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dc.contributor.authorMalik, Lamisa
dc.contributor.authorByrnes, Danyka Kimberly
dc.contributor.authorMcLeod, Meghan
dc.contributor.authorChang, Shuyu
dc.contributor.authorVan Meter, Kimberly
dc.contributor.authorBasu, Nandita B. 19:28:35 (GMT) 19:28:35 (GMT)
dc.description.abstractHuman activities over decades of agriculture and urbanization have altered phosphorus (P) cycling, posing a threat to water quality and ecosystem function. Algal blooms have become a pervasive problem in both small and large waterbodies across Canada. Despite concerted efforts to reduce P loading to surface waters, there has yet to be a noticeable improvement in water quality. This can be attributed to the accumulation of legacy P in the landscape as a result of excessive use of synthetic fertilizers and the production of livestock manure. These legacy P can reach the waterbodies decades after implementing P management practices. Therefore, to better understand long-term P dynamics and their drivers, it is crucial to develop long-term datasets of P inputs and outputs. We developed a 60-year (1961–2021), 250-meter grid resolution data of P components and P surplus across Canada. P surplus is the difference between P inputs (fertilizer inputs, livestock manure, detergent, and human waste) and non-hydrological P output (crop uptake). Our result shows the different drivers of P surplus across Canada. In Ontario and Quebec, the P surplus decreased from nutrient regulation programs in 1981 and subsequently rebounded in 2006 due to an increase in P fertilizer use. In prairie provinces, low P inputs and increasing crop yields have led to the mining of the P stores in the soils. This new, longer dataset will improve our understanding of long-term P dynamics and allow for explicit consideration of the impacts of legacy P on environmental outcomes.en
dc.description.sponsorshipThis research was undertaken thanks, in part, with support from the Global Water Futures Program funded by the Canada First Research Excellence Fund (CFREF).en
dc.publisherUniversity of Waterlooen
dc.relation.ispartofseriesGlobal Water Futures;
dc.subjectGWF ASOM 2023en
dc.subjectwater qualityen
dc.titleLegacy Phosphorus Across Canada: Insights from a 60-Year Dataseten
dc.typeConference Posteren
dcterms.bibliographicCitationMalik, L; Byrnes, D; McLeod, M; Chang, S; Van Meter, K & Basu, N. (2023) Legacy Phosphorus Across Canada: Insights from a 60-Year Dataset. Global Water Futures (GWF) Annual Open Science Meeting Conference. University of Waterloo.en
uws.contributor.affiliation1Faculty of Engineeringen
uws.contributor.affiliation2Civil and Environmental Engineeringen

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