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| Formato: | Dataset Open Access |
| Lenguaje: | en |
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PANGAEA
2002
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| Acceso en línea: | https://doi.org/10.1594/PANGAEA.58938 |
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| _version_ | 1867169528604000256 |
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| author | Esper, Oliver Zonneveld, Karin A F |
| author_facet | Esper, Oliver Zonneveld, Karin A F |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Thirty-two surface sediment samples from the Southern Ocean (eastern Atlantic sector), between the Subtropical Front and the Weddell Gyre, were investigated to provide information on the distribution of modern organic-walled dinoflagellate cysts in relation to the oceanic fronts of the Antarctic Circumpolar Current (ACC). A clearly distinguishable distribution pattern was observed in relation to the water masses and fronts of the ACC. The dinoflagellate cysts of species characteristic of open oceanic environments, such as Impagidinium species, are highly abundant around the Subtropical Front, whereas south of this front, cosmopolitan species such as Nematosphaeropsis labyrinthus and the cysts of Protoceratium reticulatum characterise the transition from subtropical to subantarctic surface waters. The subantarctic surface waters are dominated by the cysts of heterotrophic dinoflagellates, such as Protoperidinium spp. and Selenopemphix antarctica. The cysts of Protoperidinium spp. form the dominant part of the assemblages around the Antarctic Polar Front, whereas S. antarctica concentrations increase further to the south. The presence of S. antarctica in sediments of the Maud Rise, a region of seasonal sea-ice cover, reflects its tolerance for low temperatures and sea-ice cover. A previously undescribed species, Cryodinium meridianum gen. nov. sp. nov., has a restricted distribution pattern between the Antarctic Polar Front and the ACC-Weddell Gyre Boundary. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_58938 |
| institution | PANGAEA |
| language | en |
| publishDate | 2002 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Abundance of organic-walled dinoflagellate cysts in surface sediments from the Atlantic sector of the Southern Ocean (Appendix 2) Esper, Oliver Zonneveld, Karin A F ANT-IV/4; ANT-VI/3; ANT-X/4; ANT-X/6; Atlantic Indik Ridge; AWI_Paleo; Bitectatodinium tepikiense; Brazil Basin; Brigantedinium; Brigantedinium simplex; Cape Basin; Central South Atlantic; Counting, palynology; Dalella chathamensis; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Dinoflagellate cyst indeterminata; Dinoflagellate cyst reworked; Echinidinium aculeatum; Echinidinium delicatum; Echinidinium granulatum; Echinidinium spp.; Echinidinium transparantum; Elevation of event; Event label; GeoB2011-1; GeoB2018-1; GeoB2019-2; GeoB2021-4; GeoB2022-3; GeoB6407-2; GeoB6409-2; GeoB6413-4; GeoB6414-1; GeoB6416-2; GeoB6417-2; GeoB6418-3; GeoB6420-2; GeoB6421-1; GeoB6422-5; GeoB6425-1; GeoB6427-1; GeoB6429-1; Giant box corer; GKG; Impagidinium aculeatum; Impagidinium pallidum; Impagidinium paradoxum; Impagidinium patulum; Impagidinium plicatum; Impagidinium sp.; Impagidinium sphaericum; Impagidinium strialatum; Impagidinium variaseptum; Impagidinium velorum; Latitude of event; Longitude of event; M23/1; M46/4; Maud Rise; Meteor (1986); MIC; MiniCorer; MUC; MultiCorer; Multispinula quanta; Nematosphaeropsis labyrinthus; Operculodinium israelianum long; Operculodinium israelianum short; Operculodinium janduchenei; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Pentapharsodinium dalei; Polarstern; Polykrikos kofoidii; Protoceratium reticulatum long; Protoceratium reticulatum short; PS08; PS08/564; PS08/621; PS08/627; PS12; PS12/284; PS12/549; PS12/551; PS12/553; PS12/555; PS12/557; PS1451-2; PS1459-4; PS1460-1; PS1585-1; PS1650-1; PS1651-2; PS1652-1; PS1653-2; PS1654-1; PS21 06AQANTX_4; PS22; PS22/899; PS22/902; PS22/947; PS22/973; PS2230-1; PS2366-1; PS2367-1; PS2372-1; PS2376-2; Pyxidinopsis reticulata; Sample mass; Sample volume; see reference(s); Selenopemphix alticinctum; Selenopemphix antarcticum; Slide volume; South Atlantic Ocean; Spiniferites; Spiniferites elongatus; Spiniferites mirabilis; Spiniferites pachydermus; Spiniferites ramosus; Stelladinium stellatum; Trinovantedinium capitatum Thirty-two surface sediment samples from the Southern Ocean (eastern Atlantic sector), between the Subtropical Front and the Weddell Gyre, were investigated to provide information on the distribution of modern organic-walled dinoflagellate cysts in relation to the oceanic fronts of the Antarctic Circumpolar Current (ACC). A clearly distinguishable distribution pattern was observed in relation to the water masses and fronts of the ACC. The dinoflagellate cysts of species characteristic of open oceanic environments, such as Impagidinium species, are highly abundant around the Subtropical Front, whereas south of this front, cosmopolitan species such as Nematosphaeropsis labyrinthus and the cysts of Protoceratium reticulatum characterise the transition from subtropical to subantarctic surface waters. The subantarctic surface waters are dominated by the cysts of heterotrophic dinoflagellates, such as Protoperidinium spp. and Selenopemphix antarctica. The cysts of Protoperidinium spp. form the dominant part of the assemblages around the Antarctic Polar Front, whereas S. antarctica concentrations increase further to the south. The presence of S. antarctica in sediments of the Maud Rise, a region of seasonal sea-ice cover, reflects its tolerance for low temperatures and sea-ice cover. A previously undescribed species, Cryodinium meridianum gen. nov. sp. nov., has a restricted distribution pattern between the Antarctic Polar Front and the ACC-Weddell Gyre Boundary. |
| title | Abundance of organic-walled dinoflagellate cysts in surface sediments from the Atlantic sector of the Southern Ocean (Appendix 2) |
| topic | ANT-IV/4; ANT-VI/3; ANT-X/4; ANT-X/6; Atlantic Indik Ridge; AWI_Paleo; Bitectatodinium tepikiense; Brazil Basin; Brigantedinium; Brigantedinium simplex; Cape Basin; Central South Atlantic; Counting, palynology; Dalella chathamensis; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Dinoflagellate cyst indeterminata; Dinoflagellate cyst reworked; Echinidinium aculeatum; Echinidinium delicatum; Echinidinium granulatum; Echinidinium spp.; Echinidinium transparantum; Elevation of event; Event label; GeoB2011-1; GeoB2018-1; GeoB2019-2; GeoB2021-4; GeoB2022-3; GeoB6407-2; GeoB6409-2; GeoB6413-4; GeoB6414-1; GeoB6416-2; GeoB6417-2; GeoB6418-3; GeoB6420-2; GeoB6421-1; GeoB6422-5; GeoB6425-1; GeoB6427-1; GeoB6429-1; Giant box corer; GKG; Impagidinium aculeatum; Impagidinium pallidum; Impagidinium paradoxum; Impagidinium patulum; Impagidinium plicatum; Impagidinium sp.; Impagidinium sphaericum; Impagidinium strialatum; Impagidinium variaseptum; Impagidinium velorum; Latitude of event; Longitude of event; M23/1; M46/4; Maud Rise; Meteor (1986); MIC; MiniCorer; MUC; MultiCorer; Multispinula quanta; Nematosphaeropsis labyrinthus; Operculodinium israelianum long; Operculodinium israelianum short; Operculodinium janduchenei; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Pentapharsodinium dalei; Polarstern; Polykrikos kofoidii; Protoceratium reticulatum long; Protoceratium reticulatum short; PS08; PS08/564; PS08/621; PS08/627; PS12; PS12/284; PS12/549; PS12/551; PS12/553; PS12/555; PS12/557; PS1451-2; PS1459-4; PS1460-1; PS1585-1; PS1650-1; PS1651-2; PS1652-1; PS1653-2; PS1654-1; PS21 06AQANTX_4; PS22; PS22/899; PS22/902; PS22/947; PS22/973; PS2230-1; PS2366-1; PS2367-1; PS2372-1; PS2376-2; Pyxidinopsis reticulata; Sample mass; Sample volume; see reference(s); Selenopemphix alticinctum; Selenopemphix antarcticum; Slide volume; South Atlantic Ocean; Spiniferites; Spiniferites elongatus; Spiniferites mirabilis; Spiniferites pachydermus; Spiniferites ramosus; Stelladinium stellatum; Trinovantedinium capitatum |
| url | https://doi.org/10.1594/PANGAEA.58938 |