The purpose of the 46th International Liege Colloquium organized in May 2014 on "Low Oxygen Environments in marine, fresh and estuarine waters" was to generate an overview of the current knowledge on deoxygenation, its monitoring, modelling, impact on ecosystems and biogeochemical cycles as well as the potential evolution of low oxygen conditions in a changing climate (http://modb.oce.ulg.ac.be/?page=colloquium&year=2014). Thematic sessions have been organized on the following:
- 1. deoxygenation, marine resources, ecosystem functioning and structure of the food web;
- 2. deoxygenation and biogeochemical cycles;
- 3. life and processes in redox gradients;
- 4. palaeoproxies of hypoxia;
- 5. modelling hypoxia;
- 6. oxygen time series and instrumental developments;
- 7. eastern boundary upwelling systems (EBUS) as natural SOLAS laboratories;
- 8. deoxygenation in a global change context.