Field observations on rare or unnoticed dinoflagellates from the Argentine Sea
Background and aims: Planktonic dinoflagellates have a great ecological significance in marine environments. While some dinoflagellate species commonly reach bloom concentrations and are thus conspicuous components of marine phytoplankton, others occur in very low abundances which make them difficul...
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Sociedad Argentina de Botánica
2021
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ftdoajarticles:oai:doaj.org/article:e1b80d90b02e49ad9bf5bc224f6d0fa1 2023-05-15T18:21:11+02:00 Field observations on rare or unnoticed dinoflagellates from the Argentine Sea Elena Fabro Gastón O. Almandoz 2021-06-01T00:00:00Z https://doaj.org/article/e1b80d90b02e49ad9bf5bc224f6d0fa1 EN ES PT eng spa por Sociedad Argentina de Botánica https://revistas-demo.psi.unc.edu.ar/index.php/BSAB/article/view/31421 https://doaj.org/toc/0373-580X https://doaj.org/toc/1851-2372 0373-580X 1851-2372 https://doaj.org/article/e1b80d90b02e49ad9bf5bc224f6d0fa1 Boletín de la Sociedad Argentina de Botánica, Vol 56, Iss 2 (2021) Biogeography dinoflagellates diversity Karlodinium elegans Prorocentrum nux South Atlantic Ocean Science Q Botany QK1-989 article 2021 ftdoajarticles 2022-12-31T04:53:00Z Background and aims: Planktonic dinoflagellates have a great ecological significance in marine environments. While some dinoflagellate species commonly reach bloom concentrations and are thus conspicuous components of marine phytoplankton, others occur in very low abundances which make them difficult to detect in field studies. Here we analyzed dinoflagellate composition and abundance in five oceanographic expeditions carried out in continental shelf and slope waters of the Argentine Sea. M&M: Plankton abundance was estimated by the Utermöhl method, using inverted microscopy, whereas further optical and scanning electron microscopy was applied for the identification of dinoflagellate species. Results: We focused on the occurrence of seven dinoflagellates that have been previously poorly documented or overlooked in marine environments worldwide: Dinophysis microstrigiliformis; Gyrodinium sp.; Karlodinium elegans; Oxytoxum laticeps; Peridiniella danica; Peridiniella globosa and Prorocentrum nux. The latest and K. elegans are observed for the first time in field conditions after their original descriptions based on cell cultures. While most species were detected in low or moderate abundances, P. nux, which is the smallest Prorocentrum species, reached 82,000 cells L-1 in slope waters. Very small Gyrodinium cells (11.5 µm long; 8.7 µm wide) with a distribution restricted to slope waters during spring, were not possible to be accurately assigned to a species. Conclusions: This study contributes to the understanding of dinoflagellate diversity in the Argentine Sea and the worldwide distribution of little known species. Article in Journal/Newspaper South Atlantic Ocean Directory of Open Access Journals: DOAJ Articles Argentine |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English Spanish Portuguese |
topic |
Biogeography dinoflagellates diversity Karlodinium elegans Prorocentrum nux South Atlantic Ocean Science Q Botany QK1-989 |
spellingShingle |
Biogeography dinoflagellates diversity Karlodinium elegans Prorocentrum nux South Atlantic Ocean Science Q Botany QK1-989 Elena Fabro Gastón O. Almandoz Field observations on rare or unnoticed dinoflagellates from the Argentine Sea |
topic_facet |
Biogeography dinoflagellates diversity Karlodinium elegans Prorocentrum nux South Atlantic Ocean Science Q Botany QK1-989 |
description |
Background and aims: Planktonic dinoflagellates have a great ecological significance in marine environments. While some dinoflagellate species commonly reach bloom concentrations and are thus conspicuous components of marine phytoplankton, others occur in very low abundances which make them difficult to detect in field studies. Here we analyzed dinoflagellate composition and abundance in five oceanographic expeditions carried out in continental shelf and slope waters of the Argentine Sea. M&M: Plankton abundance was estimated by the Utermöhl method, using inverted microscopy, whereas further optical and scanning electron microscopy was applied for the identification of dinoflagellate species. Results: We focused on the occurrence of seven dinoflagellates that have been previously poorly documented or overlooked in marine environments worldwide: Dinophysis microstrigiliformis; Gyrodinium sp.; Karlodinium elegans; Oxytoxum laticeps; Peridiniella danica; Peridiniella globosa and Prorocentrum nux. The latest and K. elegans are observed for the first time in field conditions after their original descriptions based on cell cultures. While most species were detected in low or moderate abundances, P. nux, which is the smallest Prorocentrum species, reached 82,000 cells L-1 in slope waters. Very small Gyrodinium cells (11.5 µm long; 8.7 µm wide) with a distribution restricted to slope waters during spring, were not possible to be accurately assigned to a species. Conclusions: This study contributes to the understanding of dinoflagellate diversity in the Argentine Sea and the worldwide distribution of little known species. |
format |
Article in Journal/Newspaper |
author |
Elena Fabro Gastón O. Almandoz |
author_facet |
Elena Fabro Gastón O. Almandoz |
author_sort |
Elena Fabro |
title |
Field observations on rare or unnoticed dinoflagellates from the Argentine Sea |
title_short |
Field observations on rare or unnoticed dinoflagellates from the Argentine Sea |
title_full |
Field observations on rare or unnoticed dinoflagellates from the Argentine Sea |
title_fullStr |
Field observations on rare or unnoticed dinoflagellates from the Argentine Sea |
title_full_unstemmed |
Field observations on rare or unnoticed dinoflagellates from the Argentine Sea |
title_sort |
field observations on rare or unnoticed dinoflagellates from the argentine sea |
publisher |
Sociedad Argentina de Botánica |
publishDate |
2021 |
url |
https://doaj.org/article/e1b80d90b02e49ad9bf5bc224f6d0fa1 |
geographic |
Argentine |
geographic_facet |
Argentine |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_source |
Boletín de la Sociedad Argentina de Botánica, Vol 56, Iss 2 (2021) |
op_relation |
https://revistas-demo.psi.unc.edu.ar/index.php/BSAB/article/view/31421 https://doaj.org/toc/0373-580X https://doaj.org/toc/1851-2372 0373-580X 1851-2372 https://doaj.org/article/e1b80d90b02e49ad9bf5bc224f6d0fa1 |
_version_ |
1766200318538809344 |