Species occurrence of the potentially toxigenic diatom genus <i>Pseudo-nitzschia</i> and the associated neurotoxin domoic acid in the Argentine Sea

The marine diatom genus <i>Pseudo-nitzschia</i>, the major known producer of the neurotoxin domoic acid (DA) responsible for the amnesic shellfish poisoning (ASP) syndrome in humans and marine mammals, is globally distributed. The genus presents high species richness in the Argentine Sea...

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Autores principales:	Almandoz, Gastón Osvaldo, Fabro Cerreia Fus, Elena Inés, Ferrario, Martha Elba, Tillmann, Urban, Cembella, Allan, Krock, Bernd
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2017
Materias:	Ciencias Naturales amnesic shellfish poisoning South-western Atlantic Pseudo-nitzschia diversity P. australis P. brasiliana domoic acid
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/109416 https://www.sciencedirect.com/science/article/abs/pii/S156898831630316X
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-109416
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Ciencias Naturales amnesic shellfish poisoning South-western Atlantic Pseudo-nitzschia diversity P. australis P. brasiliana domoic acid
spellingShingle	Ciencias Naturales amnesic shellfish poisoning South-western Atlantic Pseudo-nitzschia diversity P. australis P. brasiliana domoic acid Almandoz, Gastón Osvaldo Fabro Cerreia Fus, Elena Inés Ferrario, Martha Elba Tillmann, Urban Cembella, Allan Krock, Bernd Species occurrence of the potentially toxigenic diatom genus <i>Pseudo-nitzschia</i> and the associated neurotoxin domoic acid in the Argentine Sea
topic_facet	Ciencias Naturales amnesic shellfish poisoning South-western Atlantic Pseudo-nitzschia diversity P. australis P. brasiliana domoic acid
description	The marine diatom genus <i>Pseudo-nitzschia</i>, the major known producer of the neurotoxin domoic acid (DA) responsible for the amnesic shellfish poisoning (ASP) syndrome in humans and marine mammals, is globally distributed. The genus presents high species richness in the Argentine Sea and DA has been frequently detected in the last few years in plankton and shellfish samples, but the species identity of the producers remains unclear. In the present work, the distribution and abundance of <i>Pseudo-nitzschia</i> species and DA were determined from samples collected on two oceanographic cruises carried out through the Argentine Sea (⁓39–47ºS) during summer and spring 2013. Phytoplankton composition was analysed by light and electron microscopy while DA was determined by liquid chromatography coupled to tandem mass spectrometry (LC–MS/MS). The genus <i>Pseudo-nitzschia</i> was recorded in 71 and 86% of samples collected in summer and spring, respectively, whereas DA was detected in only 42 and 21% of samples, respectively. Microscopic analyses revealed at least five potentially toxic species (<i>P. australis</i>, <i>P. brasiliana</i>, <i>P. fraudulenta</i>, <i>P. pungens</i>, <i>P. turgidula</i>), plus putatively non-toxigenic <i>P. dolorosa</i>, <i>P. lineola</i>, <i>P. turgiduloides</i> and unidentified specimens of the <i>P. pseudodelicatissima</i> complex. The species <i>P. australis</i> showed the highest correlation with DA occurrence (r = 0.55; p < 0.05), suggesting its importance as a major DA producer in the Argentine Sea. In the northern area and during summer, DA was associated with the presence of <i>P. brasiliana</i>, a species recorded for the first time in the Argentine Sea. By contrast, high concentrations of <i>P. fraudulenta</i>, <i>P. pungens</i> and <i>P. turgidula</i> did not correspond with DA occurrence. This study represents the first successful attempt to link toxigenicity with <i>Pseudo-nitzschia</i> diversity and cell abundance in field plankton populations in the south-western Atlantic.
format	Articulo Articulo
author	Almandoz, Gastón Osvaldo Fabro Cerreia Fus, Elena Inés Ferrario, Martha Elba Tillmann, Urban Cembella, Allan Krock, Bernd
author_facet	Almandoz, Gastón Osvaldo Fabro Cerreia Fus, Elena Inés Ferrario, Martha Elba Tillmann, Urban Cembella, Allan Krock, Bernd
author_sort	Almandoz, Gastón Osvaldo
title	Species occurrence of the potentially toxigenic diatom genus <i>Pseudo-nitzschia</i> and the associated neurotoxin domoic acid in the Argentine Sea
title_short	Species occurrence of the potentially toxigenic diatom genus <i>Pseudo-nitzschia</i> and the associated neurotoxin domoic acid in the Argentine Sea
title_full	Species occurrence of the potentially toxigenic diatom genus <i>Pseudo-nitzschia</i> and the associated neurotoxin domoic acid in the Argentine Sea
title_fullStr	Species occurrence of the potentially toxigenic diatom genus <i>Pseudo-nitzschia</i> and the associated neurotoxin domoic acid in the Argentine Sea
title_full_unstemmed	Species occurrence of the potentially toxigenic diatom genus <i>Pseudo-nitzschia</i> and the associated neurotoxin domoic acid in the Argentine Sea
title_sort	species occurrence of the potentially toxigenic diatom genus <i>pseudo-nitzschia</i> and the associated neurotoxin domoic acid in the argentine sea
publishDate	2017
url	http://sedici.unlp.edu.ar/handle/10915/109416 https://www.sciencedirect.com/science/article/abs/pii/S156898831630316X
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Species occurrence of the potentially toxigenic diatom genus <i>Pseudo-nitzschia</i> and the associated neurotoxin domoic acid in the Argentine Sea

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