Increased algal bloom probable in the future

Because of climate change, algal bloom might occur earlier in the season. And the Baltic Sea region may be particularly affected in the future.

‘The Baltic Sea is a sensitive area that is utilised by many people’, biologist Maria Karlberg says. ‘This makes the possible future impacts interesting to study.’

Maria and her research colleagues have investigated how increased carbon dioxide in the atmosphere, higher water temperatures and reduced salinity of the sea affect cyanobacteria and thereby algal bloom. The results showed that cyanobacteria have benefited from climate change compared with other groups of phytoplankton, such as diatoms and dinoflagellates. And increased growth of cyanobacteria means that algal bloom gets a boost.