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Natural Assemblages of Marine Proteobacteria and Members of the Cytophaga-Flavobacter Cluster Consuming Low- and High-Molecular-Weight Dissolved Organic Matter
ABSTRACT We used a method that combines microautoradiography with hybridization of fluorescent rRNA-targeted oligonucleotide probes to whole cells (MICRO-FISH) to test the hypothesis that theExpand
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The ecology of Cytophaga-Flavobacteria in aquatic environments.
  • D. Kirchman
  • Medicine, Biology
  • FEMS microbiology ecology
  • 1 February 2002
Culture-dependent and -independent studies have found that prokaryotic assemblages are quite diverse in aquatic habitats and contain representatives of virtually all of the roughly 40 divisions ofExpand
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Microbial production of recalcitrant dissolved organic matter: long-term carbon storage in the global ocean
The biological pump is a process whereby CO2 in the upper ocean is fixed by primary producers and transported to the deep ocean as sinking biogenic particles or as dissolved organic matter. The fateExpand
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Ecology of the rare microbial biosphere of the Arctic Ocean
Understanding the role of microbes in the oceans has focused on taxa that occur in high abundance; yet most of the marine microbial diversity is largely determined by a long tail of low-abundanceExpand
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Measuring bacterial biomass production and growth rates from leucine incorporation in natural aquatic environments
Publisher Summary An estimate of microbial production is used as a general index of microbial activity, and specifically, to calculate growth rates. Biomass production is used to obtain a first-orderExpand
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The oceanic gel phase: a bridge in the DOM-POM continuum
Recent discoveries reveal that polymer gel particles are abundant and important in the microbial loop, sedimentation processes, biogeochemical cycling, marine carbohydrate chemistry, and particleExpand
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Activity of abundant and rare bacteria in a coastal ocean
The surface layer of the oceans and other aquatic environments contains many bacteria that range in activity, from dormant cells to those with high rates of metabolism. However, little experimentalExpand
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Microbial growth in the polar oceans — role of temperature and potential impact of climate change
Heterotrophic bacteria are the most abundant organisms on the planet and dominate oceanic biogeochemical cycles, including that of carbon. Their role in polar waters has been enigmatic, however,Expand
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Contribution of SAR11 Bacteria to Dissolved Dimethylsulfoniopropionate and Amino Acid Uptake in the North Atlantic Ocean
ABSTRACT SAR11 bacteria are abundant in marine environments, often accounting for 35% of total prokaryotes in the surface ocean, but little is known about their involvement in marine biogeochemicalExpand
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The uptake of inorganic nutrients by heterotrophic bacteria
  • D. Kirchman
  • Biology, Medicine
  • Microbial Ecology
  • 1 September 1994
It is now well known that heterotrophic bacteria account for a large portion of total uptake of both phosphate (60% median) and ammonium (30% median) in freshwaters and marine environments. LessExpand
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