S. J. Giovannoni

The paper compares methods for determining phytoplankton community composition, finding strong correlations for some taxa but not others, and highlights implications for ocean color remote sensing.

This study successfully cultivates SAR202 bacteria, revealing their slow growth, light inhibition, and metabolic capabilities involving multiple catabolic pathways.

The paper proposes the Hypoxic Barrier Hypothesis to explain why ocean oxygen levels remain higher than expected despite microbial respiration, finding a large variation in oxygen affinity among enzymes.

The paper shows SAR11 bacteria transport and metabolize multiple polyamines using multifunctional enzymes, supporting the hypothesis that enzyme versatility enables streamlined genomes to utilize a wide range of dissolved organic matter.

The paper identifies heme auxotrophy in the acI bacterial lineage and shows it is widespread in uncultivated microbial groups, suggesting heme could enhance microbial culture diversity.

This study identifies 11 new pelagiphages in the Podoviridae family that integrate into host SAR11 genomes, providing evidence of both lytic and lysogenic infection mechanisms.