The effect of agricultural runoff on freshwater biodiversity and ecosystem functioning

Nutrient runoff from agricultural operations threatens aquatic health and can have enduring and intricate consequences for the environment, ecological systems, and human populations. A comprehensive quantitative study of the literature was performed to identify various Nutrient Runoff Mitigation Systems (NR-MS) employed worldwide to avoid or repair environmental harm caused by excessive agricultural fertilization. Practical information on results from multiple NR-MS in the examined research was utilized to assess the methods based on ecological advantages, implementation costs, and feasibility. A comprehensive evaluation of the viability of NR-MS was conducted, along with a macro-level analysis of the obstacles hindering its widespread deployment. Recognized research deficiencies encompassed a scarcity of literature addressing nutrient runoff reduction, skepticism among farmers regarding voluntary policy adoption without significant incentives, and an overall absence of cost/benefit analyses, such as insights into the uncertainties related to NR-MS that could guide decision-makers in formulating successful and effective methods for various site conditions. The combination of review information enabled the creation of a complete decision-making structure to govern nutrient runoff, addressing current constraints and offering local NR-MS suggestions for regulators to adopt.