Merrin Macrae

Merrin Macrae is a Professor in the Department of Geography and Environmental Management at the University of Waterloo. She specializes in hydrological controls on biogeochemical processes. Her research interests center around nutrient (nitrogen, phosphorus) and sediment dynamics and water quality in agricultural landscapes and wetlands. Dr. Macrae studies water quality at both watershed and field scales, with an emphasis on understanding the impacts of assisted or modified land drainage. Her work also emphasizes processes occurring in winter and during snowmelt, characterizing the efficacy of conservation practices during these critical times. Her research is largely field-based science, focused on Southern Ontario and Manitoba, Canada.

• water quality

• biogeochemical processes

• nutrients

• eutrophication

• agriculture

• wetlands

• climate change

• hydrology

• drainage

My research is at the interface of hydrology and biogeochemistry (hydrobiogeochemistry). The long-term objective of my research program is to improve understanding of interactions between nutrient supply, transformations and transport, and how these may be affected by hydroclimatic variability and landscape change, disturbance or management. My research output has been used by researchers to better understand spatiotemporal variability in hydrochemical processes, and by industry and decision-makers in the recommendation and application of land management practices. My work is largely in agricultural landscapes and is centred around 3 key areas:

• Effects of hydroclimatic and landscape drivers on biogeochemical processes in agricultural systems

• Determination of linkages between hydrologic flowpaths and nutrient mobilization in agricultural systems

• Improved understanding of mechanisms driving the efficacy of management practices in reducing phosphorus mobilization in agricultural systems

My research is largely in agricultural systems, working at the small watershed or edge-of-field scale. I work in both the Great Lakes Region and in the Northern Great Plains. My work evaluates linkages between physical hydrology and nutrient transport (primarily phosphorus). In my research, I look at how factors such as climate and weather variability impact the quantity and flow paths of runoff (especially in tile-drained systems), and how this impacts nutrient losses. In my lab, we examine these processes year-round, but focus on the non-growing season because this is the period during which most nutrients are lost annually, and we know the least about these times. I use my process-based understanding of nutrient transport and work directly with stakeholders to design and implement improved, targeted conservation practices to reduce nutrient losses.

• 2003, Doctorate, Geography & Environmental Studies, Wilfrid Laurier University, Canada

• 1998, Master of Science, Geography, York University, Canada

• 1996, Bachelor of Environmental Studies, Environmental Studies, York University, Canada

• • Best Paper Award

• Canadian Journal of Plant Science, 2026

• • Outstanding Research Award

• Faculty of Environment, University of Waterloo, 2024

• • Outstanding Reviewer Award

• Journal of Environmental Quality, 2023

• • Best Paper Award

• Journal of Environmental Quality, 2022

• • Best Paper Award

• Vadose Zone Journal, 2021

• • Outstanding Performance Award (3)

• Faculty of Environment, University of Waterloo ($5000), 2016, 2020, 2024

• • D.L. Gray Award for Best Student Paper in Hydrology

• Canadian Geophysical Union ($500), 2003

• Administration

• • Associate Chair for Undergraduate Studies, Dept. of Geography and Environmental Management, University of Waterloo, 2015-2018.

• Committees

• University

• • Waterloo Awards Committee, 2020-2024

• • Designated Chairs’ Pool for PhD Examinations, 2019-2022, 2026-present

• • University Committee on Student Appeals (Member), Environmental Studies, University of Waterloo, 2007-2014.

• • University of Waterloo President’s Committee for Northern Research, Northern Scientific Training Program (Chair), 2011-2014.

• • The Water Institute Seminar Series (Co-organizer), University of Waterloo, 2010-2013.

• • The Water Institute Strategic Planning Committee (Faculty of Environment Representative), University of Waterloo, 2012-present.

• Faculty

• • Faculty Tenure and Promotion Committee, 2020-2022, 2024-2025

• • Environment Research Council, 2025-present

• • Huntsville Committee, Faculty of Environment, University of Waterloo, 2011-2014.

• • Committee to Review Financial Requests, Faculty of Environment, University of Waterloo, 2008-2014.

• • Ontario Graduate Scholarship Panelist, Faculty of Environment, University of Waterloo, 2008-2009.

• Department/School

• • GEM Tenure and Promotion Committee, 2023-2024

• • GEM Graduate Program Curriculum Review committee, 2023-2024

• • GEM Annual Performance Review evaluation committee, 2018-2022

• • Committee for Review of Undergraduate Curriculum (Earth Systems Node Leader together with C. Fletcher), 2013.

• • Member of Department Advisory Council on Appointments (DACA), 2009-2010.

• • Committee for Review of Undergraduate Curriculum (Earth Systems Node Leader), 2007-2008.

• Editorial Duties:

• • Associate Editor, Canadian Water Resources Journal (April 1, 2017 – present)

• • Associate Editor, Journal of Environmental Quality (Jan 1, 2017 – 2024)

• • Associate Editor, Agricultural Environmental Letters (2015 – 2018; 2024-present)

• • Science Communications Editor, Journal of Environmental Quality (March 2020 – present)

• Scientific Societies:

• • Chair, Southern Extension and Research Activity (SERA-17) Innovative Solutions to Minimize Phosphorus Losses from Agriculture, (Chair 2021-2023). (Chair-Elect 2020, Past-Chair 2024-2026)

• • Lake Simcoe Science Steering Committee (member), 2017-2020.

• • Canadian Geophysical Union (Biogeosciences Section) Executive Board (President), 2014-2016.

• • Canadian Geophysical Union (Biogeosciences Section) Executive Board (Vice President), 2012-2014.

• • Canadian Geophysical Union (Biogeosciences Section) Executive Board (Member at Large), 2010-2012.

• GEOG 102 - Global Environmental Systems: Processes and Change
  • Taught in 2023, 2025
• GEOG 207 - Climate Change Fundamentals
  • Taught in 2026
• GEOG 303 - Physical Hydrology
  • Taught in 2021, 2023, 2024, 2025, 2026
• GEOG 391 - Field Research
  • Taught in 2026
• GEOG 407 - Environmental Hydrology of Terrestrial Ecosystems
  • Taught in 2021, 2023, 2024, 2025, 2026
• GEOG 640 - Foundations in Environmental Science
  • Taught in 2021, 2022, 2023, 2024, 2025
• GEOG 646 - Hydrology
  • Taught in 2025
• GEOG 675 - Selected Topics in Geography
  • Taught in 2021

* Only courses taught in the past 5 years are displayed.

• Negri C., Ezzati G., Haygarth P.M., Macrae M.L., Mellander P.-E., Spears B.M., Trojahn S., Wandel J., and Stutter M., How will climate change influence phosphorus systems? An expert elicitation approach, Journal of Environmental Quality, Volume 55, Canada, 2026.

• Wilson H., Vivekananthan K., Macrae M., Elliott J., Schneider K., Thiessen Martens J., and Glenn A., Multiyear changes in snowmelt phosphorus runoff with soil P drawdown or application of struvite to an organic forage crop, Journal of Environmental Quality, Volume 54, 1985-1995, Canada, 2025.

• Wilson H., Elliott J., Macrae M., Kokulan V., and Glenn A., Evaluating the potential for snowmelt phosphorus losses from perennial forage crops, Journal of Environmental Quality, Volume 54, 1103-1113, Canada, 2025.

• Shober A.L., Simpson Z.P., Jarvie H.P., Macrae M.L., Kleinman P.J.A., Haygarth P.M., Kulesza S., Gatiboni L., and Davies J., Toward a transdisciplinary and unifying definition of legacy phosphorus, Journal of Environmental Quality, Volume 54, 882-892, United States, 2025.

• Macrae M.L., Kleinman P.J.A., Osmond D., Shober A., and Nelson N., The importance of consensus science to managing phosphorus in the environment: SERA-17 and the legacy of Andrew Sharpley, Journal of Environmental Quality, Volume 54, 798-806, Canada, 2025.

• Kokulan V., Schneider K., McDonald M.R., and Macrae M.L., Potential of 4R Nutrient Stewardship to reduce phosphorus losses from cultivated organic soils, Environmental Reviews, Volume 33, Canada, 2025.

• Hanke K., Singh N.K., Basu N.B., Michaud A., Yang W., and Macrae M.L., Going underground: Changing climate and flow seasonality may increase subsurface flow contribution and modify dissolved nutrient, Journal of Great Lakes Research, Volume 50, Canada, 2024.

• Kaur B., Dhiman J., Rudra R.P., Daggupati P., Goel P., Macrae M., Prasher S., and Shukla R., EVALUATION OF WINTER HYDROLOGY PERFORMANCE OF THREE FIELD-SCALE MODELS, Journal of the Asabe, Volume 67, 809-822, Canada, 2024.

• Fairbairn L., Rezanezhad F., Gharasoo M., Parsons C.T., Macrae M.L., Slowinski S., and Van Cappellen P., Relationship between soil CO2 fluxes and soil moisture: Anaerobic sources explain fluxes at high water content, Geoderma, Volume 127, Canada, 2023.

• Brouwer R., Pinto R., Garcia-Hernandez J., Li X., Macrae M., Rajsic P., Yang W., Liu Y., Anderson M., and Heyming L., Spatial optimization of nutrient reduction measures on agricultural land to improve water quality: A coupled modeling approach, Canadian Journal of Agricultural Economics, Volume 71, 329-353, Canada, 2023.

• Macrae M.L., Plach J.M., Carlow R., Little C., Jarvie H.P., McKague K., Pluer W.T., and Joosse P., Trade-offs in nutrient and sediment losses in tile drainage from no-till versus conventional conservation-till cropping systems, Journal of Environmental Quality, Volume 52, 1011-1023, Canada, 2023.

• Welikhe P., Williams M.R., King K., Bos J., Akland M., Baffaut C., Beck E.G., Bierer A., Bosch D.D., Brooks E.S., Buda A.R., Cavigelli M., Faulkner J., Feyereisen G.W., Fortuna A.-M., Gamble J., Hanrahan B.R., Hussain M.Z., Kovar J.L., Lee B., Leytem A.B., Liebig M.A., Line D., Macrae M.L., Moorman T.B., Moriasi D., Mumbi R., Nelson N., Ortega-Pieck A., Osmond D., Penn C., Pisani O., Reba M.L., Smith D.R., Unrine J., Webb P., White K.E., Wilson H., and Witthaus L.M., Uncertainty in phosphorus fluxes and budgets across the US long-term agroecosystem research network, Journal of Environmental Quality, Volume 52, 873-885, United States, 2023.

• Kokulan V., Morison M.Q., Plach J.M., Ali G.A., Lobb D.A., and Macrae M.L., Phosphorus dynamics in agricultural surface runoff at the edge of the field and in ditches during overbank flooding conditions i, Canadian Water Resources Journal, Volume 48, 327-339, Canada, 2023.

• Jarvie H.P., Macrae M.L., Anderson M., Celmer-Repin D., Plach J., and King S.M., River metabolic fingerprints and regimes reveal ecosystem responses to enhanced wastewater treatment, Journal of Environmental Quality, Volume 51, 811-825, Canada, 2022.

• Plach J.M., Macrae M.L., Wilson H.F., Costa D., Kokulan V., Lobb D.A., and King K.W., Influence of climate, topography, and soil type on soil extractable phosphorus in croplands of northern glacial-derived landscap, Journal of Environmental Quality, Volume 51, 731-744, Canada, 2022.

• De Haan K., Khomik M., Kessel E., Green A., Kompanizare M., Helgason W., Macrae M.L., and Petrone R.M., Vegetation-related influences on carbon and water dynamics of two temperate forage crops, Agronomy Journal, Volume 114, 1782-1799, Canada, 2022.

• Williams M.R., Welikhe P., Bos J., King K., Akland M., Augustine D., Baffaut C., Beck E.G., Bierer A., Bosch D.D., Boughton E., Brandani C., Brooks E., Buda A., Cavigelli M., Faulkner J., Feyereisen G., Fortuna A., Gamble J., Hanrahan B., Hussain M., Kohmann M., Kovar J., Lee B., Leytem A., Liebig M., Line D., Macrae M., Moorman T., Moriasi D., Nelson N., Ortega-Pieck A., Osmond D., Pisani O., Ragosta J., Reba M., Saha A., Sanchez J., Silveira M., Smith D., Spiegal S., Swain H., Unrine J., Webb P., White K., Wilson H., and Yasarer L., P-FLUX: A phosphorus budget dataset spanning diverse agricultural production systems in the United States and Canada, Journal of Environmental Quality, Volume 51, 451-461, United States, 2022.

• Golmohammadi G., Rudra R.P., Parkin G.W., Kulasekera P.B., Macrae M., and Goel P.K., Assessment of impacts of climate change on tile discharge and nitrogen yield using the drainmod model, Hydrology, Volume 8, 1-16, Canada, 2021.

• Macrae M., Jarvie H., Brouwer R., Gunn G., Reid K., Joosse P., King K., Kleinman P., Smith D., Williams M., and Zwonitzer M., One size does not fit all: Toward regional conservation practice guidance to reduce phosphorus loss risk in the Lake Erie waters, Journal of Environmental Quality, Volume 50, 529-546, Canada, 2021.

• Volik O., Petrone R.M., Quanz M., Macrae M.L., Rooney R., and Price J.S., Environmental Controls on CO2 Exchange along a Salinity Gradient in a Saline Boreal Fen in the Athabasca Oil Sands Region, Wetlands, Volume 40, 1353-1366, Canada, 2020.

• Jarvie H.P., Pallett D.W., Schafer S.M., Macrae M.L., Bowes M.J., Farrand P., Warwick A.C., King S.M., Williams R.J., Armstrong L., Nicholls D.J.E., Lord W.D., Rylett D., Roberts C., and Fisher N., Biogeochemical and climate drivers of wetland phosphorus and nitrogen release: Implications for nutrient legacies and eutrophica, Journal of Environmental Quality, Volume 49, 1703-1716, Canada, 2020.

• Pluer W.T., Macrae M., Buckley A., and Reid K., Contribution of preferential flow to tile drainage varies spatially and temporally, Vadose Zone Journal, Volume 19, Canada, 2020.

• Shafii M., Craig J.R., Macrae M.L., English M.C., Schiff S.L., Van Cappellen P., and Basu N.B., Can Improved Flow Partitioning in Hydrologic Models Increase Biogeochemical Predictability?, Water Resources Research, Volume 55, 2939-2960, Canada, 2019.

• Morison M.Q., Volik O., Hall R.I., Wiklund J.A., Macrae M.L., and Petrone R.M., Effects of shoreline permafrost thaw on nutrient dynamics and diatom ecology in a subarctic tundra pond, Journal of Paleolimnology, Volume 62, 151-163, Canada, 2019.

• Macrae M.L., Ali G.A., King K.W., Plach J.M., Pluer W.T., Williams M., Morison M.Q., and Tang W., Evaluating hydrologic response in tile-drained landscapes: Implications for phosphorus transport, Journal of Environmental Quality, Volume 48, 1347-1355, Canada, 2019.

• Smith D.R., Macrae M.L., Kleinman P.J.A., Jarvie H.P., King K.W., and Bryant R.B., The latitudes, attitudes, and platitudes of watershed phosphorus management in North America, Journal of Environmental Quality, Volume 48, 1176-1190, United States, 2019.

• Liu J., Baulch H.M., Macrae M.L., Wilson H.F., Elliott J.A., Bergstrom L., Glenn A.J., and Vadas P.A., Agricultural water quality in cold climates: Processes, drivers, management options, and research needs, Journal of Environmental Quality, Volume 48, 792-802, Canada, 2019.

• Plach J., Pluer W., Macrae M., Kompanizare M., McKague K., Carlow R., and Brunke R., Agricultural edge-of-field phosphorus losses in Ontario, Canada: Importance of the nongrowing season in cold regions, Journal of Environmental Quality, Volume 48, 813-821, Canada, 2019.

• Kokulan V., Macrae M.L., Lobb D.A., and Ali G.A., Contribution of overland and tile flow to runoff and nutrient losses from vertisols in Manitoba, Canada, Journal of Environmental Quality, Volume 48, 959-965, Canada, 2019.

• Wilson H., Elliott J., Macrae M., and Glenn A., Near-surface soils as a source of phosphorus in snowmelt runoff from cropland, Journal of Environmental Quality, Volume 48, 921-930, Canada, 2019.

• Cober J.R., Macrae M.L., and Van Eerd L.L., Winter phosphorus release from cover crops and linkages with runoff chemistry, Journal of Environmental Quality, Volume 48, 907-914, Canada, 2019.

• Liu J., Macrae M.L., Elliott J.A., Baulch H.M., Wilson H.F., and Kleinman P.J.A., Impacts of cover crops and crop residues on phosphorus losses in cold climates: A review, Journal of Environmental Quality, Volume 48, 850-868, Canada, 2019.

• Grant K.N., Macrae M.L., Rezanezhad F., and Lam W.V., Nutrient leaching in soil affected by fertilizer application and frozen ground, Vadose Zone Journal, Volume 18, Canada, 2019.

• Volik O., Petrone R.M., Hall R.I., Macrae M.L., Wells C.M., and Price J.S., Organic matter accumulation and salinity change in open water areas within a saline boreal fen in the Athabasca Oil Sands Region, Catena, Volume 127, 425-433, Canada, 2018.

• Plach J.M., Macrae M.L., Ali G.A., Brunke R.R., English M.C., Ferguson G., Lam W.V., Lozier T.M., McKague K., O'Halloran I.P., Opolko G., and Van Esbroeck C.J., Supply and transport limitations on phosphorus losses from agricultural fields in the lower Great Lakes Region, Canada, Journal of Environmental Quality, Volume 47, 96-105, Canada, 2018.

• Cober J.R., Macrae M.L., and Van Eerd L.L., Nutrient release from living and terminated cover crops under variable freeze–thaw cycles, Agronomy Journal, Volume 110, 1036-1045, Canada, 2018.

• Ali G., Macrae M., Walker M., Laing J., and Lobb D., Preferential Flow in Vertisolic Soils with and without Organic Amendments, Agricultural and Environmental Letters, Volume 3, 1-5, Canada, 2018.

• Volik O., Petrone R.M., Hall R.I., Macrae M.L., Wells C.M., Elmes M.C., and Price J.S., Long-term precipitation-driven salinity change in a saline, peat-forming wetland in the Athabasca Oil Sands Region, Canada: a di, Journal of Paleolimnology, Volume 58, 533-550, Canada, 2017.

• Van Esbroeck C.J., MacRae M.L., Brunke R.R., and McKague K., Surface and subsurface phosphorus export from agricultural fields during peak flow events over the nongrowing season in regions , Journal of Soil and Water Conservation, Volume 72, 65-76, Canada, 2017.

• Nwaishi F., Petrone R.M., Macrae M.L., Price J.S., Strack M., Slawson R., and Andersen R., Above and below-ground nutrient cycling: A criteria for assessing the biogeochemical functioning of a constructed fen, Applied Soil Ecology, Volume 98, 177-194, Canada, 2016.

• Lam W.V., Macrae M.L., English M.C., O'Halloran I.P., and Wang Y.T., Effects of tillage practices on phosphorus transport in tile drain effluent under sandy loam agricultural soils in Ontario, Cana, Journal of Great Lakes Research, Volume 42, 1260-1270, Canada, 2016.

• Lam W.V., Macrae M.L., English M.C., O'Halloran I.P., Plach J.M., and Wang Y., Seasonal and event-based drivers of runoff and phosphorus export through agricultural tile drains under sandy loam soil in a coo, Hydrological Processes, Volume 30, 2644-2656, Canada, 2016.

• Macdonald L.A., Farquharson N., Merritt G., Fooks S., Medeiros A.S., Hall R.I., Wolfe B.B., Macrae M.L., and Sweetman J.N., Limnological regime shifts caused by climate warming and Lesser Snow Goose population expansion in the western Hudson Bay Lowlan, Ecology and Evolution, Volume 5, 921-939, Canada, 2015.

• Williams M.R., King K.W., Macrae M.L., Ford W., Van Esbroeck C., Brunke R.I., English M.C., and Schiff S.L., Uncertainty in nutrient loads from tile-drained landscapes: Effect of sampling frequency, calculation algorithm, and compositing, Journal of Hydrology, Volume 127, 306-316, United States, 2015.

• King K.W., Williams M.R., Macrae M.L., Fausey N.R., Frankenberger J., Smith D.R., Kleinman P.J.A., and Brown L.C., Phosphorus transport in agricultural subsurface drainage: A review, Journal of Environmental Quality, Volume 44, 467-485, United States, 2015.

• MacRae M., Brown L., Duguay C., Parrott J., and Petrone R., Observed and projected climate change in the churchill region of the Hudson Bay lowlands and implications for pond sustainabilit, Arctic Antarctic and Alpine Research, Volume 46, 272-285, Canada, 2015.

• Andersen R., Wells C., Macrae M., and Price J., Nutrient mineralisation and microbial functional diversity in a restored bog approach natural conditions 10 years post restorati, Soil Biology and Biochemistry, Volume 64, 37-47, Canada, 2015.

• Macrae M.L., Devito K.J., Strack M., and Waddington J.M., Erratum to: Effect of water table drawdown on peatland nutrient dynamics: Implications for climate change (Biogeochemistry, 10.1, Biogeochemistry, Volume 112, 677, Canada, 2015.

• Macrae M.L., Devito K.J., Strack M., and Waddington J.M., Effect of water table drawdown on peatland nutrient dynamics: Implications for climate change, Biogeochemistry, Volume 112, 661-676, Canada, 2015.

• Macrae M.L., Zhang Z., Stone M., Price J.S., Bourbonniere R.A., and Leach M., Subsurface mobilization of phosphorus in an agricultural riparian zone in response to flooding from an upstream reservoir, Canadian Water Resources Journal, Volume 36, 293-311, Canada, 2015.

• Petrone R.M., Solondz D.S., Macrae M.L., Gignac D., and Devito K.J., Microtopographical and canopy cover controls on moss carbon dioxide exchange in a western Boreal Plain peatland, Ecohydrology, Volume 4, 115-129, Canada, 2015.

• DeSimone J., Macrae M.L., and Bourbonniere R.A., Spatial variability in surface N2O fluxes across a riparian zone and relationships with soil environmental conditions and nutrie, Agriculture Ecosystems and Environment, Volume 127, 1-9, Canada, 2015.

• Branfireun B.A., and MacRae M.L., Advances in canadian research coupling hydrology and water quality, 2003-2007, Canadian Water Resources Journal, Volume 34, 187-194, Canada, 2015.

• Macrae M.L., Devito K.J., Creed I.F., and Macdonald S.E., Relation of soil-, surface-, and ground-water distributions of inorganic nitrogen with topographic position in harvested and unh, Canadian Journal of Forest Research, Volume 36, 2090-2103, Canada, 2015.

• Petrone R.M., Devito K.J., Kaufman S., Macrae M.L., and Waddington J.M., Potential carbon losses from boreal pond and riparian areas: Influence of temperature and drought, IAHS AISH Publication, 10-18, Canada, 2015.

• Macrae M.L., Redding T.E., Creed I.F., Bell W.R., and Devito K.J., Soil, surface water and ground water phosphorus relationships in a partially harvested Boreal Plain aspen catchment, Forest Ecology and Management, Volume 127, 315-329, Canada, 2015.

• Macrae M.L., Bello R.L., and Molot L.A., Long-term carbon storage and hydrological control of CO2 exchange in tundra ponds in the Hudson Bay Lowland, Hydrological Processes, Volume 18, 2051-2069, Canada, 2015.

• White J., Hall R., Wolfe B., Light E., MacRae M., and Fishback L., Hydrological connectivity and basin morphometry influence seasonal water-chemistry variations in tundra ponds of the northwester, Arctic Antarctic and Alpine Research, Volume 46, 218-235, Canada, 2015.

• MacDonald L., Farquharson N., Hall R., Wolfe B., MacRae M., and Sweetman J., Avian-driven modification of seasonal carbon cycling at a tundra pond in the Hudson Bay lowlands (Northern Manitoba, Canada), Arctic Antarctic and Alpine Research, Volume 46, 206-217, Canada, 2015.

• Eichel K., MacRae M., Hall R., Fishback L., and Wolfe B., Nutrient uptake and short-term responses of phytoplankton and benthic algal communities from a subarctic pond to experimental nu, Arctic Antarctic and Alpine Research, Volume 46, 191-205, Canada, 2015.

• Wolfe B.B., Light E.M., MacRae M.L., Hall R.I., Eichel K., Jasechko S., White J., Fishback L., and Edwards T.W.D., Divergent hydrological responses to 20th century climate change in shallow tundra ponds, western Hudson Bay Lowlands, Geophysical Research Letters, Volume 38, Canada, 2015.

• Macrae M.L., English M.C., Schiff S.L., and Stone M., Influence of antecedent hydrologic conditions on patterns of hydrochemical export from a first-order agricultural watershed in S, Journal of Hydrology, Volume 127, 101-110, Canada, 2014.

• Petrone R.M., Chahil P., Macrae M.L., and English M.C., Spatial variability of CO2 exchange for riparian and open grasslands within a first-order agricultural basin in Southern Ontario, Agriculture Ecosystems and Environment, Volume 125, 137-147, Canada, 2015.

• Macrae M.L., English M.C., Schiff S.L., and Stone M., Intra-annual variability in the contribution of tile drains to basin discharge and phosphorus export in a first-order agricultur, Agricultural Water Management, Volume 92, 171-182, Canada, 2014.

• Macrae M.L., English M.C., Schiff S.L., and Stone M., Capturing temporal variability for estimates of annual hydrochemical export from a first-order agricultural catchment in souther, Hydrological Processes, Volume 21, 1651-1663, Canada, 2014.

• Petrone R.M., Smith C., Macrae M.L., and English M.C., Riparian zone equilibrium and actual evapotranspiration in a first order agricultural catchment in Southern Ontario, Canada, Agricultural Water Management, Volume 86, 240-248, Canada, 2015.

• Molot L.A., Keller W., Leavitt P.R., Robarts R.D., Waiser M.J., Arts M.T., Clair T.A., Pienitz R., Yan N.D., McNicol D.K., Prairie Y.T., Dillon P.J., Macrae M., Bello R., Nordin R.N., Curtis P.J., Smol J.P., and Douglas M.S.V., Risk analysis of dissolved organic matter-mediated ultraviolet B exposure in Canadian inland waters, Canadian Journal of Fisheries and Aquatic Sciences, Volume 61, 2511-2521, Canada, 2004.

• Macrae M.L., English M.C., Schiff S.L., and Stone M.A., Phosphate retention in an agricultural stream using experimental additions of phosphate, Hydrological Processes, Volume 17, 3649-3663, Canada, 2014.

• O'Connell D.W., Coulson P., Rezanezhad F., Mills A., Lima A.T., Driedger A.G.J., Durr H.H., Macrae M., Elgood R., Parsons C.T., Roy A., Schiff S., and Cappellen P.V., Multi-stable isotope tracing of elevated sulfate export from a forested headwater wetland following an induced flood pulse event, Journal of Hydrology, Volume 127, Canada.

• Coppolino J., Munford K.E., Macrae M., and Glasauer S., Shifts in soil phosphorus fractions during seasonal transitions in a riparian floodplain wetland, Frontiers in Environmental Science, Volume 10, Canada.

• Ljutic A., Ali G., Van Eerd L., Macrae M., and Wagner-Riddle C., Comparing Seasonal Soil Water Storage and Flow Processes Under Different Soil Conditions, Hydrological Processes, Volume 40, Canada.

• Gospodyn L., Jarvie H., Williams M., Plach J., and Macrae M., Separating flow components in tile drainage and streamflow in a headwater agricultural catchment, Journal of Hydrology Regional Studies, Volume 63, Canada.

• Noyes I., Koiter A., Jarvie H.P., Plach J.M., Lobb D.A., Glasauer S., and Macrae M.L., Potential phosphorus mobilization from riparian vegetation following freezing, Journal of Environmental Management, Volume 127, Canada.

• Montgomery K., James A.L., Macrae M., Tafvizi A., Snider R., Goel P., Zhang H., Yao H., and Wachowiak M., Constraining seasonal and spatial ambient and urban groundwater contributions to streamflow across a mixed land-use regional-sca, Journal of Hydrology, Volume 127, Canada.

• Liu J., Lobb D.A., Elliott J.A., Macrae M.L., Baulch H.M., and Costa D., The potential to reduce runoff generation through improving cropping and tillage practices in a sub-humid continental climate, Climate Smart Agriculture, Volume 1, Canada.

• Williamson J.A., Petrone R.M., Valentini R., Macrae M.L., and Reynolds A., Assessing the influence of climate controls on grapevine biophysical responses: a review of Ontario viticulture in a changing cl, Canadian Journal of Plant Science, Volume 104, 394-409, Canada.

• Kompanizare M., Costa D., Macrae M.L., Pomeroy J.W., and Petrone R.M., Developing a tile drainage module for the Cold Regions Hydrological Model: lessons from a farm in southern Ontario, Canada, Hydrology and Earth System Sciences, Volume 28, 2785-2807, Canada.

• Ljutic A., Moore J., Ali G., Van Eerd L., Macrae M.L., and Wagner-Riddle C., Variable soil moisture responses to rainfall events in fields under different management practices, Hydrological Processes, Volume 38, Canada.

• Kokulan V., Schneider K., Macrae M.L., and Wilson H., Struvite application to field corn decreases the risk of environmental phosphorus loss while maintaining crop yield, Agriculture Ecosystems and Environment, Volume 127, Canada.

• Carlow R., Plach J.M., Pluer W.T., Lam W.V., Kompanizare M., Brunke R., McKague K., Jarvie H.P., and Macrae M.L., Performance of simple low-cost edge-of-field filters for mitigating P losses in surface runoff from agricultural fields, Agricultural Water Management, Volume 127, Canada.

• Pluer W.T., Plach J.M., Hassan A., Price D., and Macrae M.L., Retention of phosphorus in soils receiving bunker silo effluent, Journal of Environmental Management, Volume 127, Canada.

• Nwaishi F., Morison M., Plach J., Macrae M., and Petrone R., Carbon and Nutrient Stoichiometric Relationships in the Soil–Plant Systems of Disturbed Boreal Forest Peatlands within Athabas, Forests, Volume 13, Canada.

• Kompanizare M., Petrone R.M., Macrae M.L., De Haan K., and Khomik M., Assessment of effective LAI and water use efficiency using Eddy Covariance data, Science of the Total Environment, Volume 127, Canada.

• Costa D., Pomeroy J.W., Brown T., Baulch H., Elliott J., and Macrae M., Advances in the simulation of nutrient dynamics in cold climate agricultural basins: Developing new nitrogen and phosphorus modu, Journal of Hydrology, Volume 127, Canada.

• Liu J., Elliott J.A., Wilson H.F., Macrae M.L., Baulch H.M., and Lobb D.A., Phosphorus runoff from Canadian agricultural land: A dataset for 30 experimental fields, Data in Brief, Volume 38, Canada.

• Price D.W., Plach J.M., Jarvie H.P., and Macrae M.L., Contribution of bunker silo effluent discharged via a riparian zone to watershed phosphorus loads, Journal of Great Lakes Research, Volume 47, 1296-1304, Canada.

• Liu J., Elliott J.A., Wilson H.F., Macrae M.L., Baulch H.M., and Lobb D.A., Phosphorus runoff from Canadian agricultural land: A cross-region synthesis of edge-of-field results, Agricultural Water Management, Volume 127, Canada.

• De Haan K., Khomik M., Green A., Helgason W., Macrae M.L., Kompanizare M., and Petrone R.M., Assessment of different water use efficiency calculations for dominant forage crops in the great lakes basin, Agriculture Switzerland, Volume 11, Canada.

• Kokulan V., Macrae M.L., Ali G.A., Lobb D.A., Morison M., and Brooks B.C., Temporal variability in water and nutrient movement through vertisols into agricultural tile drains in the northern Great Plains, Journal of Soil and Water Conservation, Volume 76, 317-328, Canada.

• Morison M., van Beest C., Macrae M., Nwaishi F., and Petrone R., Deeper burning in a boreal fen peatland 1-year post-wildfire accelerates recovery trajectory of carbon dioxide uptake, Ecohydrology, Volume 14, Canada.

• Elmes M.C., Kessel E., Wells C.M., Sutherland G., Price J.S., Macrae M.L., and Petrone R.M., Evaluating the hydrological response of a boreal fen following the removal of a temporary access road, Journal of Hydrology, Volume 127, Canada.

• Menzies Pluer E.G., Robinson D.T., Meinen B.U., and Macrae M.L., Pairing soil sampling with very-high resolution UAV imagery: An examination of drivers of soil and nutrient movement and agricul, Geoderma, Volume 127, Canada.

• Nwaishi F.C., Morison M.Q., Van Huizen B., Khomik M., Petrone R.M., and Macrae M.L., Growing season CO2 exchange and evapotranspiration dynamics among thawing and intact permafrost landforms in the Western Hudson , Permafrost and Periglacial Processes, Volume 31, 509-523, Canada.

• Hanrahan B.R., King K.W., Macrae M.L., Williams M.R., and Stinner J.H., Among-site variability in environmental and management characteristics: Effect on nutrient loss in agricultural tile drainage, Journal of Great Lakes Research, Volume 46, 486-499, United States.

• Irvine C., Macrae M., Morison M., and Petrone R., Seasonal nutrient export dynamics in a mixed land use subwatershed of the Grand River, Ontario, Canada, Journal of Great Lakes Research, Volume 45, 1171-1181, Canada.

• van Beest C., Petrone R., Nwaishi F., Waddington J.M., and Macrae M., Increased peatland nutrient availability following the Fort McMurray horse River wildfire, Diversity, Volume 11, Canada.

• Grant K.N., Macrae M.L., and Ali G.A., Differences in preferential flow with antecedent moisture conditions and soil texture: Implications for subsurface P transport, Hydrological Processes, Volume 33, 2068-2079, Canada.

• Kokulan V., Macrae M.L., Ali G.A., and Lobb D.A., Hydroclimatic controls on runoff activation in an artificially drained, near-level vertisolic clay landscape in a Prairie climat, Hydrological Processes, Volume 33, 602-615, Canada.

• Haque A., Ali G., Macrae M., Badiou P., and Lobb D., Hydroclimatic influences and physiographic controls on phosphorus dynamics in prairie pothole wetlands, Science of the Total Environment, Volume 127, 1410-1424, Canada.

• Plach J.M., Macrae M.L., Williams M.R., Lee B.D., and King K.W., Dominant glacial landforms of the lower Great Lakes region exhibit different soil phosphorus chemistry and potential risk for ph, Journal of Great Lakes Research, Volume 44, 1057-1067, Canada.

• Depante M., Petrone R.M., Devito K.J., Kettridge N., Macrae M.L., Mendoza C., and Waddington J.M., Potential influence of nutrient availability along a hillslope: Peatland gradient on aspen recovery following fire, Ecohydrology, Volume 11, Canada.

• Gingras-Hill T., Nwaishi F.C., Macrae M.L., Price J.S., and Petrone R.M., Ecohydrological functioning of an upland undergoing reclamation on post-mining landscape of the Athabasca oil sands region, Cana, Ecohydrology, Volume 11, Canada.

• Morison M.Q., Macrae M.L., Petrone R.M., and Fishback L., Climate-induced changes in nutrient transformations across landscape units in a thermokarst subarctic peatland, Arctic Antarctic and Alpine Research, Volume 50, Canada.

• Morison M.Q., Macrae M.L., Petrone R.M., and Fishback L., Capturing temporal and spatial variability in the chemistry of shallow permafrost ponds, Biogeosciences, Volume 14, 5471-5485, Canada.

• Plach J.M., Wood M.E., Macrae M.L., Osko T.J., and Petrone R.M., Effect of a semi-permanent road on N, P, and CO2 dynamics in a poor fen on the Western Boreal Plain, Canada, Ecohydrology, Volume 10, Canada.

• Lozier T.M., Macrae M.L., Brunke R., and Van Eerd L.L., Release of phosphorus from crop residue and cover crops over the non-growing season in a cool temperate region, Agricultural Water Management, Volume 127, 39-51, Canada.

• Lozier T.M., and Macrae M.L., Potential phosphorus mobilization from above-soil winter vegetation assessed from laboratory water extractions following freezeâ, Canadian Water Resources Journal, Volume 42, 276-288, Canada.

• Morison M.Q., Macrae M.L., Petrone R.M., and Fishback L., Seasonal dynamics in shallow freshwater pond-peatland hydrochemical interactions in a subarctic permafrost environment, Hydrological Processes, Volume 31, 462-475, Canada.

• Van Esbroeck C.J., Macrae M.L., Brunke R.I., and McKague K., Annual and seasonal phosphorus export in surface runoff and tile drainage from agricultural fields with cold temperate climates, Journal of Great Lakes Research, Volume 42, 1271-1280, Canada.

• Nwaishi F., Petrone R.M., Macrae M.L., Price J.S., Strack M., and Andersen R., Preliminary assessment of greenhouse gas emissions from a constructed fen on post-mining landscape in the Athabasca oil sands re, Ecological Engineering, Volume 95, 119-128, Canada.

• Wood M.E., Macrae M.L., Strack M., Price J.S., Osko T.J., and Petrone R.M., Spatial variation in nutrient dynamics among five different peatland types in the Alberta oil sands region, Ecohydrology, Volume 9, 688-699, Canada.