Diatoms sustain the marine food web and contribute to the export of carbon from the surface
ocean to depth. They account for about 40% of marine primary productivity and particulate …

Marine diatoms rose to prominence about 100 million years ago and today generate most of
the organic matter that serves as food for life in the sea. They exist in a dilute world where …

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 …

Discrepancies between estimates of oceanic N 2 fixation and nitrogen (N) losses through
denitrification have focused research on identifying N 2-fixing cyanobacteria and quantifying …

This review summarizes recent aspects of (di) nitrogen fixation and (di) hydrogen
metabolism, with emphasis on cyanobacteria. These organisms possess several types of the …

Many diatoms that inhabit low-nutrient waters of the open ocean live in close association
with cyanobacteria. Some of these associations are believed to be mutualistic, where N2 …

High and changing salt concentrations represent major abiotic factors limiting the growth of
microorganisms. During their long evolution, cyanobacteria have adapted to aquatic habitats …

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 …

The marine nitrogen (N) cycle controls the productivity of the oceans. This cycle is driven by
complex biogeochemical transformations, including nitrogen fixation, denitrification, and …

Many marine organisms have coevolved symbiotic relationships with nitrogen-fixing bacteria
in nitrogen limited environments such as coral reefs. In addition, some of these organisms …