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

Biological dinitrogen (N2) fixation supplies nitrogen to the oceans, supporting primary
productivity, and is carried out by some bacteria and archaea referred to as diazotrophs …

Nitrogen fixation in the surface ocean impacts global marine nitrogen bioavailability and
thus microbial primary productivity. Until now, cyanobacterial populations have been viewed …

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) …

Sinking particles transport carbon and nutrients from the surface ocean into the deep sea
and are considered hot spots for bacterial diversity and activity. In the oligotrophic oceans …

Nitrogen (N) fixation is fueling planktonic production in a multitude of aquatic environments.
In meso-and poly-haline estuaries, however, the contribution of N by pelagic N2 fixation is …

In the present study, we report the nitrogen fixing potential of heterotrophic diazotrophs
isolated from a tropical estuary and adjacent coastal sea. Results of the study revealed that …

The ability to reduce atmospheric nitrogen (N2) to ammonia, known as N2 fixation, is a
widely distributed trait among prokaryotes that accounts for an essential input of new N to a …

Vitamin B1 (B1 herein) is a vital enzyme cofactor required by virtually all cells, including
bacterioplankton, which strongly influence aquatic biogeochemistry and productivity and …

Putative heterotrophic bacteria carrying out N2-fixation, so-called non-cyanobacterial
diazotrophs (NCDs), are widely distributed in marine waters, but details of how the O2 …