Phaeocystis and Herring Shoals

Savage, Robert E.

doi:10.2307/2256082

Cited by 16 publications

(10 citation statements)

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“…This has been reported to adversely affect the migration of commercially important fish such as herring (Savage 1930). Despite the extensive literature, the life cycle is, however, still not well understood , and several different flagellated stages have been observed in culture (Kommann 1955).…”

Section: Chrysochromulina Parkeae Green Et Leadbeatermentioning

confidence: 99%

Identification by electron microscopy of marine nanoplankton from New Zealand, including the description of four new species

Moestrup

1979

New Zealand Journal of Botany

117

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The marine nanoplankton of New Zealand has been examined for the first time by a combination of transmission and scanning electron microscopy. Of the c. 50 taxa found, practically all are known also from the Northern Hemisphere. As in this part of the world, the nanoplankton consists mainly of members of the systematic groups Chrysophyceae, Prymnesiophyceae (Haptophyceae), Loxo-and Prasinophyceae, and Choanoflagellida. Four new species are described: the prymnesiophytes Chrysochromulina novae-zelandiae and Phaeocystis scrobiculata, the choanoflagellate Bicosta antennigera, and Petasaria heterolepis, a flagellate of unknown affinities. Cells of the latter are covered by a scaly periplast, which contains both unmineralised and mineralised scales, of which the latter are siliceous (as demonstrated by X-ray microanalysis

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Section: Chrysochromulina Parkeae Green Et Leadbeatermentioning

confidence: 99%

Identification by electron microscopy of marine nanoplankton from New Zealand, including the description of four new species

Moestrup

1979

New Zealand Journal of Botany

117

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“…An antagonistic nature of P. pouchetii to other trophic levels has been suggested (Savage 1932, Zenkievitch 1963, Martens 1981, Schnack e t al. 1984.…”

Section: Introductionmentioning

confidence: 98%

Mass sedimentation of Phaeocystis pouchetii in the Barents Sea

Wassmann¹,

Vernet²,

Mitchell³

et al. 1990

Mar. Ecol. Prog. Ser.

180

102

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Mass sedimentation of gelatinous colonies of the prymensiophyte Phaeocystis pouchetii were observed in the upper 100 m of Atlantic water in the central Barents Sea. Sedimentation rates of particulate organic carbon and nitrogen as well as pigments were the highest recorded so far from oceanic environments of the North Atlantic or coastal areas of Norway. High relative concentrat~ons of phytoplankton pigments found in the traps are interpreted as a combination of sinlung of intact phytoplankton cells and undegraded pigments present in macrozooplankton faecal pellets. Evldence presented in this study implies that the zooplankton community of the Barents Sea was not able to control this phytoplankton spnng bloom. The suspended and sedimenting organic matter was rlch in carbon and pigments, but poor in nitrogen. This is explained by the presence of large amounts of carbon-rich mucilage which P. pouchetii colonies develop during their development. In addition to diatoms, sedimentation of a gelatinous phytoplankton species like P. pouchetii may contribute significantly to the formation of marine snow and vertical flux from the euphotic zone. However, degradation of P. pouchetii derived detritus at depths less than 100 m greatly diminishes the likely significance of P. pouchetii blooms in processes such as the carbon flux to the deep ocean and sequestering of CO2.

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“…Cadee 1986), which has been reported to cause nuisances and possible econonlic drawbacks in fishery (e.g. Savage 1932) and tourism (Lancelot et al 1987). Environmental problems are suspected from diinethylsulfide (DMS) release (Turner et al 1988 and references cited therein) and mass production and sedimentation (Wassmann 1990) of organic matter, for which the impact on the benthic and pelagic food web structure is still unclear.…”

Section: Introductionmentioning

confidence: 99%

Grazing pressure of the calanoid copepod Temora longicornis on a Phaeocystis dominated spring bloom in a Dutch tidal inlet

Hansen¹,

Boekel

1991

Mar. Ecol. Prog. Ser.

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Between 30 March and 1 1 May 1990, total copepod abundance and the abundance. b~o m a s s and gut fluorescence of Temora longlcornls were determined and related to the abundance and succession of phytoplankton development in a Dutch tidal inlet Gut plgment values were h~g h e s t In females and lowest In young copepodites, but weight-spec~f~c pigment concentrations were about slrnilar Pigment levels measured In the guts were relatively high at the beginning and end of the penod of investigation when diatoms d o m~n a t e d the phytoplankton community, dnd low d u n n g the Phaeocystls d o m~n a t e d period, when ambient chlorophyll concentrations were h~g h e s t For the latter period, calculated ingestion rates In T longlcornls were low and estimated dally consumption amounted to less than 1 % of the phytoplankton standing stock, s u g g e s w g a negl~gible grazlng Impact on the development of the Phaeoc)/stls bloom In splte of the low grazrng on phytoplankton. T long]-corms biomass increased by one older of magnitude The discrepancy between low giazlng pressuie and copepod development is explained by assumlng that T long~cornls scvltched to heterotrophic food a bloom of ciliates present during the Phaeocystls dominated period

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Phaeocystis and Herring Shoals

Cited by 16 publications

References 0 publications

Identification by electron microscopy of marine nanoplankton from New Zealand, including the description of four new species

Identification by electron microscopy of marine nanoplankton from New Zealand, including the description of four new species

Mass sedimentation of Phaeocystis pouchetii in the Barents Sea

Grazing pressure of the calanoid copepod Temora longicornis on a Phaeocystis dominated spring bloom in a Dutch tidal inlet

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