The authors in their work studied the deep-sea biodiversity of the Atlantic and Pacific oceans. Group
The researchers worked with sedimentaryrocks from depths ranging from 4,000 to more than 8,000 meters, then they cultivated and sequenced the genes of populations living exclusively at great depths, and carried out their molecular analysis.
More than 60% of the surface of our planet is occupied bythe bottom of oceans more than 1000 meters deep. This is the largest part of the biosphere. It has now become clear that completely different communities of organisms are found in different places on the ocean floor.
Among the organisms studied, mostoccupied by protists: their diversity significantly exceeded the diversity of multicellular animals. The authors were surprised by the high proportion of parasitic forms, from 10 to 20%, the presence of which scientists had not previously suspected. Such living creatures usually parasitized animals such as crustaceans or fish, but some even infected the simplest life forms.
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