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Unexpected diversity of small eukaryotes in deep-sea Antarctic plankton
TLDR
Using ribosomal RNA genes from marine picoplankton, several new groups of bacteria and archaea have been identified, some of which are abundant and related to dinoflagellates that are found at all studied depths and suggest a radiation early in the evolution of alveolates.
Numerical Taxonomy of Moderately Halophilic Gram-negative Rods
TLDR
A large number of the strains could be tentatively assigned to the genus Vibrio, suggesting that this may be an abundant taxon of moderately halophilic Gram-negative rods in solar salterns.
Salinibacter ruber gen. nov., sp. nov., a novel, extremely halophilic member of the Bacteria from saltern crystallizer ponds.
TLDR
Isolation of a bacterium from the natural environment that, although being a major component of the community, was previously known by its phylotype only is succeeded, allowing formal description of a novel genus and species.
Prokaryotic genetic diversity throughout the salinity gradient of a coastal solar saltern.
TLDR
Water samples from eight ponds were analysed, covering a salinity range from near sea water to saturated sodium chloride, and both Bacteria and Archaea showed the same pattern; as salinity increased, the number of different clusters decreased, and only one cluster became dominant.
Development of a Multilocus Sequence Typing Scheme for Characterization of Clinical Isolates of Acinetobacter baumannii
TLDR
The MLST scheme provides a high level of resolution and an excellent tool for studying the population structure and long-term epidemiology of A. baumannii.
The genome of the square archaeon Haloquadratum walsbyi : life at the limits of water activity
TLDR
Although no direct genetic indication was found that can explain how this peculiar organism retains its square shape, the genome revealed several unique adaptive traits that allow this organism to thrive in its specific and extreme niche.
Metagenomics of the Deep Mediterranean, a Warm Bathypelagic Habitat
TLDR
The comparison of metagenomic libraries from the deep Mediterranean and the Pacific ALOHA water column showed that bathypelagic Mediterranean communities resemble more mesopelagic communities in the Pacific, and suggests that, in the absence of light, temperature is a major stratifying factor in the oceanic water column, overriding pressure at least over 4000 m deep.
The genome of Salinibacter ruber: convergence and gene exchange among hyperhalophilic bacteria and archaea.
TLDR
The phenotype of S. ruber is remarkably similar to that of the hyperhalophilic Archaea (Haloarchaea), and the genome sequence suggests that this resemblance has arisen through convergence at the physiological level and the molecular level.
Explaining microbial population genomics through phage predation
TLDR
This work proposes the constant-diversity dynamics model, in which the diversity of prokaryotic populations is preserved by phage predation, and provides supporting evidence for this model from metagenomics, mathematical analysis and computer simulations.
Haloquadratum walsbyi gen. nov., sp. nov., the square haloarchaeon of Walsby, isolated from saltern crystallizers in Australia and Spain.
TLDR
The phenotypic characterization and phylogenetic data support the placement of isolates C23T and HBSQ001 in a novel species in a new genus within the Halobacteriaceae, for which the name Haloquadratum walsbyi is proposed.
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