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| Le Goff, Ronan; Ropert, Michel; Scolan, Pierre; Bajjouk, Touria; Liabot, Pierre Olivier; Mouquet, Pascal; Zubia, Mayalen; Cambert, Harold; Quod, Jean-pascal; Turquet, Jean. |
| Le présent document présente les travaux réalisés en 2010 dans le cadre du projet « Bio Indication à La Réunion ; contribution à la définition d’indicateur récifs coralliens à La Réunion ». Suite à la récupération et à l’analyse des données « milieu marin » déjà disponibles à La Réunion et aux premiers travaux des groupes d’experts thématiques créés dans le cadre de la mise en place de la DCE, il est apparu que les indicateurs d’état faisant le plus cruellement défaut localement étaient ceux permettant de suivre et qualifier les niveaux dystrophie se traduisant par des développements de macro algues en zone lagonaire. Décision a donc été prise de remanier profondément le projet initial ou plus précisément ses deux premiers volets « eutrophisation » et «... |
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| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00036/14741/12049.pdf |
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| Le Goff, Ronan; Ropert, Michel; Bajjouk, Touria; Bein, Aymeric; Cambert, Harold; Cebeillac, Alexandre; Cuet, Pascale; Delacourt, Christophe; Duval, Magali; Maurel, Laurence; Mouquet, Pascal; Nicet, Jean Benoit; Populus, Jacques; Quod, Jean-pascal; Talec, Pascal; Turquet, Jean; Vermenot, Coralie; Zubia, Mayalen. |
| Le présent document est le rapport final du projet "Bio-Indication à la Réunion ; contribution à la définition d’indicateurs adaptés aux platiers récifaux de la Réunion". Ce projet comprend deux volets : Volet 1 : définition d’indicateurs d’enrichissement en nutriments (dystrophie) adaptés aux platiers récifaux réunionnais. Une importante phase d’acquisition de données de terrain portant sur les algues, les cyanobactéries, le corail, la faune associée et les caractéristiques hydrologiques des différents secteurs retenus a été menée entre fin 2010 et fin 2011 sur une année hydrologique complète afin d’essayer de bâtir des indicateurs d’état DCE adaptés aux masses d’eau récifales de la Réunion, et plus précisément des indicateurs de dystrophie. Ce volet... |
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Palavras-chave: Habitats benthiques des platiers récifaux réunionnais; Indicateurs d’enrichissement en nutriments ou de dystrophie; Algues; Corail; Cartographie; Zone intertropicale; La Réunion; Océan Indien; DCE. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00209/32022/30459.pdf |
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| Le Lann, Klervi; Surget, Gwladys; Couteau, Celine; Coiffard, Laurence; Cerantola, Stephane; Gaillard, Fanny; Larnicol, Maud; Zubia, Mayalen; Guerard, Fabienne; Poupart, Nathalie; Stiger-pouvreau, Valerie. |
| The present study focused on a brown macroalga (Halidrys siliquosa), with a particular emphasis on polyphenols and their associated biological activities. Two fractions were obtained by liquid/liquid purification from a crude hydroethanolic extract: (i) an ethyl acetate fraction and (ii) an aqueous fraction. Total phenolic contents and antioxidant activities of extract and both fractions were assessed by in vitro tests (Folin-Ciocalteu test, 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity, reducing power assay, superoxide anion scavenging assay, and beta-carotene-linoleic acid system). For the most active fraction, i.e., the ethyl acetate fraction, the oxygen radical absorbance capacity (ORAC) value, antibacterial activities, and sunscreen... |
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Palavras-chave: Antioxidant; Bactericidal; Phenolic compounds; Phaeophyceae; Seaweed; ORAC value; Sunscreen potential. |
| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00366/47682/47970.pdf |
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| Réveillon, Damien; Tunin-ley, Alina; Grondin, Isabelle; Othmani, Ahlem; Zubia, Mayalen; Bunet, Robert; Turquet, Jean; Culioli, Gérald; Briand, Jean-françois. |
| Marine microalgae and cyanobacteria have largely been studied for their biotechnological potential and proved their ability to produce a wide array of bioactive molecules. We investigated the antifouling potential of unexplored benthic tropical microalgae using anti-adhesion and toxicity bioassays against two major micro- and ma crobiofoulers, namely bacteria and barnacles. Fifty strains belonging to six phyla [Cyanobacteria, Miozoa (Dinoflagellata), Bacillariophyta, Cryptophyta, Rhodophyta and Haptophyta] were isolated from southwestern Islands of the Indian Ocean. They were chosen in order to represent as much as possible the huge biodiversity of such a rich tropical ecosystem. The associated chemodiversity was highlighted by both NMR- and LC-MS-based... |
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Palavras-chave: Microalgae; Antifouling; Bioassay; Chemodiversity; Bioprospecting; Metabolomics. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00454/56608/58333.pdf |
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| Guibert, Isis; Bonnard, Isabelle; Pochon, Xavier; Zubia, Mayalen; Sidobre, Christine; Lecellier, Gael; Berteaux-lecellier, Veronique. |
| To prevent the settlement and/or the growth of fouling organisms (i.e. bacteria, fungi or microalgae), benthic sessile species have developed various defense mechanisms among which the production of chemical molecules. While studies have mostly focused on the release of chemical compounds by single species, there exist limited data on multi-species assemblages. We used an integrative approach to explore the potential interactive effects of distinct assemblages of two corals species and one giant clam species on biofouling appearance and composition. Remarkably, we found distinct biofouling communities suggesting the importance of benthic sessile assemblages in biofouling control. Moreover, the assemblage of 3 species led to an inhibition of biofouling,... |
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| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00659/77132/78488.pdf |
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| Boo, Ga Hun; Zubia, Mayalen; Hughey, Jeffery R.; Sherwood, Alison R.; Fujii, Mutue T.; Boo, Sung Min; Miller, Kathy Ann. |
| Although complete mitogenomic data have been widely applied in human and other animal population studies, they are extremely limited for florideophycean red algal populations. Gelidiella fanii is a recently described rhodophyta, previously misidentified as G. acerosa, a cosmopolitan agar-yielding species from tropical to subtropical waters. To decipher patterns in genetic diversity and geographic distribution for G. fanii, we obtained 10 complete mitogenomes including two outgroups, G. acerosa and G. flabella. The mitogenomes ranged in size from 25,223 to 25,281 bp and had 48 genes, which are similar in general structure, gene order and content, and presence of a group II intron. Phylogenomic analysis revealed that G. fanii was monophyletic and clearly... |
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Palavras-chave: Agar-yielding algae; Biogeography; Gelidiales; Haplotype lineages; Mitogenomes; Widespread species. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00654/76613/77765.pdf |
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| Stiger-pouvreau, Valerie; Zubia, Mayalen. |
| This review focuses on the diversity of French tropical overseas macroalgae and their biotechnological applications. After listing the specific diversity, i.e. 641 species in French Antilles in the Atlantic Ocean, 560 species in the Indian Ocean, and 1015 species in the South Pacific Ocean, we present the potential of their metabolites and their main uses. Among the great diversity of metabolites, we focus on carbohydrates, proteins, lipids, pigments and secondary metabolites, in particular terpenes and phenolic compounds. The main applications of reef macroalgae are described in human and animal consumptions, phycocolloids extraction, production of active ingredients for health, cosmetics, agriculture, and bioremediation. For each application, we list... |
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Palavras-chave: Biotechnological applications; Coral reef; Diversity; French territories; Seaweeds. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00605/71684/70125.pdf |
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