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  • PANGAEA  (96)
  • 2005-2009  (96)
Document type
Keywords
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  • 1
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    Unknown
    Abundance and biomass of protozooplankton from the iron-induced phytoplankton bloom during the EisenEx experiment in 2000 in the Southern Ocean (2006)
    PANGAEA
    In:  Supplement to: Henjes, Joachim; Assmy, Philipp; Klaas, Christine; Smetacek, Victor (2007): Response of the larger protozooplankton to an iron-induced phytoplankton bloom in the Polar Frontal Zone of the Southern Ocean (EisenEx). Deep Sea Research Part I: Oceanographic Research Papers, 54(5), 774-791, https://doi.org/10.1016/j.dsr.2007.02.005
    Details
    Publication Date: 2023-03-16
    Description: The responses of larger (〉50 µm in diameter) protozooplankton groups to a phytoplankton bloom induced by in situ iron fertilization (EisenEx) in the Polar Frontal Zone (PFZ) of the Southern Ocean in austral spring are presented. During the 21 days of the experiment, samples were collected from seven discrete depths in the upper 150 m inside and outside the fertilized patch for the enumeration of acantharia, foraminifera, radiolaria, heliozoa, tintinnid ciliates and aplastidic thecate dinoflagellates. Inside the patch, acantharian numbers increased twofold, but only negligibly in surrounding waters. This finding is of major interest, since acantharia are suggested to be involved in the formation of barite (BaSO_4 ) found in sediments and which is a palaeoindicator of both ancient and modern high productivity regimes. Foraminifera increased significantly in abundance inside and outside the fertilized patch. However the marked increase of juveniles after a full moon event suggests a lunar periodicity in the reproduction cycle of some foraminiferan species rather than a reproductive response to enhanced food availability. In contrast, adult radiolaria showed no clear trend during the experiment, but juveniles increased threefold indicating elevated reproduction. Aplastidic thecate dinoflagellates almost doubled in numbers and biomass, but also increased outside the patch. Tintinnid numbers decreased twofold, although biomass remained constant due to a shift in the size spectrum. Empty tintinnid loricae, however, increased by a factor of two indicating that grazing pressure on this group mainly by copepods intensified during EisenEx. The results show that iron-fertilization experiments can shed light on the biology and the role of these larger protists in pelagic ecosystem which will improve their use as proxies in palaeoceanography.
    Keywords: ANT-XVIII/2; CTD/Rosette; CTD11; CTD118; CTD121; CTD125; CTD130; CTD146; CTD15; CTD150; CTD19; CTD47; CTD52; CTD55; CTD58; CTD64; CTD67; CTD71; CTD75; CTD88; CTD-RO; EisenEx; European Iron Enrichment Experiment in the Southern Ocean; Polarstern; PS58/009-6; PS58/011-3; PS58/012-4; PS58/014-6; PS58/038-7; PS58/041-5; PS58/042-5; PS58/043-4; PS58/045-9; PS58/046-5; PS58/048-5; PS58/049-5; PS58/061-3; PS58/088-7; PS58/090-2; PS58/091-3; PS58/092-6; PS58/107-6; PS58/108-3; PS58 EISENEX; South Atlantic
    Type: Dataset
    Format: application/zip, 38 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
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    Unknown
    Abundance of microzooplankton determined during the EisenEx cruise ANT-XVIII/2 to the South Atlantic (2006)
    PANGAEA
    In:  Supplement to: Henjes, Joachim; Assmy, Philipp; Klaas, Christine; Verity, Peter; Smetacek, Victor (2007): Response of microzooplankton (protists and small copepods) to an iron-induced phytoplankton bloom in the Southern Ocean (EisenEx). Deep Sea Research Part I: Oceanographic Research Papers, 54(3), 363-384, https://doi.org/10.1016/j.dsr.2006.12.004
    Details
    Publication Date: 2023-03-16
    Description: The dynamics, composition and grazing impact of microzooplankton were studied during the in situ iron fertilisation experiment EisenEx in the Antarctic Polar Frontal Zone in austral spring (November 2000). During the 21 day experiment, protozooplankton and small metazooplankton were sampled from the mixed layer inside and outside the patch using Niskin bottles. Aplastidic dinoflagellates increased threefold in abundance and biomass in the first 10 d of the experiment, but decreased thereafter to values twofold higher than pre-fertilisation values. The decline after day 10 is attributed to increasing grazing pressure by copepods. They also constrained ciliate abundances and biomass which were higher inside the fertilised patch than outside but highly variable. Copepod nauplii abundance also remained stable whereas biomass doubled. Numbers of copepodites and adults of small copepod species increased threefold inside the patch, but doubled in surrounding waters. Grazing rates estimated using the dilution method suggest that microzooplankton grazing constrained pico- and nanoplankton populations, but species capable of feeding on large diatoms (dinoflagellates and small copepods including possibly nauplii) were selectively predated by the metazoan community. Thus, iron fertilisation of a developing spring phytoplankton assemblage resulted in a trophic cascade which favoured dominance of the bloom by large diatoms.
    Keywords: ANT-XVIII/2; CTD/Rosette; CTD117; CTD123; CTD126; CTD128; CTD145; CTD149; CTD16; CTD18; CTD45; CTD51; CTD54; CTD57; CTD61; CTD66; CTD70; CTD74; CTD87; CTD9; CTD-RO; EisenEx; European Iron Enrichment Experiment in the Southern Ocean; Polarstern; PS58/009-2; PS58/011-1; PS58/012-5; PS58/014-4; PS58/038-3; PS58/041-2; PS58/042-2; PS58/043-2; PS58/045-2; PS58/046-3; PS58/048-3; PS58/049-3; PS58/061-1; PS58/088-4; PS58/090-4; PS58/091-4; PS58/092-3; PS58/107-5; PS58/108-1; PS58 EISENEX; South Atlantic
    Type: Dataset
    Format: application/zip, 38 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    Diatom biomass as carbon measured on water bottle samples at station PS58/061-3 (2007)
    PANGAEA
    Details
    Publication Date: 2023-07-09
    Keywords: Actinocyclus curvatulus, biomass as carbon; ANT-XVIII/2; Asteromphalus hookeri, biomass as carbon; Asteromphalus hyalinus, biomass as carbon; Azpeitia tabularis, biomass as carbon; Calculated from biovolume (Edler, 1979, The Baltic Marine Biologist Pub 5); Chaetoceros aequatoriale, biomass as carbon; Chaetoceros atlanticus, biomass as carbon; Chaetoceros bulbosus, biomass as carbon; Chaetoceros convolutus, biomass as carbon; Chaetoceros curvisetus, biomass as carbon; Chaetoceros dichaeta, biomass as carbon; Chaetoceros neglectus, biomass as carbon; Chaetoceros peruvianus, biomass as carbon; Chaetoceros spp., biomass as carbon; Corethron inerme, biomass as carbon; Corethron pennatum, biomass as carbon; CTD/Rosette; CTD88; CTD-RO; Cylindrotheca closterium, biomass as carbon, fractionated; Dactyliosolen antarcticus, biomass as carbon; DEPTH, water; Diatoms, centrales, biomass as carbon; Dictyocha speculum, biomass as carbon; EisenEx; Eucampia antarctica, biomass as carbon; European Iron Enrichment Experiment in the Southern Ocean; Fragilariopsis kerguelensis, biomass as carbon; Fragilariopsis obliquecostata, biomass as carbon; Fragilariopsis rhombica, biomass as carbon; Guinardia cylindrus, biomass as carbon; Guinardia delicatula, biomass as carbon; Haslea sp., biomass as carbon; Leptocylindrus mediterraneus, biomass as carbon; Membraneis imposter, biomass as carbon; Navicula sp., biomass as carbon; Nitzschia bicapitata, biomass as carbon; Nitzschia sp., biomass as carbon; Pleurosigma atlanticus, biomass as carbon; Polarstern; Proboscia alata, biomass as carbon; PS58/061-3; PS58 EISENEX; Pseudo-nitzschia heimii, biomass as carbon; Pseudo-nitzschia lineola, biomass as carbon; Pseudo-nitzschia prolongatoides, biomass as carbon; Pseudo-nitzschia turgidula, biomass as carbon; Pseudo-nitzschia turgiduloides, biomass as carbon; Rhizosolenia chunii, biomass as carbon; Rhizosolenia curvata, biomass as carbon; Rhizosolenia hebetata forma semispina, biomass as carbon; South Atlantic; Thalassionema nitzschioides, biomass as carbon; Thalassionema nitzschioides var. lanceolata, biomass as carbon; Thalassiosira gracilis, biomass as carbon; Thalassiosira lentiginosa, biomass as carbon; Thalassiosira oestrupii, biomass as carbon; Thalassiosira oliverana, biomass as carbon; Thalassiosira tumida, biomass as carbon; Thalassiothrix antarctica, biomass as carbon
    Type: Dataset
    Format: text/tab-separated-values, 742 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    Diatom biomass as carbon measured on water bottle samples at station PS58/090-4 (2007)
    PANGAEA
    Details
    Publication Date: 2023-07-09
    Keywords: Actinocyclus curvatulus, biomass as carbon; ANT-XVIII/2; Asteromphalus hookeri, biomass as carbon; Asteromphalus hyalinus, biomass as carbon; Azpeitia tabularis, biomass as carbon; Calculated from biovolume (Edler, 1979, The Baltic Marine Biologist Pub 5); Chaetoceros aequatoriale, biomass as carbon; Chaetoceros atlanticus, biomass as carbon; Chaetoceros bulbosus, biomass as carbon; Chaetoceros convolutus, biomass as carbon; Chaetoceros curvisetus, biomass as carbon; Chaetoceros dichaeta, biomass as carbon; Chaetoceros neglectus, biomass as carbon; Chaetoceros peruvianus, biomass as carbon; Chaetoceros spp., biomass as carbon; Corethron inerme, biomass as carbon; Corethron pennatum, biomass as carbon; CTD/Rosette; CTD123; CTD-RO; Cylindrotheca closterium, biomass as carbon, fractionated; Dactyliosolen antarcticus, biomass as carbon; DEPTH, water; Diatoms, centrales, biomass as carbon; Dictyocha speculum, biomass as carbon; EisenEx; Eucampia antarctica, biomass as carbon; European Iron Enrichment Experiment in the Southern Ocean; Fragilariopsis kerguelensis, biomass as carbon; Fragilariopsis obliquecostata, biomass as carbon; Fragilariopsis rhombica, biomass as carbon; Guinardia cylindrus, biomass as carbon; Guinardia delicatula, biomass as carbon; Haslea sp., biomass as carbon; Leptocylindrus mediterraneus, biomass as carbon; Membraneis imposter, biomass as carbon; Navicula sp., biomass as carbon; Nitzschia bicapitata, biomass as carbon; Nitzschia sp., biomass as carbon; Pleurosigma atlanticus, biomass as carbon; Polarstern; Proboscia alata, biomass as carbon; PS58/090-4; PS58 EISENEX; Pseudo-nitzschia heimii, biomass as carbon; Pseudo-nitzschia lineola, biomass as carbon; Pseudo-nitzschia prolongatoides, biomass as carbon; Pseudo-nitzschia turgidula, biomass as carbon; Pseudo-nitzschia turgiduloides, biomass as carbon; Rhizosolenia chunii, biomass as carbon; Rhizosolenia curvata, biomass as carbon; Rhizosolenia hebetata forma semispina, biomass as carbon; South Atlantic; Thalassionema nitzschioides, biomass as carbon; Thalassionema nitzschioides var. lanceolata, biomass as carbon; Thalassiosira gracilis, biomass as carbon; Thalassiosira lentiginosa, biomass as carbon; Thalassiosira oestrupii, biomass as carbon; Thalassiosira oliverana, biomass as carbon; Thalassiosira tumida, biomass as carbon; Thalassiothrix antarctica, biomass as carbon
    Type: Dataset
    Format: text/tab-separated-values, 742 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    Abundance of empty diatom frustules measured on water bottle samples at station PS58/038-3 (2007)
    PANGAEA
    Details
    Publication Date: 2023-07-09
    Keywords: Actinocyclus curvatulus; ANT-XVIII/2; Asteromphalus hookeri; Asteromphalus hyalinus; Azpeitia tabularis; Chaetoceros aequatoriale; Chaetoceros atlanticus; Chaetoceros bulbosus; Chaetoceros convolutus; Chaetoceros curvisetus; Chaetoceros dichaeta; Chaetoceros neglectus; Chaetoceros peruvianus; Chaetoceros spp.; Corethron inerme; Corethron pennatum; CTD/Rosette; CTD45; CTD-RO; Cylindrotheca closterium; Dactyliosolen antarcticus; DEPTH, water; Diatoms, centrales; EisenEx; Eucampia antarctica; European Iron Enrichment Experiment in the Southern Ocean; Fragilariopsis kerguelensis; Fragilariopsis obliquecostata; Fragilariopsis rhombica; Guinardia cylindrus; Guinardia delicatula; Haslea sp.; Leptocylindrus mediterraneus; Membraneis imposter; Navicula sp.; Nitzschia bicapitata; Nitzschia sp.; Pleurosigma atlanticus; Polarstern; Proboscia alata; PS58/038-3; PS58 EISENEX; Pseudo-nitzschia heimii; Pseudo-nitzschia lineola; Pseudo-nitzschia prolongatoides; Pseudo-nitzschia turgidula; Pseudo-nitzschia turgiduloides; Quantitative phytoplankton method (Utermöhl, 1958); Rhizosolenia chunii; Rhizosolenia curvata; Rhizosolenia hebetata forma semispina; South Atlantic; Thalassionema nitzschioides; Thalassionema nitzschioides var. lanceolata; Thalassiosira gracilis; Thalassiosira lentiginosa; Thalassiosira oestrupii; Thalassiosira oliverana; Thalassiosira tumida; Thalassiothrix antarctica
    Type: Dataset
    Format: text/tab-separated-values, 728 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
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    Abundance of empty diatom frustules measured on water bottle samples at station PS58/046-3 (2007)
    PANGAEA
    Details
    Publication Date: 2023-07-09
    Keywords: Actinocyclus curvatulus; ANT-XVIII/2; Asteromphalus hookeri; Asteromphalus hyalinus; Azpeitia tabularis; Chaetoceros aequatoriale; Chaetoceros atlanticus; Chaetoceros bulbosus; Chaetoceros convolutus; Chaetoceros curvisetus; Chaetoceros dichaeta; Chaetoceros neglectus; Chaetoceros peruvianus; Chaetoceros spp.; Corethron inerme; Corethron pennatum; CTD/Rosette; CTD66; CTD-RO; Cylindrotheca closterium; Dactyliosolen antarcticus; DEPTH, water; Diatoms, centrales; EisenEx; Eucampia antarctica; European Iron Enrichment Experiment in the Southern Ocean; Fragilariopsis kerguelensis; Fragilariopsis obliquecostata; Fragilariopsis rhombica; Guinardia cylindrus; Guinardia delicatula; Haslea sp.; Leptocylindrus mediterraneus; Membraneis imposter; Navicula sp.; Nitzschia bicapitata; Nitzschia sp.; Pleurosigma atlanticus; Polarstern; Proboscia alata; PS58/046-3; PS58 EISENEX; Pseudo-nitzschia heimii; Pseudo-nitzschia lineola; Pseudo-nitzschia prolongatoides; Pseudo-nitzschia turgidula; Pseudo-nitzschia turgiduloides; Quantitative phytoplankton method (Utermöhl, 1958); Rhizosolenia chunii; Rhizosolenia curvata; Rhizosolenia hebetata forma semispina; South Atlantic; Thalassionema nitzschioides; Thalassionema nitzschioides var. lanceolata; Thalassiosira gracilis; Thalassiosira lentiginosa; Thalassiosira oestrupii; Thalassiosira oliverana; Thalassiosira tumida; Thalassiothrix antarctica
    Type: Dataset
    Format: text/tab-separated-values, 728 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 7
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    Abundance of empty diatom frustules measured on water bottle samples at station PS58/088-4 (2007)
    PANGAEA
    Details
    Publication Date: 2023-07-09
    Keywords: Actinocyclus curvatulus; ANT-XVIII/2; Asteromphalus hookeri; Asteromphalus hyalinus; Azpeitia tabularis; Chaetoceros aequatoriale; Chaetoceros atlanticus; Chaetoceros bulbosus; Chaetoceros convolutus; Chaetoceros curvisetus; Chaetoceros dichaeta; Chaetoceros neglectus; Chaetoceros peruvianus; Chaetoceros spp.; Corethron inerme; Corethron pennatum; CTD/Rosette; CTD117; CTD-RO; Cylindrotheca closterium; Dactyliosolen antarcticus; DEPTH, water; Diatoms, centrales; EisenEx; Eucampia antarctica; European Iron Enrichment Experiment in the Southern Ocean; Fragilariopsis kerguelensis; Fragilariopsis obliquecostata; Fragilariopsis rhombica; Guinardia cylindrus; Guinardia delicatula; Haslea sp.; Leptocylindrus mediterraneus; Membraneis imposter; Navicula sp.; Nitzschia bicapitata; Nitzschia sp.; Pleurosigma atlanticus; Polarstern; Proboscia alata; PS58/088-4; PS58 EISENEX; Pseudo-nitzschia heimii; Pseudo-nitzschia lineola; Pseudo-nitzschia prolongatoides; Pseudo-nitzschia turgidula; Pseudo-nitzschia turgiduloides; Quantitative phytoplankton method (Utermöhl, 1958); Rhizosolenia chunii; Rhizosolenia curvata; Rhizosolenia hebetata forma semispina; South Atlantic; Thalassionema nitzschioides; Thalassionema nitzschioides var. lanceolata; Thalassiosira gracilis; Thalassiosira lentiginosa; Thalassiosira oestrupii; Thalassiosira oliverana; Thalassiosira tumida; Thalassiothrix antarctica
    Type: Dataset
    Format: text/tab-separated-values, 728 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 8
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    Abundance of empty diatom frustules measured on water bottle samples at station PS58/090-4 (2007)
    PANGAEA
    Details
    Publication Date: 2023-07-09
    Keywords: Actinocyclus curvatulus; ANT-XVIII/2; Asteromphalus hookeri; Asteromphalus hyalinus; Azpeitia tabularis; Chaetoceros aequatoriale; Chaetoceros atlanticus; Chaetoceros bulbosus; Chaetoceros convolutus; Chaetoceros curvisetus; Chaetoceros dichaeta; Chaetoceros neglectus; Chaetoceros peruvianus; Chaetoceros spp.; Corethron inerme; Corethron pennatum; CTD/Rosette; CTD123; CTD-RO; Cylindrotheca closterium; Dactyliosolen antarcticus; DEPTH, water; Diatoms, centrales; EisenEx; Eucampia antarctica; European Iron Enrichment Experiment in the Southern Ocean; Fragilariopsis kerguelensis; Fragilariopsis obliquecostata; Fragilariopsis rhombica; Guinardia cylindrus; Guinardia delicatula; Haslea sp.; Leptocylindrus mediterraneus; Membraneis imposter; Navicula sp.; Nitzschia bicapitata; Nitzschia sp.; Pleurosigma atlanticus; Polarstern; Proboscia alata; PS58/090-4; PS58 EISENEX; Pseudo-nitzschia heimii; Pseudo-nitzschia lineola; Pseudo-nitzschia prolongatoides; Pseudo-nitzschia turgidula; Pseudo-nitzschia turgiduloides; Quantitative phytoplankton method (Utermöhl, 1958); Rhizosolenia chunii; Rhizosolenia curvata; Rhizosolenia hebetata forma semispina; South Atlantic; Thalassionema nitzschioides; Thalassionema nitzschioides var. lanceolata; Thalassiosira gracilis; Thalassiosira lentiginosa; Thalassiosira oestrupii; Thalassiosira oliverana; Thalassiosira tumida; Thalassiothrix antarctica
    Type: Dataset
    Format: text/tab-separated-values, 728 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 9
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    Abundance of empty diatom frustules measured on water bottle samples at station PS58/091-4 (2007)
    PANGAEA
    Details
    Publication Date: 2023-07-09
    Keywords: Actinocyclus curvatulus; ANT-XVIII/2; Asteromphalus hookeri; Asteromphalus hyalinus; Azpeitia tabularis; Chaetoceros aequatoriale; Chaetoceros atlanticus; Chaetoceros bulbosus; Chaetoceros convolutus; Chaetoceros curvisetus; Chaetoceros dichaeta; Chaetoceros neglectus; Chaetoceros peruvianus; Chaetoceros spp.; Corethron inerme; Corethron pennatum; CTD/Rosette; CTD126; CTD-RO; Cylindrotheca closterium; Dactyliosolen antarcticus; DEPTH, water; Diatoms, centrales; EisenEx; Eucampia antarctica; European Iron Enrichment Experiment in the Southern Ocean; Fragilariopsis kerguelensis; Fragilariopsis obliquecostata; Fragilariopsis rhombica; Guinardia cylindrus; Guinardia delicatula; Haslea sp.; Leptocylindrus mediterraneus; Membraneis imposter; Navicula sp.; Nitzschia bicapitata; Nitzschia sp.; Pleurosigma atlanticus; Polarstern; Proboscia alata; PS58/091-4; PS58 EISENEX; Pseudo-nitzschia heimii; Pseudo-nitzschia lineola; Pseudo-nitzschia prolongatoides; Pseudo-nitzschia turgidula; Pseudo-nitzschia turgiduloides; Quantitative phytoplankton method (Utermöhl, 1958); Rhizosolenia chunii; Rhizosolenia curvata; Rhizosolenia hebetata forma semispina; South Atlantic; Thalassionema nitzschioides; Thalassionema nitzschioides var. lanceolata; Thalassiosira gracilis; Thalassiosira lentiginosa; Thalassiosira oestrupii; Thalassiosira oliverana; Thalassiosira tumida; Thalassiothrix antarctica
    Type: Dataset
    Format: text/tab-separated-values, 728 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 10
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    Abundance of non-diatom phytoplankton measured on water bottle samples at station PS58/009-2 (2007)
    PANGAEA
    Details
    Publication Date: 2023-07-09
    Keywords: ANT-XVIII/2; Coccolithophoridae; CTD/Rosette; CTD9; CTD-RO; DEPTH, water; Dinoflagellates, autotrophic; EisenEx; European Iron Enrichment Experiment in the Southern Ocean; Flagellates, autotrophic; Mesoporos perforatus; Phaeocystis; Polarstern; Prorocentrum spp.; PS58/009-2; PS58 EISENEX; Quantitative phytoplankton method (Utermöhl, 1958); South Atlantic
    Type: Dataset
    Format: text/tab-separated-values, 105 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
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