Download Consulta: creatorFacets:"Guillou, Laure" Registros recuperados: 6

Consulta: creatorFacets:"Guillou, Laure"
Registros recuperados: 6
Data/hora: 08/06/2017 18:10:34
Étude sur la prolifération de la micro algue Alexandrium minutum en rade de Brest
Provedor de dados: 5
Autores: Chapelle, Annie; Le Bec, Claude; Amzil, Zouher; Dreanno, Catherine; Guillou, Laure; Klouch, Khadidja; Labry, Claire;
Le Gac, Mickael; Pineau-guillou, Lucia; Siano, Raffaele; Abernot, Chantal; Andrieux, Francoise; Caradec, Florian; Destombe,
Christophe; Dia, A.; Doner, Anne; Duval, Julia; Gouriou, Jeremie; Lazure, Pascal; Le Brun, Luc; Le Gal, Dominique; Malestroit,
Pascale; Petton, Sebastien; Plus, Martin; Quere, Julien; Savar, Veronique; Schmitt, Sophie; Terre, A.; Youenou, Agnes.
Suite à l’événement de grande ampleur d’efflorescence d’Alexandrium minutum et des toxicités associées en Rade de Brest en
2012, un projet a été élaboré avec la Région Bretagne dans le cadre du développement du port de Brest. L’Ifremer a organisé un
échantillonnage dans l’estuaire de la rivière de Daoulas, zone la plus touchée en 2012, au cours des printemps-été 2013 et 2014.
Un suivi de la présence d’A. minutum dans les sédiments a également été réalisé en hiver 2014. De ces suivis, des mesures
réalisées au laboratoire à ce jour, des simulations du modèle Prévimer ainsi que des résultats du réseau Rephy et Velyger, il ressort
que: * La rade de Brest peut aujourd’hui être considérée comme une zone à risque pour Alexandrium minutum. En effet, depuis
2012...
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00254/36487/35029.pdf
Marine protist diversity in European coastal waters and sediments as revealed by high-throughput
sequencing
Provedor de dados: 5
Autores: Massana, Ramon; Gobet, Angelique; Audic, Stephane; Bass, David; Bittner, Lucie; Boutte, Christophe; Chambouvet,
Aurelie; Christen, Richard; Claverie, Jean-michel; Decelle, Johan; Dolan, John R.; Dunthorn, Micah; Edvardsen, Bente; Forn,
Irene; Forster, Dominik; Guillou, Laure; Jaillon, Olivier; Kooistra, Wiebe H. C. F.; Logares, Ramiro; Mahe, Frederic; Not,
Fabrice; Ogata, Hiroyuki; Pawlowski, Jan; Pernice, Massimo C.; Probert, Ian; Romac, Sarah; Richards, Thomas; Santini,
Sebastien; Shalchian-tabrizi, Kamran; Siano, Raffaele; Simon, Nathalie; Stoeck, Thorsten; Vaulot, Daniel; Zingone, Adriana; De
Vargas, Colomban.
Although protists are critical components of marine ecosystems, they are still poorly characterized. Here we analysed the
taxonomic diversity of planktonic and benthic protist communities collected in six distant European coastal sites. Environmental
deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) from three size fractions (pico-, nano- and micro/mesoplankton), as
well as from dissolved DNA and surface sediments were used as templates for tag pyrosequencing of the V4 region of the 18S
ribosomal
DNA.
Beta-diversity
analyses
split
the
protist
community
structure
into
three
main
clusters:
picoplankton-nanoplankton-dissolved DNA, micro/mesoplankton and sediments. Within each cluster, protist communities from
the same site and time clustered together,...
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00275/38594/37190.pdf
Phylogenetic and morphological characterisation of the green algae infecting blue mussel Mytilus
edulis in the North and South Atlantic oceans
Provedor de dados: 5
Autores: Rodriguez, Francisco; Feist, Stephen; Guillou, Laure; Harkestad, Lisbeth; Bateman, Kelly; Renault, Tristan; Mortensen,
Stein.
Blue mussels Mytilus edulis with shell deformations and green pustules containing parasitic algae were collected at 3 coastal sites
(Burøy, Norway; Bockholm, Denmark; Goose Green, Falkland Islands). A comparative study, including mussel histopathology,
algal morphology, ultrastructure and phylogenetic position was performed. Green pustules were mainly located in the posterior
portion of the mantle and gonad tissues and the posterior adductor muscle. Electron microscopy confirmed the presence of algal
cells with similar morphology to Coccomyxa parasitica. Algae were oval shaped with a single nucleus and chloroplast, 1 or 2
mitochondria and a dense granular cytoplasm with a lipid inclusion body, Golgi apparatus and small vesicles. Partial small subunit
(SSU)...
Tipo: Text
Palavras-chave: Phylogeny; Parasitic alga; Mytilus edulis chilensis; Mytilus edulis; Coccomyxa parasitica; Blue mussels.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4581.pdf
Significance of Plankton Community Structure and Nutrient Availability for the Control of
Dinoflagellate Blooms by Parasites: A Modeling Approach
Provedor de dados: 5
Autores: Alves-de-souza, Catharina; Pecqueur, David; Le Floc'H, Emilie; Mas, Sebastien; Roques, Cecile; Mostajir, Behzad;
Vidussi, Franscesca; Velo-suarez, Lourdes; Sourisseau, Marc; Fouilland, Eric; Guillou, Laure.
Dinoflagellate blooms are frequently observed under temporary eutrophication of coastal waters after heavy rains. Growth of
these opportunistic microalgae is believed to be promoted by sudden input of nutrients and the absence or inefficiency of their
natural enemies, such as grazers and parasites. Here, numerical simulations indicate that increasing nutrient availability not only
promotes the formation of dinoflagellate blooms but can also stimulate their control by protozoan parasites. Moreover, high
abundance of phytoplankton other than dinoflagellate hosts might have a significant dilution effect on the control of dinoflagellate
blooms by parasites, either by resource competition with dinoflagellates (thus limiting the number of hosts available for...
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00274/38478/36938.pdf
The parasitic dinoflagellates Blastodinium spp. inhabiting the gut of marine, planktonic copepods:
morphology, ecology, and unrecognized species diversity
Provedor de dados: 5
Autores: Skovgaard, Alf; Karpov, Sergey A.; Guillou, Laure.
Blastodinium is a genus of dinoflagellates that live as parasites in the gut of marine, planktonic copepods in theWorld’s oceans
and coastal waters. The taxonomy, phylogeny, and physiology of the genus have only been explored to a limited degree and,
based on recent investigations, we hypothesize that the morphological and genetic diversity within this genus may be considerably
larger than presently recognized. To address these issues, we obtained 18S rDNA and ITS gene sequences for Blastodinium
specimens of different geographical origins, including representatives of the type species. This genetic information was in some
cases complemented with new morphological, ultrastructural, physiological, and ecological data. Because most current knowledge
about...
Tipo: Text
Palavras-chave: Blastodinium; Copepod; Parasite; Symbiont; Plankton; Uttrastructure; Phylogeny.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00133/24407/22401.pdf
The Protist Ribosomal Reference database (PR2): a catalog of unicellular eukaryote Small Sub-Unit
rRNA sequences with curated taxonomy
Provedor de dados: 5
Autores: Guillou, Laure; Bachar, Dipankar; Audic, S; Bass, David; Berney, Cedric; Bittner, Lucie; Boutte, Christophe; Burgaud,
Gaetan; De Vargas, Colomban; Decelle, Johan; Del Campo, Javier; Dolan, John R.; Dunthorn, Micah; Edvardsen, Bente;
Holzmann, Maria; Kooistra, Wiebe H. C. F.; Lara, Enrique; Le Bescot, Noan; Logares, Ramiro; Mahe, F; Massana, Ramon;
Montresor, Marina; Morard, Raphael; Not, Fabrice; Pawlowski, Jan; Probert, Ian; Sauvadet, Anne-laure; Siano, Raffaele; Stoeck,
Thorsten; Vaulot, Daniel; Zimmermann, Pascal; Christen, Richard.
The interrogation of genetic markers in environmental meta-barcoding studies is currently seriously hindered by the lack of
taxonomically curated reference data sets for the targeted genes. The Protist Ribosomal Reference database (PR2, http://ssurrna.
org/) provides a unique access to eukaryotic small sub-unit (SSU) ribosomal RNA and DNA sequences, with curated taxonomy.
The database mainly consists of nuclear-encoded protistan sequences. However, metazoans, land plants, macrosporic fungi and
eukaryotic organelles (mitochondrion, plastid and others) are also included because they are useful for the analysis of
hightroughput sequencing data sets. Introns and putative chimeric sequences have been also carefully checked. Taxonomic
assignation of sequences...
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00114/22492/20174.pdf