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Marine microbes teem with diversity; metagenomics reshapes understanding of species
Summary
A university seminar described how metagenomics and comparative genomics reveal vast, previously unseen microbial diversity in marine and other environments, challenging traditional species definitions and yielding new biomedical leads.
Speaker 3, Lecturer, told an audience at a university seminar that modern sequencing approaches are revealing vast microbial diversity in marine environments and changing how scientists define species. “If you were to take a single sample of seawater, you'll find that it is comprised of large populations of microorganisms, very few of which we have been able to culture,” Speaker 3 said, adding that “about 1 percent of the species that are present in a given teaspoon of water are cultured and described.”
The lecturer said metagenomics — sequencing DNA from whole environmental samples rather than from cultured isolates — now allows researchers to identify organisms and analyze population structure across depths and…
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