The way that nutrients cycle through atmospheric, terrestrial, oceanic and associated biotic
reservoirs can constrain rates of biological production and help structure ecosystems on …

Trait-based approaches are increasingly used in ecology. Phytoplankton communities, with
a rich history as model systems in community ecology, are ideally suited for applying and …

The pelagic brown macroalgae Sargassum spp. have grown for centuries in oligotrophic
waters of the North Atlantic Ocean supported by natural nutrient sources, such as excretions …

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 …

The ocean's nitrogen cycle is driven by complex microbial transformations, including
nitrogen fixation, assimilation, nitrification, anammox and denitrification. Dinitrogen is the …

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 …

Mutualisms often define ecosystems, but they are susceptible to human activities.
Combining experiments, animal tracking, and mortality investigations, we show that 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 …

The marine nitrogen cycle is perhaps the most complex and therefore the most fascinating
among all biogeochemical cycles in the sea. As a limiting element for biological productivity …