Microplanktonic distributional patterns west of the Antarctic Peninsula, with special emphasis on the Tintinnids
Microplankton was sampled with a centrifugal suction pump in the surface layer (approx. 9 m) of the Bellingshausen Sea and the Bransfield Strait in March 1987, and concentrated with a 26 μm-mesh net. Bulk microplanktonic settling volumes were assessed, silicoflagellates and large thecate dinoflagell...
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ftunibueairesbd:todo:paper_07224060_v11_n2_p103_Alder 2023-10-29T02:32:28+01:00 Microplanktonic distributional patterns west of the Antarctic Peninsula, with special emphasis on the Tintinnids Alder, V.A. Boltovskoy, D. https://hdl.handle.net/20.500.12110/paper_07224060_v11_n2_p103_Alder unknown http://hdl.handle.net/20.500.12110/paper_07224060_v11_n2_p103_Alder info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar JOUR ftunibueairesbd https://doi.org/20.500.12110/paper_07224060_v11_n2_p103_Alder 2023-10-05T01:25:20Z Microplankton was sampled with a centrifugal suction pump in the surface layer (approx. 9 m) of the Bellingshausen Sea and the Bransfield Strait in March 1987, and concentrated with a 26 μm-mesh net. Bulk microplanktonic settling volumes were assessed, silicoflagellates and large thecate dinoflagellates were counted, and tintinnids were counted and identified to species. Average (and maximum) values for the entire area surveyed were as follows, settling volume: 6.7 (43.3) ml/m3; silicoflagellates: 674 (7777) ind./l, 0.57 (6.54) mg C/m3; dinoflagellates: 109 (1321) ind./l, 1.40 (16.98) mg C/m3; tintinnids: 52 (589) ind./l, 1.15 (9.87) mg C/m3. The three geographic zones defined objectively on the basis of tintinnid specific assemblages also differed sharply in their surface salinity, overall microplanktonic abundance and bulk settling volume. The Bransfield Strait, with lowest settling volume values (2.1 ml/m3) and cell concentrations, was characterized by the dominance of Cymatocylis affinis/convallaria. In waters around the tip of the Antarctic Peninsula microplanktonic settling volumes averaged 4.6 ml/m3, cell concentrations were intermediate, and 79% of the tintinnids were represented by Codonellopsis balechi. The Bellingshausen Sea was characterized by the lowest salinities and the highest settling volumes (8.7 ml/m3) and cell counts; Laackmanniella spp. and Cymatocylis drygalskii, f. typica dominated this area. Almost all biological variables were significantly intercorrelated, and showed strong and mostly significant negative correlations with surface salinity, yet relationships between enhanced standing stock and ice meltwater were not obvious; rather, highest microplanktonic concentrations seemed to be due to ice-associated growth. Extremely high spatial correlations were found between the tintinnids and the dinoflagellates (r2: 0.941), suggesting the existence of close links between these two groups. Tintinnid species-specific assemblages show a coherent distributional pattern and well defined ... Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Bellingshausen Sea Bransfield Strait Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires) |
institution |
Open Polar |
collection |
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires) |
op_collection_id |
ftunibueairesbd |
language |
unknown |
description |
Microplankton was sampled with a centrifugal suction pump in the surface layer (approx. 9 m) of the Bellingshausen Sea and the Bransfield Strait in March 1987, and concentrated with a 26 μm-mesh net. Bulk microplanktonic settling volumes were assessed, silicoflagellates and large thecate dinoflagellates were counted, and tintinnids were counted and identified to species. Average (and maximum) values for the entire area surveyed were as follows, settling volume: 6.7 (43.3) ml/m3; silicoflagellates: 674 (7777) ind./l, 0.57 (6.54) mg C/m3; dinoflagellates: 109 (1321) ind./l, 1.40 (16.98) mg C/m3; tintinnids: 52 (589) ind./l, 1.15 (9.87) mg C/m3. The three geographic zones defined objectively on the basis of tintinnid specific assemblages also differed sharply in their surface salinity, overall microplanktonic abundance and bulk settling volume. The Bransfield Strait, with lowest settling volume values (2.1 ml/m3) and cell concentrations, was characterized by the dominance of Cymatocylis affinis/convallaria. In waters around the tip of the Antarctic Peninsula microplanktonic settling volumes averaged 4.6 ml/m3, cell concentrations were intermediate, and 79% of the tintinnids were represented by Codonellopsis balechi. The Bellingshausen Sea was characterized by the lowest salinities and the highest settling volumes (8.7 ml/m3) and cell counts; Laackmanniella spp. and Cymatocylis drygalskii, f. typica dominated this area. Almost all biological variables were significantly intercorrelated, and showed strong and mostly significant negative correlations with surface salinity, yet relationships between enhanced standing stock and ice meltwater were not obvious; rather, highest microplanktonic concentrations seemed to be due to ice-associated growth. Extremely high spatial correlations were found between the tintinnids and the dinoflagellates (r2: 0.941), suggesting the existence of close links between these two groups. Tintinnid species-specific assemblages show a coherent distributional pattern and well defined ... |
format |
Journal/Newspaper |
author |
Alder, V.A. Boltovskoy, D. |
spellingShingle |
Alder, V.A. Boltovskoy, D. Microplanktonic distributional patterns west of the Antarctic Peninsula, with special emphasis on the Tintinnids |
author_facet |
Alder, V.A. Boltovskoy, D. |
author_sort |
Alder, V.A. |
title |
Microplanktonic distributional patterns west of the Antarctic Peninsula, with special emphasis on the Tintinnids |
title_short |
Microplanktonic distributional patterns west of the Antarctic Peninsula, with special emphasis on the Tintinnids |
title_full |
Microplanktonic distributional patterns west of the Antarctic Peninsula, with special emphasis on the Tintinnids |
title_fullStr |
Microplanktonic distributional patterns west of the Antarctic Peninsula, with special emphasis on the Tintinnids |
title_full_unstemmed |
Microplanktonic distributional patterns west of the Antarctic Peninsula, with special emphasis on the Tintinnids |
title_sort |
microplanktonic distributional patterns west of the antarctic peninsula, with special emphasis on the tintinnids |
url |
https://hdl.handle.net/20.500.12110/paper_07224060_v11_n2_p103_Alder |
genre |
Antarc* Antarctic Antarctic Peninsula Bellingshausen Sea Bransfield Strait |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Bellingshausen Sea Bransfield Strait |
op_relation |
http://hdl.handle.net/20.500.12110/paper_07224060_v11_n2_p103_Alder |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar |
op_doi |
https://doi.org/20.500.12110/paper_07224060_v11_n2_p103_Alder |
_version_ |
1781053938695405568 |