Nitrogen Isotopes in the Ocean - Encyclopedia of Ocean SciencesELSEVIEREncyclopedia of Ocean Sciences
Nitrogen (N2) fixation in oligotrophic surface waters is the main source of new nitrogen to the ocean1and has a key role in fuelling the biological carbon pump2. Oceanic N2fixation has been attributed almost exclusively to cyanobacteria, even though genes encoding nitrogenase, the enzyme that fix...
Tyrrell developed a simple two-box model of oceanic nitrogen and phosphorus cycles to describe the regulation of both nitrate and phosphate concentrations in the global ocean. His criterion for nitrate deficit in the ocean, a molar ratio of N:P in surface waters (R) of less than 16, is ...
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 change...
Although the Arctic Ocean is the most riverine-influenced of all of the world’s oceans, the importance of terrigenous nutrients in this environment is poorly understood. This study couples estimates of circumpolar riverine nutrient fluxes from the PARTNERS (Pan-Arctic River Transport of Nutrients, ...
The widespread occurrence of nitrogen limitation to net primary production in terrestrial and marine ecosystems is something of a puzzle; it would seem tha
The North Atlantic Ocean and its contributing watersheds constitute a region which has seen perhaps the greatest increase in anthropogenically-derived nitrogen. In May of 1994, the International Scope Nitrogen Project, with funding from the Andrew Mellon Foundation, the United Nations Environment Program...
当当中华商务进口图书旗舰店在线销售正版《海外直订Nitrogen Cycling in the North Atlantic Ocean and Its Watersheds: Report of the International ...》。最新《海外直订Nitrogen Cycling in the North Atlantic Ocean and Its Watersheds: Report of the International
Microbial dinitrogen (N2) fixation, the nitrogenase enzyme-catalysed reduction of N2 gas into biologically available ammonia, is the main source of new nitrogen (N) in the ocean. For more than 50 years, oceanic N2 fixation has mainly been attributed to the activity of the colonial cyanobacteri...
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 ...