Marine organisms accumulate osmolytes in response to stress and release them when environmental conditions change due to viral attack, grazing or change of salinity. These released osmolytes serve as essential nutrients for marine microorganisms.
Degradation of osmolytes by microorganisms is of great environmental importance as they release climate active gases into the atmosphere. Nitrogenous osmolytes also represent a significant pool of carbon, nitrogen and energy for marine microorganisms.
Currently there is very little understanding these processes in the Southern Ocean, even though it is a crucial component of the Earth’s climate system, and is an ideal region to study ocean-atmosphere connections because of its isolation from continental emissions and the strong circumpolar atmospheric circulation, rendering its air pristine.
NOSASSO will address this knowledge gap by participating in the Antarctic Circumnavigation Expedition, collecting samples and data around the entire Southern Ocean, to build an overall picture of the importance of these organic nitrogen compounds in the Southern Ocean.
This project has been completed
Project start date: February 2017
Project end date: January 2020
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Dr Ruth Airs
Dr Luca Polimene, Dr Rachael Beale , Dr Ruth Airs