Algal virus boosts nitrogen uptake in the ocean

Ocean science. Ironing out algal issues in the Southern Ocean.

Krill Excretion Boosts Microbial Activity in the Southern Ocean

Antarctic krill are known to release large amounts of inorganic and organic nutrients to the water column. Here we test the role of krill excretion of dissolved products in stimulating heterotrophic bacteria on the basis of three experiments where ammonium and organic excretory products released by krill were added to bacterial assemblages, free of grazers. Our results demonstrate that the addi...

A geographical and seasonal comparison of nitrogen uptake by phytoplankton in the Southern Ocean

The impact of light and nutrients (such as silicate and iron) availability on nitrogen uptake and primary production vary seasonally and regionally in the Southern Ocean. The seasonal cycle of nitrogen uptake by phytoplankton in the Southern Ocean is not fully resolved over an annual scale due to the lack of winter in situ measurements. In this study, nitrate and ammonium uptake rates were meas...

Nitrogen ccycling in the Southern Ocean

Introduction Conclusions References

Nitrogen fixation in the Southern Ocean

Introduction Conclusions References