Nitrogen cycling processes in sediments of the Pearl River Estuary: Spatial variations, controlling factors, and environmental implications

F Huang, X Lin, W Hu, F Zeng, L He, K Yin - Catena, 2021 - Elsevier
Numerous studies have unveiled the importance of nitrogen (N) transformation processes
over the past decades, but comprehensive studies of key N-cycling processes are still rare in …

Physical mixing in coastal waters controls and decouples nitrification via biomass dilution

S Haas, BM Robicheau, S Rakshit… - Proceedings of the …, 2021 - National Acad Sciences
Nitrification is a central process of the aquatic nitrogen cycle that controls the supply of
nitrate used in other key processes, such as phytoplankton growth and denitrification …

Denitrifying community in coastal sediments performs aerobic and anaerobic respiration simultaneously

HK Marchant, S Ahmerkamp, G Lavik… - The ISME …, 2017 - academic.oup.com
Nitrogen (N) input to the coastal oceans has increased considerably because of
anthropogenic activities, however, concurrent increases have not occurred in open oceans …

Regulation of benthic oxygen fluxes in permeable sediments of the coastal ocean

S Ahmerkamp, C Winter, K Krämer… - Limnology and …, 2017 - Wiley Online Library
Large areas of the oceanic shelf are composed of sandy sediments through which reactive
solutes are transported via porewater advection fueling active microbial communities. The …

Anammox bacteria drive fixed nitrogen loss in hadal trench sediments

B Thamdrup, C Schauberger… - Proceedings of the …, 2021 - National Acad Sciences
Benthic N2 production by microbial denitrification and anammox is the largest sink for fixed
nitrogen in the oceans. Most N2 production occurs on the continental shelves, where a high …

Metabolic specialization of denitrifiers in permeable sediments controls N2O emissions

HK Marchant, HE Tegetmeyer… - Environmental …, 2018 - Wiley Online Library
Coastal oceans receive large amounts of anthropogenic fixed nitrogen (N), most of which is
denitrified in the sediment before reaching the open ocean. Sandy sediments, which are …

Denitrification, anammox, and DNRA in oligotrophic continental shelf sediments

HLS Cheung, JR Hillman, CA Pilditch… - Limnology and …, 2024 - Wiley Online Library
Continental shelf sediments are considered hotspots for nitrogen (N) removal. While most
investigations have quantified denitrification in shelves receiving large amounts of …

Benthic dinitrogen fixation traversing the oxygen minimum zone off Mauritania (NW Africa)

J Gier, CR Löscher, AW Dale, S Sommer… - Frontiers in Marine …, 2017 - frontiersin.org
Despite its potential to provide new nitrogen (N) to the environment, knowledge on benthic
dinitrogen (N2) fixation remains relatively sparse, and its contribution to the marine N budget …

Dissolved benthic phosphate, iron and carbon fluxes in the Mauritanian upwelling system and implications for ongoing deoxygenation

U Schroller-Lomnitz, C Hensen, AW Dale… - Deep Sea Research …, 2019 - Elsevier
Benthic fluxes of total dissolved phosphate (TPO 4 3-), dissolved iron (Fe 2+), and dissolved
inorganic carbon (DIC) were determined in situ using benthic chambers at nine stations …

First evidence of anoxia and nitrogen loss in the southern Canary upwelling system

É Machu, X Capet, PA Estrade, S Ndoye… - Geophysical …, 2019 - Wiley Online Library
The northeastern Atlantic hosts the most ventilated subsurface waters of any eastern
boundary upwelling system, while coastal upwelling source waters are slightly above …