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Molecular ecology and metagenomics applied to the study of microbial biodiversity are changing our comprehension of the biosphere. An impressive diversity of archaea, bacteria and, more recently, protists has been uncovered by molecular tools. Efforts to couple function to the phylogenetic diversity observed in natural environments are leading to the discovery of novel metabolisms and to a re-evaluation...
In spite of the great success of small-subunit ribosomal RNA (SSU rRNA)-based studies for the analysis of environmental prokaryotic diversity, this molecular approach has seldom been applied to microbial eukaryotes. Recent molecular surveys of the smallest eukaryotic planktonic fractions at different oceanic surface regions and in deep-sea Antarctic samples revealed an astonishing protist diversity...
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