Low oxygen conditions have already been reported for various aquatic systems, from lakes, estuaries and coastal areas to off-shore regions of the World Ocean, where water ventilation is not able to renew the oxygen consumed by degradation of organic matter.
In the coastal ocean, dead zones have spread exponentially since the 1960s and have been reported for more than 400 systems. In the coming decades and centuries, it is foreseen that deoxygenation will increasingly stress aquatic ecosystems in a way that is currently ignored on the global scale, but admitted as only local problems.
The 46th Liege colloquium, "Low oxygen environments in marine, estuarine and fresh waters", will investigate new developments and insights related to the critical problem of ocean deoxygenation, low oxygen zones in marine and freshwater systems.
Further information can be found here.