A study published recently in Nature Ecology and Evolution has unveiled some of the key processes in marine microbial evolution. According to the study, led by the Uppsala University (Sweden) and with the participation of the Institut de Ciències del Mar (ICM-CSIC) of Barcelona, it is the large number of habitat transitions -from sea to land and vice versa- that have occurred in the last millions of years that explains the great current diversity.
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Source: Phys.org