This article outlines the isotope systematics of the major processes in the ocean nitrogen (N) cycle, their impact on the isotopic compositions of the major N reservoirs in the ocean, and how the N isotopes in the modern ocean and sedimentary record may record current N fluxes and past ...
Biogeochemistry Nitrogen cycle processes in low-oxygen marine environments PRINCETON UNIVERSITY Bess B. Ward Newell BulorSilvia ElenaNitrogen is the limiting nutrient in most of the surface ocean, and understanding the fate and supply of nitrogen in the marine system has been the subject of extensive...
Earth. Furthermore, the oceanic cycles of carbon, nitrogen, and phosphorus are inextricably linked together through the production andremineralizationof organic matter, especiallynear surfaceoceanphytoplanktonproduction. This coordinated web of major bioelements can be viewed as the nutrient ‘super-cycle....
The ocean is home to a diverse and metabolically versatile microbial community that performs the complex biochemical transformations that drive the nitrogen cycle, including nitrogen fixation, assimilation, nitrification and nitrogen loss processes. In this Review, we discuss the wealth of new ocean nitro...
Nitrogen (N2) fixation in oligotrophic surface waters is the main source of new nitrogen to the ocean1 and has a key role in fuelling the biological carbon pump2. Oceanic N2 fixation has been attributed almost exclusively to cyanobacteria, even though ge
we deeply-sequenced relatively quantitative viral particle metagenomes from the surface to OMZ waters of the Eastern Tropical South Pacific (ETSP) Ocean. Several N-cycle AMGs were identified, enabling us to contemplate the functional implications of viral reprogramming in relation to OMZ biogeochemistry...
( 2006 ), The role of air-sea exchange in the marine nitrogen cycle , Biogeosciences , 3 ( 3 ), 271 – 280 , doi: 10.5194/bg-3-271-2006 .Jickells, T., 2006. The role of air-sea exchange in the marine nitrogen cycle. Biogeosci. Discuss. 3, 183-210....
in the atmosphere that had wide ranging effects on ecosystems globally. Here, we present stable nitrogen isotope data from the Eastern Peri-Tethys Ocean that record a significant transition in the nitrogen cycle. At the initiation of the PETM, the nitrogen isotopic composition of sediments decreased...
Plankton Production and the Nitrate Nitrogen and Phosphate Cycles in the Pacific Ocean off New South WalesRECENT quantitative research into the production of plankton and more especially into the seasonal cycle of plankton production has been accompanied by a keen appreciation of more accurate chemical ...
More than 50 scientists from 12 different countries convened with a unique set of goals: an integrated and comprehensive estimate of the current nitrogen cycle of the ocean, coastal systems, and contributing watersheds of the North Atlantic region; an analysis of human-induced changes to those ...