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 …

Vast expanses of oxygen-deficient and nitrite-rich water define the major oxygen minimum
zones (OMZs) of the global ocean. They support diverse microbial communities that …

This paper contrasts the natural and anthropogenic controls on the conversion of unreactive
N 2 to more reactive forms of nitrogen (Nr). A variety of data sets are used to construct global …

Biological N2 fixation is an important part of the marine nitrogen cycle as it provides a source
of new nitrogen that can support biological carbon export and sequestration. Research in …

Blooms of autotrophic algae and some heterotrophic protists are increasingly frequent in
coastal waters around the world and are collectively grouped as harmful algal blooms …

Marine N 2 fixing microorganisms, termed diazotrophs, are a key functional group in marine
pelagic ecosystems. The biological fixation of dinitrogen (N 2) to bioavailable nitrogen …

A global marine ecosystem mixed-layer model is used to study iron cycling and nutrient-
limitation patterns in surface waters of the world ocean. The ecosystem model has a small …

The broad distribution and often high densities of the cyanobacterium Trichodesmium spp.
in oligotrophic waters imply a substantial role for this one taxon in the oceanic N cycle of the …

The last several decades have witnessed dramatic advances in unfolding the diversity and
commonality of oceanic diazotrophs and their N2-fixing potential. More recently, substantial …

Since the first edition of Nitrogen in the Environment published in 1983, it has been
recognized as the standard in the field. In the time since the book first appeared, there has …