The Ecological Role of Water-Column Microbes in the Sea*
TLDR
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.Abstract:
Recently developed techniques for estimating bacterial biomass and productivity indicate that bacterial biomass in the sea is related to phytoplankton concentration and that bacteria utilise 10 to 50 % of carbon fixed by photosynthesis. 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. The flagellates in turn are preyed upon by microzooplankton. Heterotrophic flagellates and microzooplankton cover the same size range as the phytoplankton, thus providing the means for returning some energy from the 'microbial loop' to the conventional planktonic food chain.read more
Citations
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Journal ArticleDOI
Biogeochemical controls and feedbacks on ocean primary production
TL;DR: Elucidating the biogeochemical controls and feedbacks on primary production is essential to understanding how oceanic biota responded to and affected natural climatic variability in the geological past, and will respond to anthropogenically influenced changes in coming decades.
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Marine viruses and their biogeochemical and ecological effects
TL;DR: Newly developed fluorescence and molecular techniques leave the field poised to make significant advances towards evaluating and quantifying viruses' effects on biogeochemical and ecological processes.
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Virioplankton: viruses in aquatic ecosystems
KE Wommack,Rita R. Colwell +1 more
TL;DR: Novel applications of molecular genetic techniques have provided good evidence that viral infection can significantly influence the composition and diversity of aquatic microbial communities, supporting the hypothesis that viruses play a significant role in microbial food webs.
Book
The Ecology of Phytoplankton
TL;DR: Reynolds as discussed by the authors provides basic information on composition, morphology and physiology of the main phyletic groups represented in marine and freshwater systems and reviews recent advances in community ecology, developing an appreciation of assembly processes, co-existence and competition, disturbance and diversity.
Journal ArticleDOI
Protein content and protein synthesis rates of planktonic marine bacteria
Meinhard Simon,Farooq Azam +1 more
TL;DR: Bacterial protein production method was an order of magnitude more sensitive and yielded bacterial carbon production directly without the need to know the cell size of the part of the assemblage in growth state.
References
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Journal ArticleDOI
The use of DAPI for identifying and counting aquatic microflora1
Karen G. Porter,Yvette S. Feig +1 more
TL;DR: Use of DAPI improved visualization and counting of <1-µm bacteria and blue-green algae in seston-rich samples and extended sample storage to at least 24 weeks.
UseofNuclepore Filters forCounting Bacteria by Fluorescence Microscopy
TL;DR: Polycarbonate Nuclepore filters are better than cellulose filters for the direct counting of bacteria because they have uniform pore size and a flat surface that retains all of the bacteria on top of the filter.
Journal ArticleDOI
Use of nuclepore filters for counting bacteria by fluorescence microscopy.
TL;DR: Polycarbonate Nuclepore filters are better than cellulose filters for the direct counting of bacteria because they have uniform pore size and a flat surface that retains all of the bacteria on top of the filter.
Journal ArticleDOI
Thymidine incorporation as a measure of heterotrophic bacterioplankton production in marine surface waters : Evaluation and field results
Jed A. Fuhrman,Farooq Azam +1 more
TL;DR: To assess bacterioplankton production in the sea, a procedure for measuring growth based on incorporation of tritiated thymidine into DNA is developed; the accuracy of this procedure was tested under a variety of laboratory and field conditions.
Journal ArticleDOI
The Size Distribution of Particles in the OCEAN1
TL;DR: In this paper, the frequency distributions of particIe size between sizes of about I and 100 p are given for both surface and deep water of the Atlantic and Pacific Oceans.
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