Native (flat) oyster (Ostrea edulis) beds, once a major component of the North Sea, largely disappeared from the region in the late 19th century. Flat oyster restoration is taking place at a number of locations in the North Sea. When flat oyster beds are restored in areas where O. edulis is functionally …

Waterborne diseases are posing a constant threat for people. In developing countries there is a lack of microbiologically safe drinking water and in the developed countries there are occasional waterborne disease outbreaks. These diseases are caused by bacteria or parasites which can be found in various …