The dead zones in our oceans are spreading, according to new research

Research by the University of Gothenburg shows that more than 400 marine zones around the world has such "a great lack of oxygen in soft seabeds that fauna and fish have been harmed." The research made by the Swedish University also shows that the dead soft seabeds have doubled every decade since the 60's.

Back in 1995 Rutger Rosenberg, from the Department of Marine Ecology, University of Gothenburg, and Robert Diaz, from the Virginia Institute of Marine Science in the USA, carried out research and studies on the world's soft seabeds. Their research then showed 44 zones "that were so afflicted by oxygen deficiency that soft-seabed fauna and fish had been harmed."

Now, nearly 13 years after that research the numbers of dead zones have risen to more than 400. These latest findings, which have been presented in the latest issue of the magazine Science, draw the conclusion that this is "the most serious threat to the health of the sea" and that it is and will affect important fishing areas.

The dead zones together are "at least" 245,000 square kilometres big, or equal to the size of Great Britain. The worst places hit are the Baltic Sea in northern Europe, the Gulf of Mexico and the East China Sea.

Image credit: txd. Image licensed under a Creative-Commons Attribution license.