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| Ody, Anouck; Thibaut, Thierry; Berline, Léo; Changeux, Thomas; André, Jean-michel; Chevalier, Cristèle; Blanfuné, Aurélie; Blanchot, Jean; Ruitton, Sandrine; Stiger-pouvreau, Valerie; Connan, Solène; Grelet, Jacques; Aurelle, Didier; Guéné, Mathilde; Bataille, Hubert; Bachelier, Celine; Guillemain, Dorian; Schmidt, Natascha; Fauvelle, Vincent; Guasco, Sophie; Ménard, Frédéric. |
| The present study reports on observations carried out in the Tropical North Atlantic in summer and autumn 2017, documenting Sargassum aggregations using both ship-deck observations and satellite sensor observations at three resolutions (MSI-10 m, OLCI-300 m, VIIRS-750 m and MODIS-1 km). Both datasets reported that in summer, Sargassum aggregations were mainly observed off Brazil and near the Caribbean Islands, while they accumulated near the African coast in autumn. Based on in situ observations, we propose a five-class typology allowing standardisation of the description of in situ Sargassum raft shapes and sizes. The most commonly observed Sargassum raft type was windrows, but large rafts composed of a quasi-circular patch hundreds of meters wide were... |
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| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00514/62609/66969.pdf |
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| Garrabou, Joaquim; Gómez-gras, Daniel; Ledoux, Jean-baptiste; Linares, Cristina; Bensoussan, Nathaniel; López-sendino, Paula; Bazairi, Hocein; Espinosa, Free; Ramdani, Mohamed; Grimes, Samir; Benabdi, Mouloud; Souissi, Jamila Ben; Soufi, Emna; Khamassi, Faten; Ghanem, Raouia; Ocaña, Oscar; Ramos-esplà, Alfonso; Izquierdo, Andres; Anton, Irene; Rubio-portillo, Esther; Barbera, Carmen; Cebrian, Emma; Marbà, Nuria; Hendriks, Iris E.; Duarte, Carlos M.; Deudero, Salud; Díaz, David; Vázquez-luis, Maite; Alvarez, Elvira; Hereu, Bernat; Kersting, Diego K.; Gori, Andrea; Viladrich, Núria; Sartoretto, Stephane; Pairaud, Ivane; Ruitton, Sandrine; Pergent, Gérard; Pergent-martini, Christine; Rouanet, Elodie; Teixidó, Nuria; Gattuso, Jean-pierre; Fraschetti, Simonetta; Rivetti, Irene; Azzurro, Ernesto; Cerrano, Carlo; Ponti, Massimo; Turicchia, Eva; Bavestrello, Giorgio; Cattaneo-vietti, Riccardo; Bo, Marzia; Bertolino, Marco; Montefalcone, Monica; Chimienti, Giovanni; Grech, Daniele; Rilov, Gil; Tuney Kizilkaya, Inci; Kizilkaya, Zafer; Eda Topçu, Nur; Gerovasileiou, Vasilis; Sini, Maria; Bakran-petricioli, Tatjana; Kipson, Silvija; Harmelin, Jean G.. |
| Tipo: Text |
Palavras-chave: Climate change; Ocean warming; Marine heat wave impacts; Marine disease; Marine conservation and protection. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00592/70448/68557.pdf |
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| Cresson, Pierre; Ruitton, Sandrine; Ourgaud, Melanie; Harmelin-vivien, Mireille. |
| A large complex of artificial reefs was deployed in the Bay of Marseilles, North-Western Mediterranean, for the enhancement of commercial fisheries stocks. Carbon and nitrogen stable isotope and stomach content analyses were performed on 23 fish species collected on the artificial reefs to assess their trophic position and feeding behaviour. Results indicated that fish diets were not modified on the artificial reefs compared to natural environments, nor was the structure of their trophic network. Artificial reefs, with their complex design, provide diverse and abundant food sources for fishes. Ranges of delta C-13 and delta N-15 of artificial reef fishes were comparable to those recorded in natural Mediterranean environments, with a similar trophic... |
| Tipo: Text |
Palavras-chave: Artificial reefs; Fish diet; NW Mediterranean; Stable isotopes; Stomach content; Trophic level. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00186/29708/28188.pdf |
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| Pergent-martini, Christine; Alami, S; Bonacorsi, Marina; Clabaut, Philippe; Daniel, Boris; Ruitton, Sandrine; Sartoretto, Stephane; Pergent, Gerard. |
| A new coralligenous morphotype named ‘atolls’ was discovered in 2011 in northern Cap Corse (Western Mediterranean Sea). With the aim of inventorying and characterizing these structures, and to attempt to shed light on their origins, two oceanographic campaigns (using e.g. side scan sonar, multibeam echosounder, sparker, ROV and submarine with 3D photogrammetry) were carried out in 2013 and 2014, in this sector, and in the south of the island in search of similar structures. Off Cap Corse, nearly one thousand atolls were identified between 105 and 130 m depth; the majority of them are situated between 110 and 125 m depth. These atolls are generally grouped (several tens to several hundred) and are to be found in two main sectors, situated between 22 and 31... |
| Tipo: Text |
Palavras-chave: Coralligenous; Atolls; Rhodoliths; Corsica. |
| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00272/38365/36670.pdf |
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| Belloni, Bruno; Sartoretto, Stephane; Cresson, Pierre; Bouchoucha, Marc; Guillou, Gael; Lebreton, Benoit; Ruitton, Sandrine; Harmelin-vivien, Mireille. |
| The coralligenous ecosystem is one of the biodiversity hotspots in the Mediterranean Sea. This study aims at determining (i) the organic matter (OM) sources at the base of the food web in a coralligenous ecosystem near Marseille (Cap Caveau, Frioul Island) and (ii) the global functional structure of its community. For that purpose, C and N stable isotope analyses were performed on 78 compartments or species collected in this habitat between 30 and 40 m depth. Results suggested that the pelagic particulate organic matter (POM), mainly composed of phytoplankton, was the main OM source fuelling coralligenous food webs, followed by sedimented organic matter (SOM) and some macrophytes. At least three level of consumers were identified from... |
| Tipo: Text |
Palavras-chave: Food webs; Coralligenous ecosystem; Stable isotopes; Carbon; Nitrogen. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00483/59511/62396.pdf |
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| Cresson, Pierre; Ruitton, Sandrine; Harmelin-vivien, Mireille. |
| Suspension-feeders predominate in the vast majority of the coastal marine benthic ecosystems, with several species co-occurring at low spatial scale. Understanding how these species cope with competition for trophic resources has been the core of numerous studies, mostly in coastal shallow systems where food supplies are diverse and abundant. Oligotrophic systems have received less attention. The aim of the present study was thus to investigate the trophic relationships established between 9 suspension feeders collected in an oligotrophic zone (Bay of Marseille, French Mediterranean). Species displayed similar isotopic ratios, consistently with the use of one main source, identified as nanophytoplankton and diazotrophic bacteria as the δ15N values were... |
| Tipo: Text |
Palavras-chave: Suspension feeders; Isotopic niche; Mediterranean; Oligotrophy; Resource sharing mechanisms. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00301/41203/40363.pdf |
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