolved organic carbon, turbidity and other variables of ecological importance in river basins in southern Ontario and British Columbia, Canada. Environ. Mon. Assess. (2020) 192 (1), art. no. 67.

Frey, S K; Khader, O; Taylor, A; Erler, A R; Lapen, D R; Sudicky, E A; Berg, S J; Russell, H A J. A fully integrated groundwater-surface-water model for southern Ontario: proof-of-concept and data release.  Geological Survey of Canada, Open File 8639, (2019), 23 pages

Erler, A.R., Frey, S.K., Khader, O., d'Orgeville, M., Park, Y.-J., Hwang, H.-T., Lapen, D.R., Peltier, W.R., Sudicky, E.A.Evaluating Climate Change Impacts on Soil Moisture and Groundwater Resources Within a Lake-Affected Region. Water Resour. Res. (2019) 55 (10), pp. 8142-8163

Bracewell, S., Verdonschot, R.C.M., Schäfer, R.B., Bush, A., Lapen, D.R., Van den Brink, P.J.Qualifying the effects of single and multiple stressors on the food web structure of Dutch drainage ditches using a literature review and conceptual models. Sci. Total. Environ. (2019) 684, pp. 727-740.

Van den Brink, P.J., Bracewell, S.A., Bush, A., Chariton, A., Choung, C.B., Compson, Z.G., Dafforn, K.A., Korbel, K., Lapen, D.R., Mayer-Pinto, M., Monk, W.A., O'Brien, A.L., Rideout, N.K., Schäfer, R.B., Sumon, K.A., Verdonschot, R.C.M., Baird, D.J. Towards a general framework for the assessment of interactive effects of multiple stressors on aquatic ecosystems: Results from the Making Aquatic Ecosystems Great Again (MAEGA) workshop. Sci. Total. Environ. (2019) 684, pp. 722-726.

Hwang, H.-T., Park, Y.-J., Frey, S.K., Callaghan, M.V., Berg, S.J., Lapen, D.R., Sudicky, E.A. Efficient numerical incorporation of water management operations in integrated hydrosystem models: Application to tile drainage and reservoir operating systems. J. Hydrol. (2019) 575, pp. 1253-1266.

Lapen, D.R. Using quantitative microbial risk assessment to explore waterborne pathogen infection risks associated with interventions of agricultural management practices. International Journal of Infectious Diseases, (2019), 79, p.73.

Xu, X., Frey, S.K., Boluwade, A., Erler, A.R., Khader, O., Lapen, D.R., Sudicky, E. Evaluation of variability among different precipitation products in the Northern Great Plains. J. Hydrol. (2019) 24, art. no. 100608.

Hwang, H.-T., Frey, S.K., Park, Y.-J., Pintar, K.D.M., Lapen, D.R., Thomas, J.L., Spoelstra, J., Schiff, S.L., Brown, S.J., Sudicky, E.A. Estimating cumulative wastewater treatment plant discharge influences on acesulfame and Escherichia coli in a highly impacted watershed with a fully-integrated modelling approach. Water Res. (2019) 157, pp. 647-662.

Wilkes, G., Sunohara, M.D., Topp, E., Gottschall, N., Craiovan, E., Frey, S.K., Lapen, D.R. Do reductions in agricultural field drainage during the growing season impact bacterial densities and loads in small tile-fed watersheds? Water Res. (2019) 151, pp. 423-438.

Zambri, M., Cloutier, M., Adam, Z., Lapen, D.R., Wilkes, G., Sunohara, M., Topp, E., Talbot, G., Khan, I.U.H. Novel virulence, antibiotic resistance and toxin gene-specific PCR-based assays for rapid pathogenicity assessment of Arcobacter faecis and Arcobacter lanthieri. BMC Microbiol. (2019) 19 (1), art. no. 11.

Chantigny, M.H., Bittman, S., Larney, F.J., Lapen, D., Hunt, D.E., Goyer, C., Angers, D.A. A multi-region study reveals high overwinter loss of fall-applied reactive nitrogen in cold and frozen soils. Can. J. Soil Sci. (2019) 99 (2), pp. 126-135.

Erler, A.R., Frey, S.K., Khader, O., d'Orgeville, M., Park, Y.-J., Hwang, H.-T., Lapen, D.R., Richard Peltier, W., Sudicky, E.A. Simulating Climate Change Impacts on Surface Water Resources Within a Lake-Affected Region Using Regional Climate Projections. Wat. Resour. Res. (2019) 55 (1), pp. 130-155.

Hussain, S.I., Frey, S.K., Blowes, D.W., Ptacek, C.J., Wilson, D., Mayer, K.U., Su, D., Gottschall, N., Edwards, M., Lapen, D.R. Reactive transport of manure-derived nitrogen in the vadose zone: Consideration of macropore connectivity to subsurface receptors. Vadose Zone J. (2019) 18 (1), pp. 2-18.

Morrison, L.M., Renaud, J.B., Sabourin, L., Sumarah, M.W., Yeung, K.K.C., Lapen, D.R. High-throughput quantitation of neonicotinoids in lyophilized surface water by LC-APCI-MS/MS. J. AOAC Int. (2018) 101 (6), pp. 1940-1947.

Kross, A., Znoj, E., Callegari, D., Kaur, G., Sunohara, M., van Vliet, L., Rudy, H., Lapen, D. and McNairn, H. Evaluation of an artificial neural network approach for prediction of corn and soybean yield. In Proceedings of the 14th International Conference on Precision Agriculture, (2018), 24-27.

He, W., Yang, J.Y., Qian, B., Drury, C.F., Hoogenboom, G., He, P., Lapen, D., Zhou, W. Climate change impacts on crop yield, soil water balance and nitrate leaching in the semiarid and humid regions of Canada. PLoS ONE. (2018) 13 (11), art. no. e0207370.

Liu, L., Cloutier, M., Craiovan, E., Edwards, M., Frey, S.K., Gottschall, N., Lapen, D.R., Sunohara, M., Topp, E., Khan, I.U.H. Quantitative real-time PCR-based assessment of tile drainage management influences on bacterial pathogens in tile drainage and groundwater. Sci. Total. Environ. (2018) 624, pp. 1586-1597.

Chen, W., Wilkes, G., Khan, I.U.H., Pintar, K.D.M., Thomas, J.L., Lévesque, C.A., Chapados, J.T., Topp, E., Lapen, D.R. Aquatic bacterial communities associated with land use and environmental factors in agricultural landscapes using a metabarcoding approach. Frontiers Microbiol. (2018) 9, art. no. 2301.

Lapen, D.R., Topp, E., Gottschall, N. and Edwards, M., 2018. Land application of municipal biosolids: managing the fate and transport of contaminants of emerging concern. Detritus, 1(1), p.122.

Le Riche, E.L., VanderZaag, A.C., Burtt, S., Lapen, D.R., Gordon, R. Water use and conservation on a free-stall dairy farm. Water (Switz.). (2017) 9 (12), art. no. 977

Khan, I.U.H., Cloutier, M., Libby, M., Lapen, D.R., Wilkes, G., Topp, E. Enhanced Single-tube Multiplex PCR Assay for Detection and Identification of Six Arcobacter Species. J. App. Microbiol. (2017) 123 (6), pp. 1522-1532.

Van Zandvoort, A., Lapen, D.R., Clark, I.D., Flemming, C., Craiovan, E., Sunohara, M.D., Boutz, R., Gottschall, N. Soil CO2, CH4, and N2O fluxes over and between tile drains on corn, soybean, and forage fields under tile drainage management. Nutrient Cycle. Agroecosys. (2017) 109 (2), pp. 115-132.

Van Zandvoort, A., Clark, I.D., Flemming, C., Craiovan, E., Sunohara, M.D., Gottschall, N., Boutz, R., Lapen, D.R. Using 13C isotopic analysis to assess soil carbon pools associated with tile drainage management during drier and wetter growing seasons. Agric. Water. Manage. (2017) 192, pp. 232-243.

Lau, C.H.-F., Li, B., Zhang, T., Tien, Y.-C., Scott, A., Murray, R., Sabourin, L., Lapen, D.R., Duenk, P., Topp, E. Impact of pre-application treatment on municipal sludge composition, soil dynamics of antibiotic resistance genes, and abundance of antibiotic-resistance genes on vegetables at harvest. Sci. Total. Environ. (2017) 587-588, pp. 214-222.

Coyotzi, S., Doxey, A.C., Clark, I.D., Lapen, D.R., Van Cappellen, P., Neufeld, J.D. Agricultural soil denitrifiers possess extensive nitrite reductase gene diversity. Environ. Microbiol. (2017) 19 (3), pp. 1189-1208.

Jones, T.H., Brassard, J., Topp, E., Wilkes, G., Lapen, D.R. Waterborne viruses and F-specific coliphages in mixed-use watersheds: Microbial associations, host specificities, and affinities with environmental/land use factors. App. Environ. Microbiol. (2017) 83 (3), art. no. e02763-16.

Gottschall, N., Topp, E., Edwards, M., Payne, M., Kleywegt, S., Lapen, D.R. Brominated flame retardants and perfluoroalkyl acids in groundwater, tile drainage, soil, and crop grain following a high application of municipal biosolids to a field. Sci. Total. Environ. (2017) 574, pp. 1345-1359.

Sunohara, M.D., Gottschall, N., Craiovan, E., Wilkes, G., Topp, E., Frey, S.K., Lapen, D.R. Controlling tile drainage during the growing season in Eastern Canada to reduce nitrogen, phosphorus, and bacteria loading to surface water.  Agric. Water. Manage. (2016) 178, pp. 159-170.

Fernando, D.M., Khan, I.U., Patidar, R., Lapen, D.R., Talbot, G., Topp, E., Kumar, A. Isolation and characterization of acinetobacter baumannii recovered from campylobacter selective medium. Frontiers Microbiol. (2016) 7 (NOV), art. no. 1871.

Lapen, D.R., Schmidt, P.J., Thomas, J.L., Edge, T.A., Flemming, C., Keithlin, J., Neumann, N., Pollari, F., Ruecker, N., Simhon, A., Topp, E., Wilkes, G., Pintar, K.D.M. Towards a more accurate quantitative assessment of seasonal Cryptosporidium infection risks in surface waters using species and genotype information. Water Res. (2016) 105, pp. 625-637.

Gottschall, N., Edwards, M., Craiovan, E., Frey, S.K., Sunohara, M., Ball, B., Zoski, E., Topp, E., Khan, I., Clark, I.D., Lapen, D.R. Amending woodchip bioreactors with water treatment plant residuals to treat nitrogen, phosphorus, and veterinary antibiotic compounds in tile drainage. Ecol. Engineer. (2016) 95, pp. 852-864.

Coors, A., Edwards, M., Lorenz, P., Römbke, J., Schmelz, R., Topp, E., Waszak, K., Wilkes, G., Lapen, D.R. Biosolids applied to agricultural land: Influence on structural and functional endpoints of soil fauna on a short- and long-term scale. Sci. Total. Environ. (2016) 562, pp. 312-326.

Laprade, N., Cloutier, M., Lapen, D.R., Topp, E., Wilkes, G., Villemur, R., Khan, I.U.H. Detection of virulence, antibiotic resistance and toxin (VAT) genes in Campylobacter species using newly developed multiplex PCR assays. J.  Microbiol. Methods. (2016) 124, pp. 41-47.

Frey, S.K., Hwang, H.-T., Park, Y.-J., Hussain, S.I., Gottschall, N., Edwards, M., Lapen, D.R. Dual permeability modeling of tile drain management influences on hydrologic and nutrient transport characteristics in macroporous soil. J. Hydrol. (2016) 535, pp. 392-406.

Rahube, T.O., Marti, R., Scott, A., Tien, Y.-C., Murray, R., Sabourin, L., Duenk, P., Lapen, D.R., Topp, E. Persistence of antibiotic resistance and plasmid-associated genes in soil following application of sewage sludge and abundance on vegetables at harvest. Can. J. Microbiol. (2016) 62 (7), pp. 600-607.

Whiteduck-Léveillée, K., Whiteduck-Léveillée, J., Cloutier, M., Tambong, J.T., Xu, R., Topp, E., Arts, M.T., Chao, J., Adam, Z., Lévesque, C.A., Lapen, D.R., Villemur, R., Khan, I.U.H. Identification, characterization and description of Arcobacter faecis sp. nov., isolated from a human waste septic tank. Syst. Appl. Microbiol. (2016) 39 (2), pp. 93-99.

Dring, C., Devlin, J.F., Boag, G., Sunohara, M.D., Fitzgibbon, J., Topp, E., Lapen, D.R. Incentives and disincentives identified by producers and drainage contractors/experts on the adoption of controlled tile drainage in eastern Ontario, Canada. Wat. Qual. Res. J. Can. (2016) 51 (1), pp. 1-16.

Whiteduck-Léveillée, J., Cloutier, M., Topp, E., Lapen, D.R., Talbot, G., Villemur, R., Khan, I.U.H. Development and evaluation of multiplex PCR assays for rapid detection of virulence-associated genes in Arcobacter species. J. Microbiol. Methods. (2016) 121, pp. 59-65.

Frey, S.K., Topp, E., Khan, I.U.H., Ball, B.R., Edwards, M., Gottschall, N., Sunohara, M., Lapen, D.R. Quantitative Campylobacter spp., antibiotic resistance genes, and veterinary antibiotics in surface and ground water following manure application: Influence of tile drainage control. Sci. Total. Environ. (2015) 532, pp. 138-153.

Kross, A., Lapen, D.R., McNairn, H., Sunohara, M., Champagne, C., Wilkes, G. Satellite and in situ derived corn and soybean biomass and leaf area index: Response to controlled tile drainage under varying weather conditions. Agric. Wat. Manage. (2015) 160, pp. 118-131.

Jokinen, C.C., Koot, J., Cole, L., Desruisseau, A., Edge, T.A., Khan, I.U.H., Koning, W., Lapen, D.R., Pintar, K.D.M., Reid-Smith, R., Thomas, J.L., Topp, E., Wang, L.Y., Wilkes, G., Ziebell, K., van Bochove, E., Gannon, V.P.J. The distribution of Salmonella enterica serovars and subtypes insurface water from five agricultural regions across Canada. Water Res. (2015) 76, pp. 120-131.

Al-Rajab, A.J., Sabourin, L., Lapen, D.R., Topp, E. Dissipation of triclosan, triclocarban, carbamazepine and naproxen in agricultural soil following surface or sub-surface application of dewatered municipal biosolids. Sci. Total. Environ. (2015) 512-513, pp. 480-488.

El-Khoury, A., Seidou, O., Lapen, D.R.L., Que, Z., Mohammadian, M., Sunohara, M., Bahram, D. Combined impacts of future climate and land use changes on discharge, nitrogen and phosphorus loads for a Canadian river basin. J. Environ. Manage. (2015) 151, pp. 76-86.

Kross, A., McNairn, H., Lapen, D., Sunohara, M., Champagne, C. Assessment of RapidEye vegetation indices for estimation of leaf area index and biomass in corn and soybean crops. Int. J. App. Earth Observ. Geoinform. (2015) 34 (1), pp. 235-248.

Que, Z., Seidou, O., Droste, R.L., Wilkes, G., Sunohara, M., Topp, E., Lapen, D.R. Using AnnAGNPS to predict the effects of tile drainage control on nutrient and sediment loads for a river basin. J. Environ. Qual. (2015) 44 (2), pp. 629-641.

Sunohara, M.D., Gottschall, N., Wilkes, G., Craiovan, E., Topp E., Que, Z., Seidou, O., Frey, S.K., Lapen, D.R. Long-term observations of nitrogen and phosphorus export in paired-agricultural watersheds under controlled and conventional tile drainage. J. Environ. Qual. (2015) 44 (5), pp. 1589-1604.

Frey, S.K., Gottschall, N., Wilkes, G., Grégoire, D.S., Topp, E., Pintar, K.D.M., Sunohara, M., Marti, R., Lapen, D.R. Rainfall-induced runoff from exposed streambed sediments: An important source of water pollution. J. Environ. Qual. (2015) 44 (1), pp. 236-247.

Whiteduck-Léveillée, K., Whiteduck-Léveillée, J., Cloutier, M., Tambong, J.T., Xu, R., Topp, E., Arts, M.T., Chao, J., Adam, Z., Lévesque, C.A., Lapen, D.R., Villemur, R., Talbot, G., Khan, I.U.H. Arcobacter lanthieri sp. Nov., isolated from pig and dairy cattle manure. Int.  J. Syst. Evolution. Micro. (2015) 65 (8), pp. 2709-2716.

Khan, I.U.H., Gannon, V., Jokinen, C.C., Kent, R., Koning, W., Lapen, D.R., Medeiros, D., Miller, J., Neumann, N.F., Phillips, R., Schreier, H., Topp, E., van Bochove, E., Wilkes, G., Edge, T.A. A national investigation of the prevalence and diversity of thermophilic Campylobacter species in agricultural watersheds in Canada. Water Res. (2014) 61, pp. 243-252.

Macherius, A., Lapen, D.R., Reemtsma, T., Römbke, J., Topp, E., Coors, A. Triclocarban, triclosan and its transformation product methyl triclosan in native earthworm species four years after a commercial-scale biosolids application. Sci. Total. Environ. (2014) 472, pp. 235-238.

Gregorich, E.G., McLaughlin, N.B., Lapen, D.R., Ma, B.L., Rochette, P. Soil compaction, both an environmental and agronomic culprit: Increased nitrous oxide emissions and reduced plant nitrogen uptake. Soil Sci. Soc. Am. J. (2014) 78 (6), pp. 1913-1923.  

McNairn, H., Kross, A., Lapen, D., Caves, R., Shang, J. Early season monitoring of corn and soybeans with TerraSAR-X and RADARSAT-2. Int. J. Appl. Earth Observ. Geoinfo. (2014) 28 (1), pp. 252-259.

Sunohara, M.D., Craiovan, E., Topp, E., Gottschall, N., Drury, C.F., Lapen, D.R. Comprehensive nitrogen budgets for controlled tile drainage fields in eastern Ontario, Canada. J. Environ. Qual. (2014) 43 (2), pp. 617-630.

El-Khoury, A., Seidou, O., Lapen, D.R., Sunohara, M., Zhenyang, Q., Mohammadian, M., Daneshfar, B. Prediction of land-use conversions for use in watershed-scale hydrological modeling: A Canadian case study. Can. Geographer. (2014) 58 (4), pp. 499-516.

Rahube, T.O., Marti, R., Scott, A., Tien, Y.-C., Murray, R., Sabourin, L., Zhang, Y., Duenk, P., Lapen, D.R., Topp, E. Impact of fertilizing with raw or anaerobically digested sewage sludge on the abundance of antibiotic-resistant coliforms, antibiotic resistance genes, and pathogenic bacteria in soil and on vegetables at harvest. App. Environ. Microbiol. (2014) 80 (22), pp. 6898-6907.

Adam, Z., Whiteduck-Leveillee, K., Cloutier, M., Tambong, J.T., Chen, W., Lewis, C.T., Lévesque, C.A., Topp, E., Lapen, D.R., Talbot, G., Khan, I.U.H. Draft genome sequences of three Arcobacter strains of pig and dairy cattle manure origin. Genome Announce. (2014) 2 (3), art. no. e00377-14

Adam, Z., Whiteduck-Leveillee, K., Cloutier, M., Chen, W., Lewis, C.T., Lévesque, C.A., Topp, E., Lapen, D.R., Tambong, J.T., Talbot, G., Khan, I.U.H. Draft genome sequence of Arcobacter cibarius strain LMG21996T, isolated from broiler carcasses. Genome Announce. (2014) 2 (1), art. no. e00034-14.

Adam, Z., Whiteduck-Léveillée, K., Cloutier, M., Chen, W., Lewis, C.T., Lévesque, C.A., Topp, E., Lapen, D.R., Tambong, J.T., Talbot, G., Khan, I.U.H. Draft genome sequences of two Arcobacter strains isolated from human feces. Genome Announce. (2014) 2 (2), art. no. e00113-14

Wilkes, G., Brassard, J., Edge, T.A., Gannon, V., Gottschall, N., Jokinen, C.C., Jones, T.H., Khan, I.U.H., Marti, R., Sunohara, M.D., Topp, E., Lapen, D.R. Long-term monitoring of waterborne pathogens and microbial source tracking markers in paired agricultural watersheds under controlled and conventional tile drainage management. App. Environ. Microbiol. (2014) 80 (12), pp. 3708-3720.

Nangia, V., Sunohara, M.D., Topp, E., Gregorich, E.G., Drury, C.F., Gottschall, N., Lapen, D.R. Measuring and modeling the effects of drainage water management on soil greenhouse gas fluxes from corn and soybean fields. J. Environ. Manage. (2013) 129, pp. 652-664.

Marti, R., Zhang, Y., Tien, Y.-C., Lapen, D.R., Topp, E. Assessment of a new Bacteroidales marker targeting North American beaver (Castor canadensis) fecal pollution by real-time PCR. J. Micro. Methods. (2013) 95 (2), pp. 201-206.

Zoski, E.D., Lapen, D.R., Gottschall, N., Murrell, R.S., Schuba, B. Nitrogen, phosphorus, and bacteria removal in laboratory-scale woodchip bioreactors amended with drinking water treatment residuals. Trans. ASABE. (2013) 56 (4), pp. 1339-1347.

Frey, S.K., Topp, E., Edge, T., Fall, C., Gannon, V., Jokinen, C., Marti, R., Neumann, N., Ruecker, N., Wilkes, G., Lapen, D.R. Using SWAT, Bacteroidales microbial source tracking markers, and fecal indicator bacteria to predict waterborne pathogen occurrence in an agricultural watershed. Water Res. (2013) 47 (16), pp. 6326-6337.

Wilkes, G., Brassard, J., Edge, T.A., Gannon, V., Jokinen, C.C., Jones, T.H., Neumann, N., Pintar, K.D.M., Ruecker, N., Schmidt, P.J., Sunohara, M., Topp, E., Lapen, D.R. Bacteria, viruses, and parasites in an intermittent stream protected from and exposed to pasturing cattle: Prevalence, densities, and quantitative microbial risk assessment. Water  Res. (2013) 47 (16), pp. 6244-6257.

Wilkes, G., Brassard, J., Edge, T.A., Gannon, V., Jokinen, C.C., Jones, T.H., Marti, R., Neumann, N.F., Ruecker, N.J., Sunohara, M., Topp, E., Lapen, D.R. Coherence among different microbial source tracking markers in a small agricultural stream with or without livestock exclusion practices. App. Environ. Microbiol. (2013) 79 (20), pp. 6207-6219.

Parmley, E.J., Pintar, K., Majowicz, S., Avery, B., Cook, A., Jokinen, C., Gannon, V., Lapen, D.R., Topp, E., Edge, T.A., Gilmour, M., Pollari, F., Reid-Smith, R., Irwin, R. A Canadian application of one health: Integration of salmonella data from various Canadian surveillance programs (2005-2010).  Foodborne Path. Disease. (2013) 10 (9), pp. 747-756.

Schmidt, P.J., Pintar, K.D.M., Fazil, A.M., Flemming, C.A., Lanthier, M., Laprade, N., Sunohara, M.D., Simhon, A., Thomas, J.L., Topp, E., Wilkes, G., Lapen, D.R. Using Campylobacter spp. and Escherichia coli data and Bayesian microbial risk assessment to examine public health risks in agricultural watersheds under tile drainage management. Water  Res. (2013) 47 (10), pp. 3255-3272.

Frey, S.K., Topp, E., Ball, B.R., Edwards, M., Gottschall, N., Sunohara, M., Zoski, E., Lapen, D.R. Tile drainage management influences on surface-water and groundwater quality following liquid manure Application. J. Environ. Qual. (2013) 42 (3), pp. 881-892.

Marti, R., Gannon, V.P.J., Jokinen, C., Lanthier, M., Lapen, D.R., Neumann, N.F., Ruecker, N.J., Scott, A., Wilkes, G., Zhang, Y., Topp, E. Quantitative multi-year elucidation of fecal sources of waterborne pathogen contamination in the South Nation River basin using Bacteroidales microbial source tracking markers. Water. Res. (2013) 47 (7), pp. 2315-2324.

Ruecker, N.J., Matsune, J.C., Lapen, D.R., Topp, E., Edge, T.A., Neumann, N.F. The detection of Cryptosporidium and the resolution of mixtures of species and genotypes from water. Infection, Genetics, Evolution. (2013) 15, pp. 3-9.

Gottschall, N., Topp, E., Edwards, M., Payne, M., Kleywegt, S., Russell, P., Lapen, D.R. Hormones, sterols, and fecal indicator bacteria in groundwater, soil, and subsurface drainage following a high single application of municipal biosolids to a field. Chemosphere. (2013) 91 (3), pp. 275-286.

Wilkes, G., Ruecker, N.J., Neumann, N.F., Gannon, V.P.J., Jokinen, C., Sunohara, M., Topp, E., Pintar, K.D.M., Edge, T.A., Lapen, D.R. Spatiotemporal analysis of Cryptosporidium species/genotypes and relationships with other zoonotic pathogens in surface water from mixed-use watersheds. App. Environ. Microbiol. (2013) 79 (2), pp. 434-448.

Lyautey, E., Hartmann, A., Lapen, D.R., Topp, E. A comparison of enrichment and direct-plating methods for isolation of Listeria monocytogenes from surface water. Can. J. Micro. (2012) 58 (12), pp. 1405-1410.

Ruecker, N.J., Matsune, J.C., Wilkes, G., Lapen, D.R., Topp, E., Edge, T.A., Sensen, C.W., Xiao, L., Neumann, N.F. Molecular and phylogenetic approaches for assessing sources of Cryptosporidium contamination in water. Water Res. (2012) 46 (16), pp. 5135-5150.

Sabourin, L., Duenk, P., Bonte-Gelok, S., Payne, M., Lapen, D.R., Topp, E. Uptake of pharmaceuticals, hormones and parabens into vegetables grown in soil fertilized with municipal biosolids. Sci. Total. Environ. (2012) 431, pp. 233-236.

Sunohara, M.D., Topp, E., Wilkes, G., Gottschall, N., Neumann, N., Ruecker, N., Jones, T.H., Edge, T.A., Marti, R., Lapen, D.R. Impact of riparian zone protection from cattle on nutrient, bacteria, f-coliphage, cryptosporidium, and giardia loading of an intermittent stream. J. Environ. Qual. (2012) 41 (4), pp. 1301-1314.

Crabbé, P., Lapen, D.R., Clark, H., Sunohara, M., Liu, Y. Economic benefits of controlled tile drainage: Watershed Evaluation of Beneficial Management Practices, South Nation River basin, Ontario. Wat. Qual. Res. J. Can. (2012) 47 (1), pp. 30-41.

Frey, S.K., Rudolph, D.L., Lapen, D.R., Ball Coelho, B.R. Viscosity dependent dual-permeability modeling of liquid manure movement in layered, macroporous, tile drained soil. Wat. Resour. Res. (2012) 48 (3), art. no. W00L11

Gottschall, N., Topp, E., Metcalfe, C., Edwards, M., Payne, M., Kleywegt, S., Russell, P., Lapen, D.R. Pharmaceutical and personal care products in groundwater, subsurface drainage, soil, and wheat grain, following a high single application of municipal biosolids to a field. Chemosphere. (2012) 87 (2), pp. 194-203.

Ball Coelho, B., Murray, R., Lapen, D., Topp, E., Bruin, A. Phosphorus and sediment loading to surface waters from liquid swine manure application under different drainage and tillage practices. Agric. Wat. Manage. (2012) 104, pp. 51-61.

Ball Coelho, B., Lapen, D., Murray, R., Topp, E., Bruin, A., Khan, B. Nitrogen loading to offsite waters from liquid swine manure application under different drainage and tillage practices. Agric. Wat. Manage. (2012) 104, pp. 40-50.

Jokinen, C.C., Edge, T.A., Koning, W., Laing, C.R., Lapen, D.R., Miller, J., Mutschall, S., Scott, A., Taboada, E.N., Thomas, J.E., Topp, E., Wilkes, G., Gannon, V.P.J. Spatial and temporal drivers of zoonotic pathogen contamination of an agricultural watershed. J. Environ. Qual. (2012) 41 (1), pp. 242-252.

Edge, T.A., El-Shaarawi, A., Gannon, V., Jokinen, C., Kent, R., Khan, I.U.H., Koning, W., Lapen, D., Miller, J., Neumann, N., Phillips, R., Robertson, W., Schreier, H., Scott, A., Shtepani, I., Topp, E., Wilkes, G., van Bochove, E. Investigation of an Escherichia coli environmental benchmark for waterborne pathogens in agricultural watersheds in Canada. J. Environ. Qual. (2012) 41 (1), pp. 21-30.

Que, Z., Seidou, O., Lapen, D.R., Droste, R.L. Climate change impacts on the effectiveness of controlled tile drainage in the south nation river watershed, Ontario, Canada. J. Environ. Qual. (2011) 1, pp. 617-625.

Ruecker, N., Matsune, J., Lapen, D., Schrier, H., Van Bochove, E., Koning, W., Edge, T., Topp, E., Sensen, C., Xiao, L., Neumann, N. Phylogenetic processes for analyzing the sequence diversity of Cryptosporidium from environmental samples used for source tracking. Water Quality Technology Conference and Exposition 2011. (2011) pp. 2106-2117.

Wilkes, G., Edge, T.A., Gannon, V.P.J., Jokinen, C., Lyautey, E., Neumann, N.F., Ruecker, N., Scott, A., Sunohara, M., Topp, E., Lapen, D.R. Associations among pathogenic bacteria, parasites, and environmental and land use factors in multiple mixed-use watersheds. Water. Res. (2011) 45 (18), pp. 5807-5825.

Marti, R., Zhang, Y., Lapen, D.R., Topp, E. Development and validation of a microbial source tracking marker for the detection of fecal pollution by muskrats. J. Micro. Methods. (2011) 87 (1), pp. 82-88.

Gregorich, E.G., Lapen, D.R., Ma, B.L., McLaughlin, N.B., Vanden Bygaart, A.J. Soil and crop response to varying levels of compaction, nitrogen fertilization, and clay content. Soil. Sci. Soc. Am. J. (2011) 75 (4), pp. 1483-1492.

Sabourin, L., Al-Rajab, A.J., Chapman, R., Lapen, D.R., Topp, E. Fate of the antifungal drug clotrimazole in agricultural soil. Environ. Tox. Chem. (2011) 30 (3), pp. 582-587.

Edwards, M., Topp, E., Bolton, P., Lapen, D.R. Practical considerations optically sensing rhodamine WT in water impacted by municipal biosolids. Environ. Mon. Assess. (2011) 173 (1-4), pp. 37-44.

Lanthier, M., Scott, A., Zhang, Y., Cloutier, M., Durie, D., Henderson, V.C., Wilkes, G., Lapen, D.R., Topp, E. Distribution of selected virulence genes and antibiotic resistance in Enterococcus species isolated from the South Nation River drainage basin, Ontario, Canada. J. App. Micro. (2011) 110 (2), pp. 407-421.

Lyautey, E., Wilkes, G., Miller, J.J., Van Bochove, E., Schreier, H., Koning, W., Edge, T.A., Lapen, D.R., Topp, E. Variation of an indicator of Escherichia coli persistence from surface waters of mixed-use watersheds, and relationship with environmental factors. Annal. de Limnol. (2011) 47 (1), pp. 11-19.

Cicek, H., Sunohara, M., Wilkes, G., McNairn, H., Pick, F., Topp, E., Lapen, D.R. Using vegetation indices from satellite remote sensing to assess corn and soybean response to controlled tile drainage. Agric. Wat. Manage. (2010) 98 (2), pp. 261-270.

Sunohara, M., Youssef, M.A., Topp, E., Lapen, D.R. Measured effect of agricultural drainage water management on hydrology, water quality, and crop yield. ASABE - 9th International Drainage Symposium 2010, Held Jointly with CIGR and CSBE/SCGAB. (2010) pp. 392-401.

Al-Rajab, A.J., Sabourin, L., Lapen, D.R., Topp, E. The non-steroidal anti-inflammatory drug diclofenac is readily biodegradable in agricultural soils. Sci. Total. Environ. (2010) 409 (1), pp. 78-82.

Ruecker, N.J., Wilkes, G., Lapen, D.R., Topp, E., Edge, T.A., Neumann, N.F. Investigating the association between land use and cryptosporidium occurrence in the south nation watershed in eastern Ontario, Canada. 2010 International Symposium on Waterborne Pathogens. (2010) 21 p.

Topp, E., Metcalfe, C.D., Boxall, A.B., Lapen, D.R. Transport of PPCPs and veterinary medicines from agricultural fields following application of biosolids or manure. ACS Symposium Series, (2010) 1048, pp. 227-240.

Lanthier, M., Scott, A., Lapen, D.R., Zhang, Y., Topp, E. Frequency of virulence genes and antibiotic resistances in Enterococcus spp. isolates from wastewater and feces of domesticated mammals and birds, and wildlife. Can. J. Micro. (2010) 56 (9), pp. 715-729.

Al-Rajab, A.J., Sabourin, L., Chapman, R., Lapen, D.R., Topp, E. Fate of the antiretroviral drug tenofovir in agricultural soil. Sci. Total. Environ. (2010) 408 (22), pp. 5559-5564.

Küster, A., Alder, A.C., Escher, B.I., Duis, K., Fenner, K., Garric, J., Hutchinson, T.H., Lapen, D.R., Péry, A., Römbke, J., Snape, J., Ternes, T., Topp, E., Wehrhan, A., Knackerk, T. Environmental risk assessment of human pharmaceuticals in the European union: A case study with the β-blocker atenolol. Integrated Environ. Assess. Manage. (2010) 6 (SUPPL. 1), pp. 514-523.

Lyautey, E., Lu, Z., Lapen, D.R., Wilkes, G., Scott, A., Berkers, T., Edge, T.A., Topp, E. Distribution and diversity of escherichia coli populations in the South Nation River Drainage basin, eastern Ontario Canada. App. Environ. Micro. (2010) 76 (5), pp. 1486-1496.

Gottschall, N., Topp, E., Edwards, M., Russell, P., Payne, M., Kleywegt, S., Curnoe, W., Lapen, D.R. Polybrominated diphenyl ethers, perfluorinated alkylated substances, and metals in tile drainage and groundwater following applications of municipal biosolids to agricultural fields. Sci. Tot. Environ.(2010) 408 (4), pp. 873-883.

Lyautey, E., Lu, Z., Lapen, D.R., Berkers, T.E., Edge, T.A., Topp, E. Optimization and validation of rep-PCR genotypic libraries for microbial source tracking of environmental Escherichia coli isolates. Can. J. Micro. (2010) 56 (1), pp. 8-17.

Gottschall, N., Edwards, M., Topp, E., Bolton, P., Payne, M., Curnoe, W.E., Ball Coelho, B., Lapen, D.R. Nitrogen, phosphorus, and bacteria tile and groundwater quality following direct injection of dewatered municipal biosolids into soil. J. Environ. Qual., (2009) 38, pp. 1066-1075

McLaughlin, N.B., Burtt, S.D., Lapen, D.R. Comparison of directional semi-variograms for mouldboard plough and field cultivator draught. Precision Agriculture 2009 - Papers Presented at the 7th European Conference on Precision Agriculture, ECPA 2009. (2009) pp. 453-459.

Shtepani, I., Edge, T.A., Valeo, C., Khan, I.U.H., Gannon, V., Kent, R., Koning, W., Lapen, D.R., Medeiros, D., Miller, J., Phillips, R., Topp, E., Van Bochove, E., Ruecker, N., Neumann, N.F. Source water protection: How well do traditional water quality indicators correlate with pathogen occurrence? Water Quality Technology Conference and Exposition 2009. (2009) pp. 3710-3720.

Khan, I.U.H., Gannon, V., Loughborough, A., Jokinen, C., Kent, R., Koning, W., Lapen, D.R., Medeiros, D., Miller, J., Neumann, N., Phillips, R., Robertson, W., Schreier, H., Topp, E., van Bochove, E., Edge, T.A. A methods comparison for the isolation and detection of thermophilic Campylobacter in agricultural watersheds. J. Micro. Methods. (2009) 79 (3), pp. 307-313.

Al-Rajab, A.J., Sabourin, L., Scott, A., Lapen, D.R., Topp, E. Impact of biosolids on the persistence and dissipation pathways of triclosan and triclocarban in an agricultural soil. Sci. Total Environ. (2009) 407 (23), pp. 5978-5985.

Topp, E., Scott, A., Lapen, D.R., Lyautey, E., Duriez, P. Livestock waste treatment systems for reducing environmental exposure to hazardous enteric pathogens: Some considerations. Biores. Technol. (2009) 100 (22), pp. 5395-5398.

Sabourin, L., Beck, A., Duenk, P.W., Kleywegt, S., Lapen, D.R., Li, H., Metcalfe, C.D., Payne, M., Topp, E. Runoff of pharmaceuticals and personal care products following application of dewatered municipal biosolids to an agricultural field. Sci. Total. Environ. (2009) 407 (16), pp. 4596-4604.

Gottschall, N., Edwards, M., Topp, E., Bolton, P., Payne, M., Kleywegt, S., Curnoe, W.E., Ball Coelho, B., Lapen, D.R. Nitrogen, phosphorus, and bacteria tile and ground water quality following direct injection of dewatered municipal biosolids into soil. J. Environ Qual. (2009) 38, pp. 1066-1075

Edwards, M., Topp, E., Metcalfe, C.D., Li, H., Gottschall, N., Bolton, P., Curnoe, W., Payne, M., Beck, A., Kleywegt, S., Lapen, D.R. Pharmaceutical and personal care products in tile drainage following surface spreading and injection of dewatered municipal biosolids to an agricultural field. Sci. Total. Environ. (2009) 407 (14), pp. 4220-4230.

Larsbo, M., Lapen, D.R., Topp, E., Metcalfe, C., Abbaspour, K.C., Fenner, K. Simulation of pharmaceutical and personal care product transport to tile drains after biosolids application. J. Environ. Qual. (2009) 38 (3), pp. 1274-1285.

Gottschall, N., Edwards, M., Topp, E., Bolton, P., Payne, M., Curnoe, W.E., Ball Coelho, B., Lapen, D.R. Nitrogen, phosphorus, and bacteria tile and groundwater quality following direct injection of dewatered municipal biosolids into soil. J. Environ. Qual. (2009) 38 (3), pp. 1066-1075.

Wilkes, G., Edge, T., Gannon, V., Jokinen, C., Lyautey, E., Medeiros, D., Neumann, N., Ruecker, N., Topp, E., Lapen, D.R. Seasonal relationships among indicator bacteria, pathogenic bacteria, Cryptosporidium oocysts, Giardia cysts, and hydrological indices for surface waters within an agricultural landscape. Water Res. (2009) 43 (8), pp. 2209-2223.

Ruecker, N.J., Wilkes, G., Topp, E., Edge, T.A., Lapen, D.R., Neumann, N.F. Identifying mechanisms associated with spatial and temporal variation in Cryptosporidium occurrence in the South Nation River basin. Water Quality Technology Conference and Exposition 2008. (2008) pp. 3724-3733.

Topp, E., Hendel, J.G., Lapen, D.R., Chapman, R. Fate of the nonsteroidal anti-inflammatory drug naproxen in agricultural soil receiving liquid municipal biosolids. Envion. Tox. Chem. (2008) 27 (10), pp. 2005-2010.

Lapen, D.R., Topp, E., Metcalfe, C.D., Li, H., Edwards, M., Gottschall, N., Bolton, P., Curnoe, W., Payne, M., Beck, A. Pharmaceutical and personal care products in tile drainage following land application of municipal biosolids. Sci. Tot. Environ. (2008) 399 (1-3), pp. 50-65.

Akhand, N., Lapen, D.R., Topp, E., Edwards, M.J., Sabourin, L., Ball Coelho, B.R., Duenk, P.W., Payne, M., Gottschall, N. Using MACRO to simulate liquid sewage biosolid transport to tile drains for several land application methods. Trans. ASABE. (2008) 51 (4), pp. 1235-1245.

Topp, E., Monteiro, S.C., Beck, A., Coelho, B.B., Boxall, A.B.A., Duenk, P.W., Kleywegt, S., Lapen, D.R., Payne, M., Sabourin, L., Li, H., Metcalfe, C.D. Runoff of pharmaceuticals and personal care products following application of biosolids to an agricultural field. Sci. Tot. Environ. (2008) 396 (1), pp. 52-59.

Ouellet, G., Lapen, D.R., Topp, E., Sawada, M., Edwards, M. A heuristic model to predict earthworm biomass in agroecosystems based on selected management and soil properties. App. Soil Ecol. (2008) 39 (1), pp. 35-45.

Lapen, D.R., Topp, E., Edwards, M., Sabourin, L., Curnoe, W., Gottschall, N., Bolton, P., Rahman, S., Ball-Coelho, B., Payne, M., Kleywegt, S., McLaughlin, N. Effect of liquid municipal biosolid application method on tile and ground water quality. J. Environ. Qual. (2008) 37 (3), pp. 925-936.

McLaughlin, N.B., Lapen, D.R. Anisotropy in spatial measurements of mouldboard plough draught. Precision Agriculture 2007 - Papers Presented at the 6th European Conference on Precision Agriculture, ECPA 2007 (2007) pp. 103-108.

Ruecker, N.J., Topp, E., Edge, T.A., Lapen, D.R., Van Bochove, E., Schreier, H., Koning, W., Miller, J., Kha, I.U.H., Gannon, V., Sensen, C.W., Neumann, N.F. Molecular forensic profiling of cryptosporidium spp to determine the diversity of fecal contamination in four Canadian watersheds. American Water Works Association - Water Quality Technology Conference and Exposition 2007: Fast Tracks to Water Quality (2007) pp. 2536-2547.

Turpin, K.M., Lapen, D.R., Topp, E., Robin, M.J.L., Edwards, M., Curnoe, W.E., Ball Coelho, B., McLaughlin, N.B., Payne, M. Tine-influenced infiltration patterns and informing timing of liquid amendment applications using brilliant blue dye tracers. Biosys. Engineer. (2007) 98 (2), pp. 235-247.

Lyautey, E., Hartmann, A., Pagotto, F., Tyler, K., Lapen, D.R., Wilkes, G., Piveteau, P., Rieu, A., Robertson, W.J., Medeiros, D.T., Edge, T.A., Gannon, V., Topp, E. Characteristics and frequency of detection of fecal Listeria monocytogenes shed by livestock, wildlife, and humans. Can J. Microbiol. (2007) 53 (10), pp. 1158-1167.

Turpin, K.M., Lapen, D.R., Robin, M.J.L., Topp, E., Edwards, M., Curnoe, W.E., Topp, G.C., McLaughlin, N.B., Coelho, B.B., Payne, M. Slurry-application implement tine modification of soil hydraulic properties under different soil water content conditions for silt-clay loam soils. Soil Till. Res. (2007) 95 (1-2), pp. 120-132.

Lyautey, E., Lapen, D.R., Wilkes, G., McCleary, K., Pagotto, F., Tyler, K., Hartmann, A., Piveteau, P., Rieu, A., Robertson, W.J., Medeiros, D.T., Edge, T.A., Gannon, V., Topp, E. Distribution and characteristics of Listeria monocytogenes isolates from surface waters of the South Nation River watershed, Ontario, Canada. App. Environ. Microbiol. (2007) 73 (17), pp. 5401-5410.

Ruecker, N.J., Braithwaite, S.L., Topp, E., Edge, T., Lapen, D.R., Wilkes, G., Robertson, W., Medeiros, D., Sensen, C.W., Neumann, N.F. Tracking host sources of Cryptosporidium spp. in raw water for improved health risk assessment. App. Environ. Microbiol. (2007) 73 (12), pp. 3945-3957.

Khan, I.U.H., Gannon, V., Kent, R., Koning, W., Lapen, D.R., Miller, J., Neumann, N., Phillips, R., Robertson, W., Topp, E., van Bochove, E., Edge, T.A. Development of a rapid quantitative PCR assay for direct detection and quantification of culturable and non-culturable Escherichia coli from agriculture watersheds. J. Microbiol. Methods (2007) 69 (3), pp. 480-488.

Ball Coelho, B.R., Roy, R.C., Topp, E., Lapen, D.R. Tile water quality following liquid swine manure application into standing corn. J. Environ. Qual. (2007) 36 (2), pp. 580-587.

McLaughlin, N.B., Li, Y.X., Bittman, S., Lapen, D.R., Burtt, S.D., Patterson, B.S.  Draft requirements for contrasting liquid manure injection equipment. Can.  Biosys. Engineer. (2006) 48, pp. 2.29-2.37.

Akhand, N.A., Lapen, D.R., Topp, E., Edwards, M.J., Sabourin, L., Coelho, B.R.B., Duenk, P.W., Payne, M. Prediction of liquid municipal biosolid and precipitation induced tile flow in a Southern Ontario agricultural field using MACRO. Agric. Wat. Manage. (2006) 83 (1-2), pp. 37-50.

Akhand, N.A., Lapen, D.R., Edwards, M.J., Topp, E., Sabourin, L., Ball Coelho, B.R., Duenk, P.W., Payne, M. Tile water bacteria and modeling macropore flow in silt-loam structured field soils. 2005 ASAE Annual International Meeting (2005) 9 p.

Lu, Z., Lapen, D., Scott, A., Dang, A., Topp, E. Identifying host sources of fecal pollution: Diversity of Escherichia coli in confined dairy and swine production systems. App. Environ. Microbiol. (2005) 71 (10), pp. 5992-5998.

Lapen, D.R., Price, J.S., Gilbert, R. Modelling two-dimensional steady-state groundwater flow and flow sensitivity to boundary conditions in blanket peat complexes. Hydrol. Processes. (2005) 19 (2), pp. 371-386.

Turpin, K.M., Lapen, D.R., Gregorich, E.G., Topp, G.C., Edwards, M., McLaughlin, N.B., Curnoe, W.E., Robin, M.J.L. Using multivariate adaptive regression splines (MARS) to identify relationships between soil and corn (Zea mays L.) production properties. Can. J. Soil Sci. (2005) 85 (5), pp. 625-636.

Akhand, N.A., Lapen, D.R., Topp, E., Edwards, M.J., Roy, R.C., Coelho, B.R.B., Sabourin, L., Duenk, P.W., Payne, M. Modeling preferential flow and risk of biosolid contamination to tile drains using a dual porosity model. ASAE Annual International Meeting 2004. (2004) pp. 3053-3062.

Lapen, D.R., Topp, G.C., Bugden, J., and Pattey, E. A New TDR Probe for Evaluating Airborne SAR Data for Soil Water Content Estimates. 2004 CIGR International Conference- Beijing. (2004).

Lapen, D.R., Topp, G.C., Edwards, M.E., Gregorich, E.G., Curnoe, W.E. Combination cone penetration resistance/water content instrumentation to evaluate cone penetration-water content relationships in tillage research. Soil Till. Res. (2004) 79 (1), pp. 51-62.

Lapen, D.R., Topp, G.C., Gregorich, E.G., Curnoe, W.E. Least limiting water range indicators of soil quality and corn production, eastern Ontario, Canada. Soil Till Res. (2004) 78 (2), pp. 151-170.

Hayhoe, H.N., Lapen, D.R., Andrews, C.J. Using weather indices to predict survival of winter wheat in a cool temperate environment. (2003) Int. J. Biomet. 47 (2), pp. 62-72.

Lapen, D.R., Hayhoe, H.N. Spatial Analysis of Seasonal and Annual Temperature and Precipitation Normals in Southern Ontario, Canada. J. Great Lakes Res. (2003) 29 (4), pp. 529-544.

Topp, G.C., Lapen, D.R., Edwards, M.J., Young, G.D. Laboratory calibration, in-field validation and use of a soil penetrometer measuring cone resistance and water content. Vadose Zone J. (2003) 2 (4), pp. 633-641.

Hayhoe, H.N., Lapen, D.R., Mclaughlin, N.B., Curnoe, W.E. Measurements of mouldboard plow draft: I. Spectrum analysis and filtering. Precision Agric. (2002) 3 (3), pp. 225-236.

Lapen, D.R., Hayhoe, H.N., Topp, G.C., McLaughlin, N.B., Gregorich, E.G., Curnoe, W.E. Measurements of mouldboard plow draft: II. Draft-soil-crop and yield-draft associations. Precision Agric. (2002) 3 (3), pp. 237-257.

Lapen, D.R., Mclaughlin, N.B., Gregorich, E.G., Hayhoe, H.N. and Curnoe, W.E., 2002. On using multiple approaches to assess tillage and trafficking effects on crop yields. In 17. World congress of soil science, Bangkok (Thailand), (2002).

Lapen, D.R., Topp, G.C., Gregorich, E.G., Hayhoe, H.N., Curnoe, W.E. Divisive field-scale associations between corn yields, management, and soil information. Soil Till. Res. (2001) 58 (3-4), pp. 193-206.

Hayhoe, H.N. and Lapen, D.R. Spatially modelling temperature normals in the Rocky Mountains with kriging and cokriging estimators using ANN produced secondary information. In Proceedings II Conference of Artificial Intelligence, AMS, Annual Meeting, (2001).

Lapen, D.R., Topp, G.C., Hayhoe, H.N., Gregorich, E.G., Curnoe, W.E. Stochastic simulation of soil strength/compaction and assessment of corn yield risk using threshold probability patterns. Geoderma. (2001) 104 (3-4), pp. 325-343.

Hayhoe, H.N., McLaughlin, N.B., Topp, G.C., Lapen, D.R. and Curnoe, W.E., 2000. Spectral analysis and filtering of measurements of mouldboard plow draft. In Proceedings of the 5th International Conference on Precision Agriculture, (2000), 1-14

McLaughlin, N.B., Lapen, D.R., Topp, G.C., Hayhoe, H.N. and Gregorich, E.G.. Spatial associations between mouldboard plow draft, management practice, and corn grain yield. In Proceedings of the 3rd European Conference on Precision Agriculture (2001), 437-442.

Lapen, D.R., Price, J.S., Gilbert, R. Soil water storage dynamics in peatlands with shallow water tables. Can J. Soil Sci.. (2000) 80 (1), pp. 43-52.

Lapen, D.R., Wang, C. Placic and ortstein horizon genesis and peatland development, southeastern Newfoundland. Soil Sci. Soc. Am. J. (1999) 63 (5), pp. 1472-1482.

Lapen, D.R., Martz, L.W. An investigation of the spatial association between snow depth and topography in a Prairie agricultural landscape using digital terrain analysis. J. Hydrol. (1996) 184 (3-4), pp. 277-298.

Lapen, D.R., Moorman, B.J., Price, J.S. Using ground-penetrating radar to delineate subsurface features along a wetland catena. Soil Sci. Soc. Am.  J. (1996) 60 (3), pp. 923-931.

Lapen, D.R., Martz, L.W. The measurement of two simple topographic indices of wind sheltering-exposure from raster digital elevation models. Computers and Geosci. (1993) 19 (6), pp. 769-779.

Book Chapters

Topp, G.C., and Lapen, D.R. 2006. Field soil strength. In: Soil Sampling and Methods and Analysis, M. Carter and D. Anger (eds.), Lewis Pub. 783-801.

McLaughlin, N.B., Lapen, D.R., Kroetsch, D., Wang, X., Gregorich, E.G., Ma, B.L. and Li, Y.X. 2004. Soil compaction and corn roots. In Advance silage corn management. S. Bittman and C.G. Kowalenko (Eds.) Pacific Field Corn Association. Agassiz, BC. ISBN: 0-9685015-1-6, 82-84.

Deen, B., Janovicek, K., Vyn, T., and Lapen, D.R. 2006. Effect of intermittent tillage on yield and soil quality in a corn/soybean/wheat rotation. In: Soil Management for Sustainability: Advances in GeoEcology 38, R. Horn, H. Fleige, S. Peth and X. Peng (eds.) Catena Verlag GMBH, Reiskirchen, German. 189-194.

Metcalfe, C.D., Alder, A.C., Halling-Sørensen, B., Krogh, K., Fenner, K., Larsbo, M., Straub, J.O., Ternes, T.A., Topp, E., Lapen, D.R., and Boxall, A.B.A. (2008). "Exposure assessment methods for veterinary and human use medicines in the environment: PEC vs MEC comparisons.", in Kümmerer, K.(ed.) - Pharmaceuticals in the Environment: Sources, Fate, Effects and Risks. 3rd Edition, Springer Berlin / Heidelberg, pp. 147-171

Topp, E., Metcalfe, C.D., Boxall, A.B.A., and Lapen, D.R. (2010). "Transport of PPCPs and Veterinary Medicines from Agricultural Fields following Application of Biosolids or Manure." in Halden, R.U. (ed.)- Contaminants of Emerging Concern in the Environment: Ecological and Human Health Considerations. ACS Symposium Series Vol. 1048, American Chemical Society (ACS), Chapter 10, pp. 227-240.

Parrott, J., McLaughlin, A., Lapen, D.R., and Topp, E. (2010). "Environmental risk assessment of pharmaceuticals.", in Kaputska, L.A. and Landis, W.G. (eds.) - Environmental Risk Assessment and Management from a Landscape Perspective, John Wiley & Sons, Ltd, pp. 329-346

 

Education and awards

B.A.: Central Washington Univ. (1988)

M.Sc.: Univ. Saskatchewan (1991)

Ph.D.:  Queen's Univ. (Kingston) (1998)

Key publications

  1. He, W., Yang, J.Y., Qian, B., Drury, C.F., Hoogenboom, G., He, P., Lapen, D., Zhou, W. (2018). Climate change impacts on crop yield, soil water balance and nitrate leaching in the semiarid and humid regions of Canada, 13(11), http://dx.doi.org/10.1371/journal.pone.0207370

    2018 - View publication details

  2. Liu, L., Cloutier, M., Craiovan, E., Edwards, M., Frey, S.K., Gottschall, N., Lapen, D.R., Sunohara, M., Topp, E., Khan, I.U.H. (2018). Quantitative real-time PCR-based assessment of tile drainage management influences on bacterial pathogens in tile drainage and groundwater, 624 1586-1597. http://dx.doi.org/10.1016/j.scitotenv.2017.10.200

    2018 - View publication details

  3. Jones, T.H., Brassard, J., Topp, E., Wilkes, G., Lapen, D.R. (2017). Waterborne viruses and F-specific coliphages in mixed-use watersheds: Microbial associations, host specificities, and affinities with environmental/land use factors, 83(3), http://dx.doi.org/10.1128/AEM.02763-16

    2017 - View publication details

  4. Fernando, D.M., Khan, I.U.H., Patidar, R., Lapen, D.R., Talbot, G., Topp, E., Kumar, A. (2016). Isolation and characterization of acinetobacter baumannii recovered from campylobacter selective medium, 7(NOV), http://dx.doi.org/10.3389/fmicb.2016.01871

    2016 - View publication details

  5. Coors, A., Edwards, M., Lorenz, P., Römbke, J., Schmelz, R.M., Topp, E., Waszak, K., Wilkes, G., Lapen, D.R. (2016). Biosolids applied to agricultural land: Influence on structural and functional endpoints of soil fauna on a short- and long-term scale, 562 312-326. http://dx.doi.org/10.1016/j.scitotenv.2016.03.226

    2016 - View publication details

  6. Laprade, N., Cloutier, M., Lapen, D.R., Topp, E., Wilkes, G., Villemur, R., Khan, I.U.H. (2016). Detection of virulence, antibiotic resistance and toxin (VAT) genes in Campylobacter species using newly developed multiplex PCR assays, 124 41-47. http://dx.doi.org/10.1016/j.mimet.2016.03.009

    2016 - View publication details

  7. Rahube, T.O., Marti, R., Scott, A., Tien, Y.C., Murray, R., Sabourin, L., Duenk, P., Lapen, D.R., Topp, E. (2016). Persistence of antibiotic resistance and plasmid-associated genes in soil following application of sewage sludge and abundance on vegetables at harvest, 62(7), 600-607. http://dx.doi.org/10.1139/cjm-2016-0034

    2016 - View publication details

  8. Whiteduck-Léveillée, K., Whiteduck-Léveillée, J., Cloutier, M., Tambong, J.T., Xu, R., Topp, E., Arts, M.T., Chao, J., Adam, Z., Lévesque, C.A., Lapen, D.R., Villemur, R., Khan, I.U.H. (2016). Identification, characterization and description of Arcobacter faecis sp. nov., isolated from a human waste septic tank, 39(2), 93-99. http://dx.doi.org/10.1016/j.syapm.2015.12.002

    2016 - View publication details

  9. Dring, C., Devlin, J.F., Boag, G., Sunohara, M.D., Fitzgibbon, J., Topp, E., Lapen, D.R. (2016). Incentives and disincentives identified by producers and drainage contractors/experts on the adoption of controlled tile drainage in eastern Ontario, Canada, 51(1), 1-16. http://dx.doi.org/10.2166/wqrjc.2015.047

    2016 - View publication details

  10. Whiteduck-Léveillée, J., Cloutier, M., Topp, E., Lapen, D.R., Talbot, G., Villemur, R., Khan, I.U.H. (2016). Development and evaluation of multiplex PCR assays for rapid detection of virulence-associated genes in Arcobacter species, 121 59-65. http://dx.doi.org/10.1016/j.mimet.2015.12.017

    2016 - View publication details

  11. Kross, A., Lapen, D.R., McNairn, H., Sunohara, M., Champagne, C., Wilkes, G. (2015). Satellite and in situ derived corn and soybean biomass and leaf area index: Response to controlled tile drainage under varying weather conditions, 160 118-131. http://dx.doi.org/10.1016/j.agwat.2015.06.007

    2015 - View publication details

  12. Jokinen, C.C., Koot, J., Cole, L., Desruisseau, A., Edge, T.A., Khan, I.U.H., Koning, W., Lapen, D.R., Pintar, K.D.M., Reid-Smith, R., Thomas, J.L., Topp, E., Wang, L.Y., Wilkes, G., Ziebell, K., van Bochove, E., Gannon, V.P.J. (2015). The distribution of Salmonella enterica serovars and subtypes insurface water from five agricultural regions across Canada, 76 120-131. http://dx.doi.org/10.1016/j.watres.2015.02.038

    2015 - View publication details

  13. Al-Rajab, A.J., Sabourin, L., Lapen, D.R., Topp, E. (2015). Dissipation of triclosan, triclocarban, carbamazepine and naproxen in agricultural soil following surface or sub-surface application of dewatered municipal biosolids, 512-513 480-488. http://dx.doi.org/10.1016/j.scitotenv.2015.01.075

    2015 - View publication details

  14. Frey, S.K., Gottschall, N., Wilkes, G., Grégoire, D.S., Topp, E., Pintar, K.D.M., Sunohara, M., Marti, R., Lapen, D.R. (2015). Rainfall-induced runoff from exposed streambed sediments: An important source of water pollution, 44(1), 236-247. http://dx.doi.org/10.2134/jeq2014.03.0122

    2015 - View publication details

  15. Whiteduck-Léveillée, K., Whiteduck-Léveillée, J., Cloutier, M., Tambong, J.T., Xu, R., Topp, E., Arts, M.T., Chao, J., Adam, Z., Lévesque, C.A., Lapen, D.R., Villemur, R., Talbot, G., Khan, I.U.H. (2015). Arcobacter lanthieri sp. Nov., isolated from pig and dairy cattle manure, 65(8), 2709-2716. http://dx.doi.org/10.1099/ijs.0.000318

    2015 - View publication details

  16. Kross, A., McNairn, H., Lapen, D., Sunohara, M., Champagne, C. (2015). Assessment of RapidEye vegetation indices for estimation of leaf area index and biomass in corn and soybean crops, 34(1), 235-248. http://dx.doi.org/10.1016/j.jag.2014.08.002

    2015 - View publication details

  17. Que, Z., Seidou, O., Droste, R.L., Wilkes, G., Sunohara, M., Topp, E., Lapen, D.R. (2015). Using AnnAGNPS to predict the effects of tile drainage control on nutrient and sediment loads for a river basin, 44(2), 629-641. http://dx.doi.org/10.2134/jeq2014.06.0246

    2015 - View publication details

  18. Khan, I.U.H., Gannon, V., Jokinen, C.C., Kent, R., Koning, W., Lapen, D.R., Medeiros, D., Miller, J., Neumann, N.F., Phillips, R., Schreier, H., Topp, E., van Bochove, E., Wilkes, G., Edge, T.A. (2014). A national investigation of the prevalence and diversity of thermophilic Campylobacter species in agricultural watersheds in Canada, 61 243-252. http://dx.doi.org/10.1016/j.watres.2014.05.027

    2014 - View publication details

  19. Macherius, A., Lapen, D.R., Reemtsma, T., Römbke, J., Topp, E., Coors, A. (2014). Triclocarban, triclosan and its transformation product methyl triclosan in native earthworm species four years after a commercial-scale biosolids application, 472 235-238. http://dx.doi.org/10.1016/j.scitotenv.2013.10.113

    2014 - View publication details

  20. Wilkes, G., Brassard, J., Edge, T.A., Gannon, V., Gottschall, N., Jokinen, C.C., Jones, T.H., Khan, I.U.H., Marti, R., Sunohara, M.D., Topp, E., Lapen, D.R. (2014). Long-term monitoring of waterborne pathogens and microbial source tracking markers in paired agricultural watersheds under controlled and conventional tile drainage management, 80(12), 3708-3720. http://dx.doi.org/10.1128/AEM.00254-14

    2014 - View publication details