Regulation of Oceanic Silicon and Carbon Preservation by Temperature Control on Bacteria

  title={Regulation of Oceanic Silicon and Carbon Preservation by Temperature Control on Bacteria},
  author={Kay D. Bidle and Maura Manganelli and Farooq Azam},
  pages={1980 - 1984}
We demonstrated in laboratory experiments that temperature control of marine bacteria action on diatoms strongly influences the coupling of biogenic silica and organic carbon preservation. Low temperature intensified the selective regeneration of organic matter by marine bacteria as the silicon:carbon preservation ratio gradually increased from ∼1 at 33°C to ∼6 at –1.8°C. Temperature control of bacteria-mediated selective preservation of silicon versus carbon should help to interpret and model… 
Causes and biogeochemical implications of regional differences in silicification of marine diatoms
It is suggested that ecological processes may cause much larger systematic regional and temporal differences in cellular stoichiometry than is currently accommodated by ecosystem models.
The life of diatoms in the world's oceans
Marine diatoms rose to prominence about 100 million years ago and today generate most of the organic matter that serves as food for life in the sea. They exist in a dilute world where compounds
Prokaryotic Response to Phytodetritus-Derived Organic Material in Epi- and Mesopelagic Antarctic Waters
The results showed that several rare or undetected taxa in the initial community became dominant during the time course of the incubations and that different phytodetritus-derived organic matter sources induced specific changes in microbial communities, selecting for peculiar degradation and utilization processes spectra.
Si and C interactions in the world ocean: Importance of ecological processes and implications for the role of diatoms in the biological pump
It is demonstrated that statistical analyses performed at global scales hide spatial variability in carrying coefficients, indicating a clear need to understand the mechanisms that control spatial and temporal variations in the relative importance of ballast minerals and other export mechanisms such as particle dynamics.
Microbial Ecology and Biogeochemical Processes in the Ulleung Basin
Since heterotrophic bacteria rapidly respond to variations in physico-chemical conditions, monitoring the role of bacteria in C cycles is important in the East Sea where has been known as the rapid
Introduction to special section: The Role of Diatom Production and Si Flux and Burial in the Regulation of Global Cycles
[1] The present GBC special section arose from an American Geophysical Union Chapman Conference held 22–26 September 2003 on the Greek Island of Paros. Studies of the cycling of the major nutrients
Increasing Hydrostatic Pressure Impacts the Prokaryotic Diversity during Emiliania huxleyi Aggregates Degradation
In the dark ocean, the balance between the heterotrophic carbon demand and the supply of sinking carbon through the biological carbon pump remains poorly constrained. In situ tracking of the dynamics
Biosilicification Drives a Decline of Dissolved Si in the Oceans through Geologic Time
Biosilicification has driven variation in the global Si cycle over geologic time. The evolution of different eukaryotic lineages that convert dissolved Si (DSi) into mineralized structures (higher


The Ecological Role of Water-Column Microbes in the Sea*
Evidence is presented to suggest that numbers of free bacteria are controlled by nanoplankton~c heterotrophic flagellates which are ubiquitous in the marine water column, thus providing the means for returning some energy from the 'microbial loop' to the conventional planktonic food chain.
Bacterial ectoenzymes in marine waters : activity ratios and temperature responses in three oceanographic provinces
It is found that relative activities of leucine aminopeptidase and P-glucosidase in seawater varied significantly among three oceanic regions: the subtropical North Pacific, the equatorial Pacific, and the Southern Ocean.
Influence of iron availability on nutrient consumption ratio of diatoms in oceanic waters
The major nutrients (nitrate, phosphate and silicate) needed for phytoplankton growth are abundant in the surface waters of the subarctic Pacific, equatorial Pacific and Southern oceans, but this
Temperature and substrates as interactive limiting factors for marine heterotrophic bacteria
In temperate ocean surface waters and estuarine waters, growth and respiration may be increased experimentally either by raising the temperature or by increasing organic substrate concentrations, providing indirect evidence that the lim- itation is an effect of temperature on substrate uptake or assimilation.
Silicate regulation of new production in the equatorial Pacific upwelling
Surface waters of the eastern equatorial Pacific Ocean present the enigma of apparently high plant-nutrient concentrations but low phytoplankton biomass and productivity. One explanation for this
Accelerated dissolution of diatom silica by marine bacterial assemblages
Bacteria-mediated silicon regeneration rates varied with diatom type and bacterial assemblage; observed rates could explain most of the reported upper-ocean silicon regeneration.
Silica production and the contribution of diatoms to new and primary production in the central North Pacific
The silica cycle in the upper 200 m of the central North Pacific was examined to further assess the role of oligotrophic mid-ocean gyres in the global marine silica cycle and to evaluate the role of
Temperature Regulation of Bacterial Activity During the Spring Bloom in Newfoundland Coastal Waters
While the spring phytoplankton bloom in Newfoundland coastal waters is in progress during April and May, at water temperatures between -1� and +2�C, bacterial growth and respiratory rates remain low.
Particulate organic carbon flux in the oceans—surface productivity and oxygen utilization
Organic detritus passing from the sea surface through the water column to the sea floor controls nutrient regeneration, fuels benthic life and affects burial of organic carbon in the sediment