Phytoplankton bloom dynamics of the western Ross Sea ice edge—I. Primary productivity and species-specific production

Wilson, David; Smith, Walker O; Nelson, David M.

doi:10.1016/0198-0149(86)90041-5

Cited by 163 publications

(82 citation statements)

References 23 publications

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“…Sasaki & Hoshiai 1986, Matsuda et al 1987, Tremblay et al 1989, massive sinking of ice-edge blooms (e.g. , Wilson et al 1986, Bathmann et al 1991, and sedimentation of algae from the spring-summer phytoplankton bloom (e.g. Schnack et al 1985, Sasaki & Hoshiai 1986, von Bodungen et al 1986, Handa et al 1992.…”

Section: Resultsmentioning

confidence: 99%

Contribution of algal sinking and zooplankton grazing to downward flux in the Lazarev Sea (Southern Ocean) during the onset of phytoplankton bloom: a lagrangian study

Pakhomov¹,

Froneman²,

Wassmann³

et al. 2002

Mar. Ecol. Prog. Ser.

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Section: Resultsmentioning

confidence: 99%

Contribution of algal sinking and zooplankton grazing to downward flux in the Lazarev Sea (Southern Ocean) during the onset of phytoplankton bloom: a lagrangian study

Pakhomov¹,

Froneman²,

Wassmann³

et al. 2002

Mar. Ecol. Prog. Ser.

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“…These values are much lower (more than 2 orders of magnitude) than spring and summer values from the region, and despite the long periods of low light over wide areas of the Antarctic, the productivity integrated throughout the entire winter will still b e a minor contribution to the carbon cycle of the region. To illustrate the quantitative contribution of winter phytoplankton production, if the productivity was 7 mg C m-2 d-' for 180 d (the approximate period assumed to have zero productivity by Smith & Nelson 1986), the total production for the 6 mo period would still b e only slightly over l g C m-', which is less than each day's production within an ice-edge bloom (Wilson et al 1986). Other estimates of annual and interannual productivity of the Antarctic and the southern ocean marginal ice zone , Smith et al 1988 have not included this production, but the error introduced by not including the winter production will be small.…”

Section: Discussionmentioning

confidence: 99%

“…Samples were dried at 60°C, after which 10 m1 of scintillation fluor were added and the samples counted as described above. A complete analytical description is given by Wilson et al (1986).…”

Section: Bransfield Strait Regionmentioning

confidence: 99%

Photosynthesis-irradiance relationships of antarctic phytoplankton during austral winter

Brightman¹,

Smith²

1989

Mar. Ecol. Prog. Ser.

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Results from photosynthesis-irradiance (P-I) experiments were used to examine photosynthetic adaptations of phytoplankton populations from the Bransfield Strait region in Antarctica during austral winter. Chlorophyll a concentrations during this period were low, ranging from 0.04 to 0.33 pg I-' in the mixed layer. Average photosynthetic efficiency (a) for surface populations was 0.021, andmean maximum photosynthetic rates (P:) were 1.19mg C (mg ch1)-' h-' ( 2 0 . 6 ) No apparent differences were found between photosynthetic parameters for open ocean regions or within the Bransfield Strait, and there was little evidence for adaptation within the water column. Integrated production within the euphotic zone was low, 1 to 7 mg C m-2 d-l, when estimated either from in situ measurements or from P-I relationships. These low primary productivity values support the belief that the waters within the Antarctic remain a region of extremely low productivity during the winter, despite conditions such as water column stratification and saturating surface irradiance levels which could potentially support phytoplankton growth.

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“…three genera have been reported in large population and blooms near Antarctica: Phaeocystis Lagerheim from the Weddell Sea (Buck and Garrison, 1983;Garrison and Buck, 1985) and the Ross Sea (El-Sayed et al, 1983;Palmisano et al, 1986), Thalassiosira Cleve from the Weddell Sea (El-Sayed, 1971;Hasle et al, 1971), and Nitzschia Hassal from the Ross Sea (Smith and Nelson, 1985;Wilson et al, 1986). Fryxell and Kendrick (1988) found that both Phaeocystis and Thalassiosira dominated the genera in the bloom outside the ice in the Weddell/Scotia Sea.…”

Section: / 77y/"mentioning

confidence: 99%

Most Abundant Diatom Species in Water Column Assemblages from Five Leg 119 Sites in Prydz Bay, Antarctica: Distributional Patterns

Kang¹,

Fryxell²

1991

Proceedings of the Ocean Drilling Program

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Austral summer surface and subsurface sampling of the water column was conducted at five drill sites (Sites 739-743) and included 14 stations in Prydz Bay, East Antarctica, from 66°S to 68°S approximately along 75°E, from 18 January through 3 February 1988. The samples were taken from seven depths at each station, between the surface and 200 m, to gain quantitative information on the composition, abundance, and distribution of the diatoms in water column assemblages in Prydz Bay.Over 40 , in the order of average abundance, respectively, and also as a time series in the short growing season.Two different distributional patterns were observed. Small pennate diatom species (< 20 µm), Nitzschia cylindrus, Nitzschia closterium, and Nitzschia curta, dominated at all drill sites and were distributed ubiquitously along the transect of sampling sites, while larger-celled (>20 µm) diatom species, Chaetoceros dichaeta, Chaetoceros neglectus, and Corethron criophilum, were concentrated in the inner part of Prydz Bay. The smaller-celled diatom species influenced the total diatom cell density and showed similar patterns of distribution to the totals, whereas profiles of the largercelled diatom species showed similar patterns to the chlorophyll a concentration. The larger-celled diatom species with their large cell volumes may affect the chlorophyll a distribution pattern and represent a significant biomass source inshore.Cluster analysis revealed different relationships depending on which variables were used for the analysis. When only larger-celled diatom species were included in the analysis, stations were separated clearly into those from the inner part of Prydz Bay (Sites 740 and 741) and those from the outer part of Prydz Bay (Sites 739, 742, and 743). But when only smaller-celled diatom species were used for analysis, the stations from inner and outer Prydz Bay intermingled and were not separated clearly.Diatom cell maxima were located slightly above the seasonal thermocline while chlorophyll a maxima were located in the thermocline, slightly below the diatom cell maxima. Vertical diatom distributions mirrored the physical structure in the bay. Principal component analysis (PCA) using diatom cell density (cells/L) and chlorophyll a concentration (µg /L) from discrete water samples (seven depths) as variables revealed that the samples from the Prydz Bay drill sites not only separated based on depth (above thermocline vs. below thermocline), but they also separated based on station.

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Phytoplankton bloom dynamics of the western Ross Sea ice edge—I. Primary productivity and species-specific production

Cited by 163 publications

References 23 publications

Contribution of algal sinking and zooplankton grazing to downward flux in the Lazarev Sea (Southern Ocean) during the onset of phytoplankton bloom: a lagrangian study

Contribution of algal sinking and zooplankton grazing to downward flux in the Lazarev Sea (Southern Ocean) during the onset of phytoplankton bloom: a lagrangian study

Photosynthesis-irradiance relationships of antarctic phytoplankton during austral winter

Most Abundant Diatom Species in Water Column Assemblages from Five Leg 119 Sites in Prydz Bay, Antarctica: Distributional Patterns

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