The Evolution of Small Bacterial Genomesin the Ultra-Oligotrophic Ocean

submitted by: dougramsey
The size and coding capacity of a genome are its most fundamental properties. What selective pressures deter mine the expansion and contraction of genomes, and how is genome size related to adaptive strategies? Very small marine microbial genomes are providing new insights into these questions. The first reports of genome sequences from the cyanobacterium Prochlorococcus and the α-proteo bacterium SAR11 (Pelagibacter) established that these very abundant marine bacterioplankton clades have...

New Sequencing Technologies at JGI and Applications in Bioenergy Research

submitted by: dougramsey
The US DOE Joint Genome Institute (JGI) is a high throughput sequencing and genomic research center involved in a myriad of sequencing projects. JGI’s major effort is the sequencing of genomes and transcriptomes of plants, microbes and environmental metagenomic samples of relevance to the DOE missions of carbon sequestration, bioremediation and energy production. Roche/454’s platform utilizes emulsion PCR for template amplification and pyrosequencing technology on high well-density...

Comparative Metagenomics

submitted by: dougramsey
Each metagenome study of a complex habitat is accompanied by lots of unknowns as so far the depth of sequencing is usually insufficient to reveal the entire microbial community of an ecosystem. The probably easiest way of extracting meaningful information is the comparison with existing data, analogous to that of genome comparisons. However, the complexity within the analysis chain of a single metagenome annotation is topped by the difficulties that the integration of heterogeneously...

SDSU Geological Sciences Webinar - Kathleen R. Johnson

submitted by: tcarrasc
Reconstructing Asian Monsoon History from Chinese Speleothems; Kathleen R. Johnson, Department of Earth System Science, University of California, Irvine: While we know that modern anthropogenic climate change is superimposed upon significant natural climate variability, the instrumental record of climate is too short to capture the full range of this variability. In order to fully understand and predict future changes, therefore, high-resolution, welldated paleoclimate records are needed to...

A Step Ahead of the Next 'Big One'

From detection to warning, Scripps researchers are helping preparations for Earth's most elusive natural hazard