Possible influence of bacterial quorum sensing on the hydrolysis of sinking particulate organic carbon in marine environments

Quorum sensing control of phosphorus acquisition in Trichodesmium consortia.

Composition and fate of gas and oil released to the water column during the Deepwater Horizon spill.

Rapid microbial respiration of Deepwater Horizon oil in surface waters of the Gulf of Mexico

Microbial sources of intact polar diacylglycerolipids in the western North Atlantic Ocean

Phosphorus supply drives rapid turnover of membrane phospholipids in the diatom Thalassiosira pseudonanna.

Bacterial and eukaryotic intact polar lipids in the eastern subtropical South Pacific: water-column distribution, planktonic sources, and fatty acid composition.

Abundance and diversity of heterotrophic bacterial cells assimilating 33P-phosphate in the subtropical North Atlantic Ocean

Tracking hydrocarbon plume transport and biodegradation at Deepwater Horizon

Viral glycosphingolipids induce lytic infection and cell death in marine phytoplankton

Kinetic constraints on acylated homoserine lactone-based quorum sensing in marine environments

Phytoplankton in the ocean substitute lipids in response to phosphorus scarcity

An interlaboratory study of TEX86 and BIT analysis using high-performance liquid chromatography-mass spectrometry

Assessing nutrient limitation of Prochlorococcus in the North Pacific subtropical gyre by using an RNA capture method

Phospholipid synthesis rates in the eastern subtropical South Pacific Ocean

Barium in twilight zone suspended matter as a proxy for particulate organic carbon mineralization: Results for the North Pacific

Primary, new and export production in the NW Pacific Subarctic Gyre during the VERTIGO K2 experiments

Microbial vs. zooplankton control of sinking particle flux in the ocean's twilight zone

Phosphate availability: ultimate control of new nitrogen input by nitrogen fixation in the tropical Pacific Ocean

Growth and P-specific uptake rates of bacterial and phytoplanktonic communities in the Southeast Pacific (BISOSOPE cruise)

Microbes and the marine phosphorus cycle.

Revisiting carbon flux through the ocean's twilight zone.

Sulfolipids dramatically decrease phosphorus demand by picocyanobacteria in oligotrophic marine environments.

Quantifying 3H-thymidine incorporation rates by a phylogenetically defined group of marine planktonic bacteria (Bacteriodetes phylum).

Relationships between bacterial community structure, light, and carbon cycling in the eastern subarctic North Pacific

Impact of suboxia on sinking particulate organic carbon: Enhanced carbon flux and preferential degradation of amino acids via denitrification

Seasonal variation in sedimentary amino acids and the association of organic matter with mineral surfaces in a sandy eelgrass meadow

Evidence of tight coupling between bacteria and particulate organic carbon during seasonal stratification of Lake Michigan.

Microbiological, molecular biological and stable isotope evidence for nitrogen fixation in the open waters of Lake Michigan

General Interest Articles

Abundance and diversity of heterotrophic bacterial cells assimilating 33P-phosphate in the subtropical North Atlantic Ocean

Longnecker K., Lomas M. W., and Van Mooy B. A. S.

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Relative abundance of DAPI-stained cells associated with silver grains. Data are the average of surface water samples from Cruise 1, Cruise 2 and Cruise 3; the error bars are standard errors. The letters indicate data that were not significantly different when post hoc comparisons were separately made for each cruise.

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» Full text of article can be found here.

Environ. Microbiol.12: 2773-2782 (2010)

Abstract
Microorganisms play key roles in the cycles of carbon and nutrients in the ocean, and identifying the extent to which specific taxa contribute to these cycles will establish their ecological function. We examined the use of ³³P-phosphate to identify heterotrophic bacteria actively involved in the cycling of phosphate, an essential inorganic nutrient. Seawater from the sub-tropical North Atlantic Ocean was incubated with ³³P-phosphate and analysed by microautoradiography to determine the proportion and diversity of the bacterial community-assimilating phosphate. Complementary incubations using ³H-leucine and ³H-thymidine were also conducted. We found that a higher proportion of total heterotrophic bacterial cells in surface water samples assimilated phosphate compared with leucine or thymidine. Bacteria from all of the phylogenetic groups we identified by CARD-FISH were able to assimilate phosphate, although the abundances of cells within each group did not scale directly with the number found to assimilate phosphate. Furthermore, a significantly higher proportion of Alphaproteobacteria, Gammaproteobacteria and Cytophaga-like cells assimilated phosphate compared with leucine or thymidine. Our results suggest that a greater proportion of bacterial cells in surface waters are actively participating in the biogeochemical cycling of phosphorus, and possibly other elements, than is currently estimated through the use of ³H-leucine or ³H-thymidine.

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