Field observations on rare or unnoticed dinoflagellates from the Argentine Sea

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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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Autores principales: Fabro, Elena, Almandoz, Gastón O.
Formato: Artículo revista
Lenguaje:Inglés
Publicado: Sociedad Argentina de Botánica 2021
Materias:
Biogeography
dinoflagellates
diversity
Karlodinium elegans
Prorocentrum nux
South Atlantic Ocean.
Biogeografía
dinoflagelados
diversidad
Océano Atlántico Sur
Acceso en línea:https://revistas.unc.edu.ar/index.php/BSAB/article/view/31421
Aporte de:
Revistas de la UNC de Universidad Nacional de Córdoba
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record_format ojs
institution Universidad Nacional de Córdoba
institution_str I-10
repository_str R-10
container_title_str Revistas de la UNC
language Inglés
format Artículo revista
topic Biogeography
dinoflagellates
diversity
Karlodinium elegans
Prorocentrum nux
South Atlantic Ocean.
Biogeografía
dinoflagelados
diversidad
Karlodinium elegans
Océano Atlántico Sur
Prorocentrum nux
spellingShingle Biogeography
dinoflagellates
diversity
Karlodinium elegans
Prorocentrum nux
South Atlantic Ocean.
Biogeografía
dinoflagelados
diversidad
Karlodinium elegans
Océano Atlántico Sur
Prorocentrum nux
Fabro, Elena
Almandoz, Gastón O.
Field observations on rare or unnoticed dinoflagellates from the Argentine Sea
topic_facet Biogeography
dinoflagellates
diversity
Karlodinium elegans
Prorocentrum nux
South Atlantic Ocean.
Biogeografía
dinoflagelados
diversidad
Karlodinium elegans
Océano Atlántico Sur
Prorocentrum nux
author Fabro, Elena
Almandoz, Gastón O.
author_facet Fabro, Elena
Almandoz, Gastón O.
author_sort Fabro, Elena
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
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; Oxytoxumlaticeps; 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 ormoderate 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 tobe 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.
publisher Sociedad Argentina de Botánica
publishDate 2021
url https://revistas.unc.edu.ar/index.php/BSAB/article/view/31421
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first_indexed 2022-08-20T01:21:27Z
last_indexed 2022-08-20T01:21:27Z
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spelling I10-R10-article-314212021-09-02T22:00:51Z Field observations on rare or unnoticed dinoflagellates from the Argentine Sea Observaciones de campo sobre dinoflagelados raros o desconocidos en el Mar Argentino Fabro, Elena Almandoz, Gastón O. Biogeography dinoflagellates diversity Karlodinium elegans Prorocentrum nux South Atlantic Ocean. Biogeografía dinoflagelados diversidad Karlodinium elegans Océano Atlántico Sur Prorocentrum nux 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; Oxytoxumlaticeps; 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 ormoderate 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 tobe 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. Introducción y objetivos: Los dinoflagelados planctónicos son de gran relevancia en los ecosistemas marinos. Mientras que algunas especies suelen forman floraciones y ser componentes conspicuos del fitoplancton, otras se encuentran en abundancias muy bajas, lo cual hace difícil su detección. Aquí analizamos la composición y abundancia de dinoflagelados en cinco expediciones oceanográficas realizadas en aguas de la plataforma continental y del talud del Mar Argentino.M&M: La abundancia se estimó con microscopio invertido (método Utermöhl) y se utilizó microscopía óptica y electrónica de barrido para la identificación específica.Resultados: Nos enfocamos en la ocurrencia de siete dinoflagelados que previamente han sido poco documentados en ambientes marinos de todo el mundo: Dinophysis microstrigiliformis; Gyrodinium sp.; Karlodinium elegans; Oxytoxum laticeps; Peridiniella danica; Peridiniella globosa y Prorocentrum nux. Esta última especie y K.elegans se observan por primera vez en el campo desde su descripción basada en cultivos celulares. Si bien la mayoría de las especies se detectaron en abundancias bajas o moderadas, P. nux, el Prorocentrum más pequeño, alcanzó 82.000 células L-1 en aguas del talud. Células pequeñas de Gyrodinium sp. (11,5 µm de largo y 8,7 µm de ancho), con un una distribución restringida a las aguas del talud durante laprimavera, no pudieron ser asignadas con precisión a nivel específico.Conclusiones: Este estudio contribuye al conocimiento de la diversidad de dinoflagelados en el Mar Argentino y la distribución mundial de especies poco conocidas. Sociedad Argentina de Botánica 2021-06-24 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf text/html https://revistas.unc.edu.ar/index.php/BSAB/article/view/31421 Boletín de la Sociedad Argentina de Botánica (Journal of the Argentine Botanical Society; Vol. 56 No. 2 (2021): June Boletín de la Sociedad Argentina de Botánica; Vol. 56 Núm. 2 (2021): Junio Boletín de la Sociedad Argentina de Botánica; v. 56 n. 2 (2021): Junio 1851-2372 0373-580X 10.31055/1851.2372.v56.n2 eng https://revistas.unc.edu.ar/index.php/BSAB/article/view/31421/33978 https://revistas.unc.edu.ar/index.php/BSAB/article/view/31421/33980 Derechos de autor 2021 Elena Fabro, Gastón O. Almandoz https://creativecommons.org/licenses/by-nc-nd/4.0

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