The surface water of the marine environment has traditionally been viewed as a nitrogen (N)
limited habitat, and this has guided the development of conceptual biogeochemical models …

We establish the fixed nitrogen budget of the Pacific Ocean based on nutrient fields from the
recently completed World Ocean Circulation Experiment (WOCE). The budget includes …

BACKGROUND Biological dinitrogen (N2) fixation, the reduction of atmospheric N2 to
ammonia, is important for maintaining the fertility of the oceans by providing biologically …

The nitrogen input through biological N 2 fixation is essential for life in vast areas of the
global ocean. The belief is that cyanobacteria are the only relevant N 2-fixing (diazotrophic) …

Nitrogen (N) is a key element for life in the oceans. It controls primary productivity in many
parts of the global ocean, consequently playing a crucial role in the uptake of atmospheric …

The dominant process adding nitrogen (N) to the ocean, di-nitrogen (N2) fixation, is
mediated by prokaryotes (diazotrophs) sensitive to a variety of environmental factors. In …

Marine N2 fixation supports a significant portion of oceanic primary production by making N2
bioavailable to planktonic communities, in the process influencing atmosphere-ocean …

Oceanic fixed-nitrogen concentrations are controlled by the balance between nitrogen
fixation and denitrification,,,. A number of factors, including iron limitation,,, can restrict …

Dinitrogen (N2) fixation can alleviate N limitation of primary productivity by introducing fixed
nitrogen (N) to the world's oceans. Although measurements of pelagic marine N2 fixation are …

Nitrogen fixation supports new production in the oligotrophic oceans and removes
dinitrogen and carbon dioxide from mixed layer waters. N‐fixation rates have been …