Results 181 to 190 of about 19,674 (204)
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Trends in Ecology & Evolution, 1993
We do not know how many bacterial species exist in the world, or in any particular environment, because bacteria cannot be differentiated under the microscope; we do not even know the right order of magnitude. Thus, up to a few years ago, discussions of bacterial diversity were unwarranted.
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We do not know how many bacterial species exist in the world, or in any particular environment, because bacteria cannot be differentiated under the microscope; we do not even know the right order of magnitude. Thus, up to a few years ago, discussions of bacterial diversity were unwarranted.
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SAR11 clade dominates ocean surface bacterioplankton communities
Nature, 2002The most abundant class of bacterial ribosomal RNA genes detected in seawater DNA by gene cloning belongs to SAR11-an alpha-proteobacterial clade. Other than indications of their prevalence in seawater, little is known about these organisms. Here we report quantitative measurements of the cellular abundance of the SAR11 clade in northwestern Sargasso ...
Robert M, Morris +6 more
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Temporal variability of bacterioplankton is habitat driven
Molecular Ecology, 2018AbstractTemporal dynamics of bacterioplankton are rarely investigated for multiple habitats and years within individual lakes, limiting our understanding of the variability of bacterioplankton community (BC) composition with respect to environmental factors.
Obertegger U. +4 more
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Lake bacterioplankton dynamics over diurnal timescales
Freshwater Biology, 2016Summary Planktonic bacterial community dynamics over short timescales can be of great importance for food webs and ecosystem functioning but are rarely described when microbial community and composition are assessed. To study the significance of such dynamics we sampled the surface water at the deepest point of a mesotrophic lake (Lake Erken, Sweden)
Grubisic, Lorena M. +9 more
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Annual study of bacterioplankton community dynamics
Limnology and Oceanography, 1991Bacterial growth, abundance, and grazing were measured simultaneously during a full seasonal cycle in a temperate brackish water estuary, covering diel and seasonal variability. Growth of bacteria was balanced by bacterivory on an annual basis, and observed net change in bacterial numbers matched the net change calculated by a simple Lotka‐Volterra ...
J. Wikner, Å. Hagström
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Oceanic fronts: transition zones for bacterioplankton community composition
Environmental Microbiology Reports, 2016Summary Oceanic fronts are widespread mesoscale features that exist in the boundary between different water masses. Despite the recognized importance of bacterioplankton (including bacteria and archaea) on the marine biogeochemical cycles and the ubiquitousness of fronts, the effect of frontal zones on the ...
Federico Baltar +4 more
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Bacterioplankton of the Kara Sea shelf
Oceanology, 2015The principal zones of the Kara Sea shelf are distinguished on the basis of structural and functional characteristics of bacterioplankton. Estuarine regions are characterized by elevated bacterial abundance and production rates, while the adjacent shelf has high abundance but lower production values. The southwestern part of the Kara Sea has relatively
N. D. Romanova, A. F. Sazhin
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Evidence of biogeography in surface ocean bacterioplankton assemblages
Marine Genomics, 2008Regardless of the importance of bacterial assemblages as essential components of ecosystems, little is known about how their populations are structured. We analyzed the composition and turnover rates, based on 16S rDNA sequences, of surface water oceanic bacterial assemblages of the fraction between 0.1 and 0.8 μm along a latitudinal gradient (45°6'42''
Luisa I, Falcón +4 more
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Cultivation of the ubiquitous SAR11 marine bacterioplankton clade
Nature, 2002The alpha-proteobacterial lineage that contains SAR11 and related ribosomal RNA gene clones was among the first groups of organisms to be identified when cultivation-independent approaches based on rRNA gene cloning and sequencing were applied to survey microbial diversity in natural ecosystems.
Michael S, Rappé +3 more
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