The Baltic Sea Bed

The Baltic Sea bottom has changed over time to consist of less detrital-rich sediment to more organic-rich sediment. This is partly due to increased eutrophication, which in turn has resulted in low levels of oxygen in deep waters.

There are different types of areas on the bottom. Some areas are called 'erosion bottoms' where sediment material only 'passes' the seabed to finally settle in areas called 'accumulation bottoms'. The way sediments move has to do with currents, bottom topography and other variations. Therefore, by looking at the sediments on the seabed, you can learn a lot about the sea and its history.

This information is taken from The Baltic Sea Portal, click here to learn more: http://www.fimr.fi/en/tietoa/merenpohja/en_GB/sedimentit/

Here is an example of the animal race adapting to survive in these harsh conditions: