10.18453/rosdok_id00005020 Joseph dit Choisnard, Noémie Noémie Joseph dit Choisnard http://d-nb.info/gnd/1383324786 https://orcid.org/0000-0002-6863-8030 Universität Rostock 2024 540 Chemistry & allied sciences 550 Earth sciences 570 Life science 2024 en https://purl.uni-rostock.de/rosdok/id00005020 urn:nbn:de:gbv:28-rosdok_id00005020-3 Human activities have changed the global N cycle, increasing N fluxes into the ocean, particularly affecting vulnerable coastal zones. Along the Amazon River Plume, sediments potentially act as both a source and sink of DIN. While denitrification appears to be a significant loss process in sediment, nitrification dominates in the water column. This study's findings draw an N-budget of the Amazon estuary based on rates of N cycle pathways, providing baseline knowledge for environmental management and conservation efforts amidst climate change and human-induced alterations to the N cycle.