Global importance of nitrogen fixation across inland and coastal waters

• 成果类型: Article
• 署名作者: Fulweiler, Robinson W.; Rinehart, Shelby; Taylor, Jason; Kelly, Michelle C.; Berberich, Megan E.; Ray, Nicholas E.; Oczkowski, Autumn; Balint, Sawyer; Benavides, Mar; Church, Matthew J.; Loeks, Brianna; Newell, Silvia; Olofsson, Malin; Oppong, Jimmy Clifford; Roley, Sarah S.; Vizza, Carmella; Wilson, Samuel T.; Chowdhury, Subhadeep; Groffman, Peter; Scott, J. Thad; Marcarelli, Amy M.
• 署名单位: Boston University; Boston University; Drexel University; United States Department of Agriculture (USDA); Michigan Technological University; University of Delaware; United States Environmental Protection Agency; NERC National Oceanography Centre; University of Southampton; Centre National de la Recherche Scientifique (CNRS); Institut de Recherche pour le Developpement (IRD); Aix-Marseille Universite; Aix-Marseille Universite; University of Montana System; University of Montana; University of Minnesota System; University of Minnesota Twin Cities; University of Michigan System; University of Michigan; Swedish University of Agricultural Sciences; Charles University Prague; Washington State University; Hawaii Pacific University; Newcastle University - UK; City University of New York (CUNY) System; Brooklyn College (CUNY); Cary Institute of Ecosystem Studies; Baylor University
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-11553
• DOI: 10.1126/science.adt1511
• 发表日期: 2025-06-12
• 页码: 1205-1209
• 关键词: acetylene-reduction; terrestrial biosphere; spatial variation; woodland stream; n-2 fixation; fresh-water; in-situ; marine; carbon; DYNAMICS

摘要

Biological nitrogen fixation is a key driver of global primary production and climate. Decades of effort have repeatedly updated nitrogen fixation estimates for terrestrial and open ocean systems, yet other aquatic systems in between have largely been ignored. Here we present an evaluation of nitrogen fixation for inland and coastal waters. We demonstrate that water column and sediment nitrogen fixation is ubiquitous across these diverse aquatic habitats, with rates ranging six orders of magnitude. We conservatively estimate that, despite accounting for less than 10% of the global surface area, inland and coastal aquatic systems fix 40 (30 to 54) teragrams of nitrogen per year, equivalent to 15% of the nitrogen fixed on land and in the open ocean. Inland systems contribute more than half of this biological nitrogen fixation.