1986
DOI: 10.3354/meps029237
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Feeding by the zooflagellate Pseudobodo sp. on the picoplanktonic prasinomonad Micromonas pusilla

Abstract: The trophodynamic interaction between a heterotrophic zooflagellate, Pseudobodo sp. (2 to 4 pm) and a small (-2 pm) prasinophyte, Micromonas pusilla, was studied in continuous culture. This zooflagellate was capable of phagocytizing Micromonas and causing a rapid decline in cell numbers of the latter. Maximum growth rate of the zooflagellate was about 2 d-I and maximum clearance rate was about 1 X 1 0 -~ 1 ind-I d-l. A video system was used to record its feeding behaviour. We attempted to estimate population p… Show more

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Cited by 46 publications
(48 citation statements)
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“…However, other studies have clearly indicated that phagotrophic flagellates can consume phytoplankton and produce phaeopigments (Stoecker 1984, Parslow et al 1986, Sherr et al 1986, Dryden & Wright 1987. Our results combined with the work of Landry et al (1984) indicate that defecation by small flagellates can be a significant source of phaeopigments.…”
Section: Discussionsupporting
confidence: 73%
See 1 more Smart Citation
“…However, other studies have clearly indicated that phagotrophic flagellates can consume phytoplankton and produce phaeopigments (Stoecker 1984, Parslow et al 1986, Sherr et al 1986, Dryden & Wright 1987. Our results combined with the work of Landry et al (1984) indicate that defecation by small flagellates can be a significant source of phaeopigments.…”
Section: Discussionsupporting
confidence: 73%
“…The potential use of these phaeopigments to study feeding relationships began to attract attention during the 1960s (Currie 1962, Nemoto 1968) and was explored quantitatively in subsequent years (Shuman & Lorenzen 1975, Welschmeyer & Lorenzen 1985, Laws et al 1988. There is no doubt that phaeopigments are commonly produced by a wide variety of zooplankton, including copepods, euphausids, salps, and phagotrophic flagellates (Nemoto 1968, Jeffrey 1980, Stoecker 1984, Parslow et al 1986, Sherr et al 1986, Dryden & Wright 1987. The fecal material excreted by these organisms has a considerable range of sinking rates, from almost negligible values (Small et al 1987) to about 100 m d-' (Lorenzen et al 1983).…”
Section: School Of Ocean and Earth Science And Technology Contributiomentioning
confidence: 99%
“…Sherr , dissolved organic carbon (Sherr 1988, Tranvik et al 1993. viruses (Gonzalez & Suttle 1993) and there may be trophic relationships within the nanoflagellate assemblage (Parslow et al 1986, Wikner & Hagstrom 1988. However, the portion of HNF carbon demand that is met by these trophic relationships has not been evaluated.…”
Section: Testing the Modelmentioning
confidence: 99%
“…Kuosa & Kivi (1989) have claimed that the standing stocks of HNF cannot always be supported by the available BT biomass and thus have to be supported by other food sources. The feeding of HNF on phototrophic picoplankton and nanoplankton, viruses or dissolved organic carbon , Gonzalez & Suttle 1993, Tranvik et al 1993, and trophic relationships within the nanoplankton assemblage (Parslow et al 1986, Wikner & Hagstrom 1988, could help explain why the BT-HNF relationship is not always strong.…”
Section: Introductionmentioning
confidence: 99%
“…Concurrently with the subsequent decrease in bacteria, nanoflagellates entered exponential growth, reaching a maximum biomass of 1 ng C mm-2 after 28 h. Thus, we assume that the flagellate population efficiently grazed on bacteria. From the changes in microbial density between 18 and 28 h after starting the incubation, we calculated a bacterial grazing rate of 18 bacteria flagellate-' h-'; this rate is most likely a conservative estimate since the bacteria probably continued to grow; the rate obtained is well within the range given in the literature (Fenchel 1986), however, and the Lotka-Volterra model has been shown to overestimate actual grazing rates (Parslow et al 1986). After the peaks in biomass of bacteria and nanoflagellates, the abundance of both groups oscillated with a progressive decrease in amplitude until 200 h after the start of the experiment (data not shown).…”
mentioning
confidence: 99%