1983
DOI: 10.3354/meps014059
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Productivity and population diversity of marine organotrophic bacteria in enclosed planktonic ecosystems

Abstract: Enclosed ecosystem experiments with marine plankton were carried out in Rosfjord, Nonuay, March-April, 1979. We report results from studies on planktonic bacteria in natural communities and cultures of phytoplankton contained in l -m diameter flexible plastic bags, and compare these to observations in the surrounding sea. Emphasis was on organotrophic bacteria and their diversity dynamics, particularly in relation to phytoplankton. Five previously isolated strains of bacteria were followed by immunofluorescent… Show more

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Cited by 14 publications
(14 citation statements)
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“…If we assume that the difference in bacterial growth rates of surface and bottom waters is solely due temperature effect, then a temperature coefficient Ql0 of 5.5 to 7.4 can be calculated. This is considerably higher than Q' ,, values found for bacterial or phytoplankton growth rates (Eppley 1972, Laake et al 1983 or for uptake rates of glucose (Takahashi & Ichimuro 1971, Toerien & Cavari 1982, which are generally around 2. Conversely, if we assume a Q,, of 2 for bacterial growth rates, then it can be estimated that the growth rates of the 60 m bacterial population would rise from 0.34 d-' to 0.47 d-I when subjected to surface water temperatures.…”
Section: Ecological Considerationsmentioning
confidence: 73%
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“…If we assume that the difference in bacterial growth rates of surface and bottom waters is solely due temperature effect, then a temperature coefficient Ql0 of 5.5 to 7.4 can be calculated. This is considerably higher than Q' ,, values found for bacterial or phytoplankton growth rates (Eppley 1972, Laake et al 1983 or for uptake rates of glucose (Takahashi & Ichimuro 1971, Toerien & Cavari 1982, which are generally around 2. Conversely, if we assume a Q,, of 2 for bacterial growth rates, then it can be estimated that the growth rates of the 60 m bacterial population would rise from 0.34 d-' to 0.47 d-I when subjected to surface water temperatures.…”
Section: Ecological Considerationsmentioning
confidence: 73%
“…Prolonged confinement of sea water samples in bottles was found to lead to an increase in the growth rates of the bacterial population due to competitive advantage of fast developing organisms which may exploit nutrient enrichment at the walls of the incubation vessels (Ferguson et al 1984). Thus, short incubation times were recommended to avoid the above mentioned development of an opportunist bacterial population.…”
Section: Ecological Considerationsmentioning
confidence: 99%
“…Whether or not single bacterial species become dominant in large areas has been a matter of speculation but has remained unresolved for lack of a suitable method (Dahle and Laake, 1982;Laake et al, 1983). In the Southern Ocean, successions of populations were clearly observed in both water and sediment (Delille, 1990(Delille, , 1995.…”
Section: Spatial and Temporal Variabilitymentioning
confidence: 99%
“…Although generalisations about the changes in population structure from only a small fraction of the population are subject to the constraints inherent in plating techniques, plateable bacteria may form a significant proportion of the active population (Bolter 1977). Furthermore, plate counts may be a sensitive indicator of the overall structure and nutritional capability of the population (Laake et al 1983, Muir 1986). Similar wellordered successions of bacterial isolates associated with dissolved and particulate phytoplankton carbon substrates have previously been described by Fukami et al (1985a, b).…”
Section: Microbial Community Developmentmentioning
confidence: 99%