Effects of small-scale turbulence on dinoflagellate ecophysiology

Effects of small-scale turbulence on dinoflagellate ecophysiology

Directora de tesis: Dra. Elisa Berdalet (Institut de Ciències del Mar, CSIC, Barcelona).Tesis defendida en Barcelona el 20 de Noviembre de 2009. Excelente cum laude por unanimidad. Los capítulos de la tesi 1, 4, 5 y 6 han sido publicados como artículos científicos en revistas del SCI entre los años 2007 y 2011

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Main Author: Llaveria, Gisela
Format: tesis doctoral biblioteca
Language:English
Published: 2009-11
Subjects:Dinoflagellates, Small-scale turbulence, Alexandrium minutum, Alexandrium catenella, PSP toxins, Ecdysal cysts, DMSP, Dinomitosis, Parvilucifera sinerae, PSP,
Online Access:http://hdl.handle.net/10261/40987
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spelling dig-icm-es-10261-409872020-11-19T10:36:59Z Effects of small-scale turbulence on dinoflagellate ecophysiology Llaveria, Gisela Dinoflagellates Small-scale turbulence Alexandrium minutum Alexandrium catenella PSP toxins Ecdysal cysts DMSP Dinomitosis Parvilucifera sinerae PSP Directora de tesis: Dra. Elisa Berdalet (Institut de Ciències del Mar, CSIC, Barcelona).Tesis defendida en Barcelona el 20 de Noviembre de 2009. Excelente cum laude por unanimidad. Los capítulos de la tesi 1, 4, 5 y 6 han sido publicados como artículos científicos en revistas del SCI entre los años 2007 y 2011 Dinoflagellate proliferations seem to be often related to certain stability of the water column. Laboratory experiments have shown that small-scale turbulence can diminish the net growth rate and inhibit cell division, and simultaneously increase the cell size and the DNA and RNA content. The objective of this PhD Thesis was to explore direct effects of small-scale turbulence on physiological processes related to the cell and life cycles of dinoflagellates, and to investigate the underlying mechanisms in the observed responses. The gained knowledge should provide a better understanding of the development of their proliferations. The cell cycle of the dinoflagellate Alexandrium minutum was transiently arrested in the G2/M phase. It was explored whether such interference was due to an eventual alteration, due to turbulence, of the microtubular system implicated in the dinomitosis, whether ryanodine receptors were involved in the mechanotransduction pathway activated by this stimulus, and also whether a possible differential gene expression occurred under turbulence. Toxins and DMSP concentrations, the proportion of ecdysal cyst and the endoparasite Parvilucifera sinerae infection on dinoflagellates were also modulated by turbulence. Namely, infectivity decreased under shaking, and likely, asexual encystment did not constitute a preventive mechanism to infection. The suitability of some experimental systems for turbulence generation was also considerate. The orbital shaker is the most appropriate setup to carry out physiological studies on dinoflagellates, since the whole culture is exposed to turbulence, and cells cannot escape it. The present Thesis concludes that dinoflagellates prefer calm water column situations, since their physiology is sensitive to intense mixing Spanish projects: TURFI (REN2002-01591/MAR), TURDITOX (CTM2005-03547/MAR), TURECOTOX (CTM2006-13884-C02-00/MAR) VARITEC (CTM2004-04442-C02). G. Llaveria fue becaria FPU del MICINN (2004-2008) 2011-10-11T14:42:39Z 2011-10-11T14:42:39Z 2009-11 tesis doctoral http://purl.org/coar/resource_type/c_db06 http://hdl.handle.net/10261/40987 en open
institution ICM ES
collection DSpace
country España
countrycode ES
component Bibliográfico
access En linea
databasecode dig-icm-es
tag biblioteca
region Europa del Sur
libraryname Biblioteca del ICM España
language English
topic Dinoflagellates
Small-scale turbulence
Alexandrium minutum
Alexandrium catenella
PSP toxins
Ecdysal cysts
DMSP
Dinomitosis
Parvilucifera sinerae
PSP
Dinoflagellates
Small-scale turbulence
Alexandrium minutum
Alexandrium catenella
PSP toxins
Ecdysal cysts
DMSP
Dinomitosis
Parvilucifera sinerae
PSP
spellingShingle Dinoflagellates
Small-scale turbulence
Alexandrium minutum
Alexandrium catenella
PSP toxins
Ecdysal cysts
DMSP
Dinomitosis
Parvilucifera sinerae
PSP
Dinoflagellates
Small-scale turbulence
Alexandrium minutum
Alexandrium catenella
PSP toxins
Ecdysal cysts
DMSP
Dinomitosis
Parvilucifera sinerae
PSP
Llaveria, Gisela
Effects of small-scale turbulence on dinoflagellate ecophysiology
description Directora de tesis: Dra. Elisa Berdalet (Institut de Ciències del Mar, CSIC, Barcelona).Tesis defendida en Barcelona el 20 de Noviembre de 2009. Excelente cum laude por unanimidad. Los capítulos de la tesi 1, 4, 5 y 6 han sido publicados como artículos científicos en revistas del SCI entre los años 2007 y 2011
format tesis doctoral
topic_facet Dinoflagellates
Small-scale turbulence
Alexandrium minutum
Alexandrium catenella
PSP toxins
Ecdysal cysts
DMSP
Dinomitosis
Parvilucifera sinerae
PSP
author Llaveria, Gisela
author_facet Llaveria, Gisela
author_sort Llaveria, Gisela
title Effects of small-scale turbulence on dinoflagellate ecophysiology
title_short Effects of small-scale turbulence on dinoflagellate ecophysiology
title_full Effects of small-scale turbulence on dinoflagellate ecophysiology
title_fullStr Effects of small-scale turbulence on dinoflagellate ecophysiology
title_full_unstemmed Effects of small-scale turbulence on dinoflagellate ecophysiology
title_sort effects of small-scale turbulence on dinoflagellate ecophysiology
publishDate 2009-11
url http://hdl.handle.net/10261/40987
work_keys_str_mv AT llaveriagisela effectsofsmallscaleturbulenceondinoflagellateecophysiology
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