The need to integrate legacy nitrogen storage dynamics and time lags into policy and practice

Ascott, M.J. and Gooddy, D.C. and Fenton, O. and Vero, S. and Ward, R.S. and Basu, N.B. and Worrall, F. and Van Meter, K. and Surridge, B.W.J. (2021) The need to integrate legacy nitrogen storage dynamics and time lags into policy and practice. Science of the Total Environment, 781: 146698. ISSN 0048-9697

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Increased fluxes of reactive nitrogen (Nr), often associated with N fertilizer use in agriculture, have resulted in negative environmental consequences, including eutrophication, which cost billions of dollars per year globally. To address this, best management practices (BMPs) to reduce Nr loading to the environment have been introduced in many locations. However, improvements in water quality associated with BMP implementation have not always been realised over expected timescales. There is a now a significant body of scientific evidence showing that the dynamics of legacy Nr storage and associated time lags invalidate the assumptions of many models used by policymakers for decision making regarding Nr BMPs. Building on this evidence, we believe that the concepts of legacy Nr storage dynamics and time lags need to be included in these models. We believe the biogeochemical research community could play a more proactive role in advocating for this change through both awareness raising and direct collaboration with policymakers to develop improved datasets and models. We anticipate that this will result in more realistic expectations of timescales for water quality improvements associated with BMPs. Given the need for multi-nutrient policy responses to tackle challenges such as eutrophication, integration of N stores will have the further benefit of aligning both researchers and policymakers in the N community with the phosphorus and carbon communities, where estimation of stores is more widespread. Ultimately, we anticipate that integrating legacy Nr storage dynamics and time lags into policy frameworks will better meet the needs of human and environmental health.

Item Type:
Journal Article
Journal or Publication Title:
Science of the Total Environment
Additional Information:
This is the author’s version of a work that was accepted for publication in Science of the Total Environment. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Science of the Total Environment, 781, 2021 DOI: 10.1016/j.scitotenv.2021.146698
Uncontrolled Keywords:
?? legacy pollutionnitrogentime lagwater pollutionenvironmental chemistrypollutionenvironmental engineeringwaste management and disposal ??
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Deposited On:
28 Apr 2021 09:10
Last Modified:
15 Jul 2024 21:34