{"title":"Legacy phosphorus as historical context across systems and scales","authors":"Graham K. MacDonald","doi":"10.1002/jeq2.70299","DOIUrl":"10.1002/jeq2.70299","url":null,"abstract":"","PeriodicalId":15732,"journal":{"name":"Journal of environmental quality","volume":"55 5","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149182218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A dual concept perspective on legacy phosphorus","authors":"Nathan O. Nelson","doi":"10.1002/jeq2.70286","DOIUrl":"10.1002/jeq2.70286","url":null,"abstract":"","PeriodicalId":15732,"journal":{"name":"Journal of environmental quality","volume":"55 5","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149137057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pauline Chivenge, Leonard Rusinamhodzi, Generose Nziguheba
{"title":"Legacy phosphorus in sub-Saharan Africa: A hidden resource or emerging liability?","authors":"Pauline Chivenge, Leonard Rusinamhodzi, Generose Nziguheba","doi":"10.1002/jeq2.70281","DOIUrl":"10.1002/jeq2.70281","url":null,"abstract":"","PeriodicalId":15732,"journal":{"name":"Journal of environmental quality","volume":"55 5","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149137130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Legacy phosphorus in Mediterranean regions","authors":"Antonio Rafael Sánchez-Rodríguez","doi":"10.1002/jeq2.70287","DOIUrl":"10.1002/jeq2.70287","url":null,"abstract":"","PeriodicalId":15732,"journal":{"name":"Journal of environmental quality","volume":"55 5","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149137117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A perspective on legacy phosphorus in Manitoba","authors":"Henry F. Wilson","doi":"10.1002/jeq2.70290","DOIUrl":"10.1002/jeq2.70290","url":null,"abstract":"","PeriodicalId":15732,"journal":{"name":"Journal of environmental quality","volume":"55 5","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149137108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Legacy phosphorus as a manageable stock: Linking past inputs to present and future outcomes","authors":"R. W. McDowell","doi":"10.1002/jeq2.70283","DOIUrl":"10.1002/jeq2.70283","url":null,"abstract":"","PeriodicalId":15732,"journal":{"name":"Journal of environmental quality","volume":"55 5","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149137076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Legacy P and water quality perspective","authors":"Sarah Stackpoole","doi":"10.1002/jeq2.70285","DOIUrl":"10.1002/jeq2.70285","url":null,"abstract":"<p>My research has focused on national-scale river phosphorus (P) water quality, which was motivated by a lack of apparent improvement despite considerable effort to manage or reduce nutrient inputs to freshwater ecosystems. In my work, I have defined legacy P as historical P surplus that has accumulated in a watershed over time, and it may be stored in agricultural soils, floodplains, or river sediments (Stackpoole et al., <span>2019</span>; Stackpoole et al., <span>2021</span>).</p><p>I focused on finding methods to quantify the relative contributions of contemporary as compared to legacy P sources on long-term river loads and concentrations at a national scale, using a nutrient budget approach to estimate the magnitude of legacy P stored in watersheds, where the net sum of major P inputs and outputs is calculated at an annual timestep (Stackpoole et al., <span>2019</span>; Sabo et al., <span>2021</span>; Stackpoole et al., <span>2021</span>). Inputs are fertilizer, manure, and wastewater, and the major output is crop P uptake and removal at harvest. A positive difference between inputs and outputs is considered a surplus and can be stored in the watershed and defined as legacy P. To better link the effects of historical legacy P to water quality conditions, I also developed a proxy estimate of legacy P contributions to river export (Stackpoole et al., <span>2019</span>). I estimated mean watershed river loads and P balances over a 20-year period. If the ratio of watershed mean river P export to the mean agricultural P balance was greater than one, I assumed that contemporary river P export in excess of the contemporary agricultural P balances was supported by legacy P sources.</p><p>A better understanding of the contribution of legacy and contemporary (current) sources to river P loads can be used to inform proper management actions and improve water quality. For example, in watersheds that had a P surplus and legacy P contributing to river P loads, a reduction in fertilizer and manure additions or increased drawdown of P in soils can be effective strategies to improve water quality (Zou et al., <span>2022</span>; Mott et al., <span>2025</span>). However, in some watersheds a reduction in P balances over time did not result in improved water quality conditions, or decreasing river P loads (Stackpoole et al., <span>2019</span>). In fact, P balances were still positive, even though they had decreased over time, and using our proxy estimate for legacy P, I determined that historical P was likely not a significant source to the river P loads. I hypothesized that a change in management practices had occurred. For example, a riparian buffer strip, which for years had prevented the surplus P from reaching the river had been removed, leading to an eventual increase in river P loads. I did not have national-scale datasets to characterize best management practice (BMP) changes across the watersheds over space or time. Improved documentation of various B","PeriodicalId":15732,"journal":{"name":"Journal of environmental quality","volume":"55 5","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13642505/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149110295","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Legacy P: A management-oriented perspective","authors":"Grace L. Miner, Joshua D. Mott","doi":"10.1002/jeq2.70270","DOIUrl":"10.1002/jeq2.70270","url":null,"abstract":"","PeriodicalId":15732,"journal":{"name":"Journal of environmental quality","volume":"55 5","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149081013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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