The ecology and feeding biology of thecate heterotrophic dinoflagellates

Jacobson, Dean M.

doi:10.1575/1912/3937

Cited by 34 publications

(39 citation statements)

References 31 publications

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“…lo6 liter-l) for maintenance of the population (Goldman et al 1989;Hansen 1992). The requirement for high prey concentrations suggests that N. scintillans and other heterotrophic dinoflagellates do not bloom until their phytoplankton prey blooms (Goldman et al 1989;Hansen 1992;Jacobson 1987). Because N. scintillans requires phytoplankton cell concentrations of -1 O6 liter-' to support growth (Buskey 1995;Nawata and Sibaoka 1983) natural conditions seldom favor survival.…”

Section: Notesmentioning

confidence: 99%

“…Heterotrophic dinoflagellates such as N. scintillans are common members of the plankton (e.g. Dodge and Hart-Jones 1974;Kimor 198 1;Lefevre and Grall 1970), but research (Goldman et al 1989;Hansen 1992;Jacobson 1987) suggests that prey concentrations in the field are almost always too low to support cell growth.…”

Section: Notesmentioning

confidence: 99%

“…Studies increasingly indicate that heterotrophic dinoflagellates play an important role in oceanic food webs (Jacobson 1987;Lessard 199 1;Spero 1985). Many studies indicate that heterotrophic dinoflagellates require higher concentrations of prey than are normally present in the open ocean.…”

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confidence: 99%

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Feeding by a heterotrophic dinoflagellate (Noctiluca scintillans) in marine snow

Shanks

Walters

1996

Limnology & Oceanography

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Abstract-Marine snow samples were collected on two dates (20 and 27 August 1992) in the San Juan Islands, Washington. On both sampling dates the heterotrophic dinoflagellate Noctiluca scintillans was concentrated in aggregates. On 20 August "small" and "large" aggregates were sampled separately. The data indicate that on this date, all of the N. scintillans were in aggregates and that most were in the large aggregates. About 60% of the N. scintillans contained food, which, given their association with aggregates, likely resulted from feeding in marine snow. On 27 August, 5 1% of the N. scintillans were in aggregates and

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Section: Notesmentioning

confidence: 99%

Section: Notesmentioning

confidence: 99%

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Feeding by a heterotrophic dinoflagellate (Noctiluca scintillans) in marine snow

Shanks

Walters

1996

Limnology & Oceanography

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“…So far, most studies of the predation by copepods on heterotrophic protists have focused on ciliates, emphasizing their importance as a food source for copepods (Stoecker & Egloff 1987, Gifford & Dagg 1988, Ohman & Runge 1994. Heterotrophic dinoflagellates are often among the most abundant heterotrophic protists (Lessard 1984, Jacobson 1987, and the heterotrophic dinoflagellate Oxyrrhis marina has proved suitable food for continuously breeding and culturing some copepods (Klein Breteler 1980, Klein Breteler & Gonzalez 1986. However, there are a few studies (Klein Breteler et al 1990, Gifford & Dagg 1991, Hansen et al 1993) quantifying the predation rates of copepods on heterotrophic dinoflagellates and the predation effect of copepods on dynamics of both heterotrophic dinoflagellates and their phytoplankton Prey.…”

Section: Introductionmentioning

confidence: 99%

“…Species in the genus Protoperidiniurn often dominate the biomass of heterotrophic protists > 20 pm in size in coastal (Jacobson 1987) and oceanic waters (Lessard 1984). They are present all year in the coastal waters of southern California, USA (Allen 1949, Reid et al 1970 and are often particularly abundant (up to 26.5 cells ml-') during red tides of autotrophic dinoflagellates (Allen 1949, Jeong unpubl.…”

Section: Introductionmentioning

confidence: 99%

Predation effects of the calanoid copepod Acartia tonsa on a population of the heterotrophic dinoflagellate Protoperidinium cf. divergens in the presence of cooccurring red-tide dinoflagellate prey

Jeong¹

1994

Mar. Ecol. Prog. Ser.

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This study investigated feeding rates and selective feeding of the common copepod Acartia tonsa on mixtures of the heterotrophic dinoflagellate Protoperidinium cf. divergens and the cooccurring red-tide dinoflagellate Gonyaulax polyedra and predation effects of A. tonsa on the population growth of P cf. divergens during simulated red-tide and non-red-tide periods. Ingestion and clearance rates of A. tonsa on P cf. d~vergens were similar to those on ciliates of similar cell volumes measured in other studies, when each heterotrophic protist was offered as the only prey and similar prey densities were used. In general, in mixed prey experiments, there was no evidence of a strong preference by A. tonsa for P cf. divergens over G. polyedra. However, there may be a weak preference at low total prey concentrations or low ratios of prey availability (G. po1yedra:P cf. divergens). A. tonsa ingested similar amounts of carbon from P cf. divergens and G. polyedra at a G. po1yedra:P cf. divergens carbon biomass ratio of about 1.8. The maximum clearance rate of A. tonsa on P cf. divergens (5.5 m1 Acartia-l h-') was higher than that on G. polyedra (3.1 m1 Acartia-' h-'). The effect of A. tonsa predation on the population growth of P cf. divergens decreased with increasing G. polyedra concentrations and was negligible at 2200 cells ml-'. At low G. polyedra concentrations, high mortality rates of P cf. divergens due to A. tonsa predation may enable A. tonsa to limit the population growth of P cf. divergens. However, a dense layer of G. polyedra may provide P cf. divergens a 'refuge' from A. tonsa predation during red tides.

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Feeding, growth and bioluminescence of the heterotrophic dinoflagellate Protoperidinium huberi

1994

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The ecology and feeding biology of thecate heterotrophic dinoflagellates

Cited by 34 publications

References 31 publications

Feeding by a heterotrophic dinoflagellate (Noctiluca scintillans) in marine snow

Feeding by a heterotrophic dinoflagellate (Noctiluca scintillans) in marine snow

Predation effects of the calanoid copepod Acartia tonsa on a population of the heterotrophic dinoflagellate Protoperidinium cf. divergens in the presence of cooccurring red-tide dinoflagellate prey

Feeding, growth and bioluminescence of the heterotrophic dinoflagellate Protoperidinium huberi

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