Han Olff (@hanolff.bsky.social)

Experimental evidence of the role of nitrogen for eutrophication in shallow lakes: A long-term climate effect mesocosm study The effectiveness of controlling nitrogen (N) loading (in addition to phosphorus [P]) to manage the eutrophication of aquatic ecosystems has been debated despite the role of N in producing algal biomass and toxins. Long-term, controlled tests of the efficacy of N loading reductions are largely missing from the scientific record, perhaps due to the historical focus on P control. To address this knowledge gap, we examined the results from a unique, long-term study conducted in 24 flow-through (2.5-month retention time) lake ecosystem-scale mesocosms in Denmark, operating since 2003 at two contrasting nutrient loading levels crossed with three temperature scenarios (ambient, IPCC (Intergovernmental Panel on Climate Change) A2 scenario, and A2+50%). https://www.cell.com/the-innovation/fulltext/S2666-6758(24)00194-2?_returnURL=https%3A%2F%2Flinkinghub.elsevier.com%2Fretrieve%2Fpii%2FS2666675824001942%3Fshowall%3Dtrue#:~:text=DOI%3A%2010.1016/j.xinn.2024.100756