Paraphysomonas imperforata (Protista, Chrysomonadida) under different turbulence levels: feeding, physiology and energetics

@article{Peters1996ParaphysomonasI,
  title={Paraphysomonas imperforata (Protista, Chrysomonadida) under different turbulence levels: feeding, physiology and energetics},
  author={Francesc Peters and Joon-Won Choi and Tom Gross},
  journal={Marine Ecology Progress Series},
  year={1996},
  volume={134},
  pages={235-245}
}
lngestion rates of Paraphysornonas imperforata Lucas feedlng on bacteria were studied under a range of turbulence ~ntensities. Turbulence had no effect on per cell ingestion rates of flagellates either upon initial exposure to turbulent conditions or after 12 h under the turbulence treatment. Flagellates increased in numbers and decreased in size at all turbulence intensities as well as in nonturbulence treatments, probably as an adaptation to an environment with lower food concentration than… 
Feeding behaviour of Centropages typicus in calm and turbulent conditions
Feeding of the copepod Centropages typicus on the oligotrich ciliate Strombidium sulcaturn was studied in the laboratory under controlled, measured conditions of grid generated small scale
Grazing on phytoplankton prey by the heterotrophic microflagellate Paraphysomonas vestita in nonbalanced growth conditions
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The predatory behaviour of a phagotrophic microflagellate, Paraphysomonas vestita, was studied in the transient conditions of a laboratory batch culture, indicating that phytoplankton were selected as prey in preference to bacteria by P. lutheri.
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A model of the effects of turbulence on predator-prey contact rates is discussed and it is suggested that the data reflect behavioral changes under turbulent conditions, which results in lower ingestion rates leading to lower growth rates.
Feeding and growth of the marine heterotrophic nanoflagellates, Procryptobia sorokini and Paraphysomonas imperforata on a bacterium, Pseudoalteromonas sp. with an inducible defence against grazing
Heterotrophic marine nanoflagellates are important grazers on bacteria in the water column. Some marine bacteria appear more resistant to grazing than do others. Marine nanoflagellates can be grown
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There was a negative relationship between the effects of turbulence on ingestion rates and the time needed to process a prey item in microzooplankton grazing estimates in the field, which could produce biased approximations of their impacts on primary producers.
Heterotrophic nanoflagellate enhancement of bacterial growth through nutrient remineralization in chemostat culture
TLDR
A tight coupling is demonstrated among flagellate grazing, nitrogen remineralization, and prey growth, resulting in bac- terial growth rates averaging 2- to 14-fold higher in the presence of flageLLate grazers, showing that independently measured grazing rates are essential in protist culture work if system dynamics are to be understood.
Effects of Temperature and Turbulence on the Predator–Prey Interactions between a Heterotrophic Flagellate and a Marine Bacterium
  • M. Delaney
  • Environmental Science
    Microbial Ecology
  • 2002
TLDR
It is shown that turbulence can influence nanoflagellate grazing at temperatures >5°C and suggests that at low temperatures, increased viscosity may limit the size of organisms that can be affected by small-scale turbulence.
MOLECULAR PHYLOGENETIC ANALYSIS OF THE HETEROTROPHIC CHRYSOPHYTE GENUS PARAPHYSOMONAS (CHRYSOPHYCEAE), AND THE DESIGN OF rRNA‐TARGETED OLIGONUCLEOTIDE PROBES FOR TWO SPECIES
TLDR
The development of species‐specific oligonucleotide probes for these nanoflagellate species and their application for counting nanofLagellates in natural water samples provide tools for studying these ecologically important species.
MOLECULAR PHYLOGENETIC ANALYSIS OF THE HETEROTROPHIC CHRYSOPHYTE GENUS PARAPHYSOMONAS ( CHRYSOPHYCEAE ) , AND THE DESIGN OF rRNA-TARGETED OLIGONUCLEOTIDE PROBES FOR TWO SPECIES 1
TLDR
Using sequenced small-subunit ribosomal RNA genes of four species of the colorless chrysophyte genus Paraphysomonas, phylogenetic analyses of these four species confirmed the affinity of the genus Parphysomona with other chrysophical species and supported a previous phylogenetic grouping of these species based on the morphology of the scales produced by these species.
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