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	Provedor de dados ArchiMer (3) Autor Ferrier-pages, Christine (3) Fine, Maoz (3) Grover, Renaud (3) Maguer, Jean-francois (3) Bednarz, Vanessa N. (2) Ezzat, Leila (1) Pupier, Chloe A. (1) Mais... Palavra-chave Ammonium (1) Carbon isotopes (1) Clades (1) Diazotrophs (1) Dinitrogen fixation (1) Light acclimation (1) Mesophotic coral (1) Nitrate (1) Nitrogen isotopes (1) Red Sea (1) Scleractinian coral (1) Scleractinian corals (1) Soft corals (1) Mais... Tipo do documento Text (3) Ano 2019 (1) 2017 (2) País France (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Carbon and Nitrogen Acquisition in Shallow and Deep Holobionts of the Scleractinian Coral S. pistillata ArchiMer Ezzat, Leila; Fine, Maoz; Maguer, Jean-francois; Grover, Renaud; Ferrier-pages, Christine. Reef building corals can host different symbiont genotypes (clades), and form distinct holobionts in response to environmental changes. Studies on the functional significance of genetically different symbionts have focused on the thermal tolerance rather than on the nutritional significance. Here, we characterized the nitrogen and carbon assimilation rates, the allocation patterns of these nutrients within the symbiosis, and the trophic condition of two distinct holobionts of Stylophora pistillata: one associated with Symbiodinium Glade A in shallow reefs and the other one associated with Glade C in mesophotic reefs. The main findings are that: (1) Glade C-symbionts have a competitive advantage for the acquisition of carbon at low irradiance compared to... Tipo: Text Palavras-chave: Light acclimation; Carbon isotopes; Nitrogen isotopes; Clades; Nitrate; Ammonium; Scleractinian coral; Mesophotic coral. Ano: 2017 URL: https://archimer.ifremer.fr/doc/00602/71414/69897.pdf Divergent Capacity of Scleractinian and Soft Corals to Assimilate and Transfer Diazotrophically Derived Nitrogen to the Reef Environment ArchiMer Pupier, Chloe A.; Bednarz, Vanessa N.; Grover, Renaud; Fine, Maoz; Maguer, Jean-francois; Ferrier-pages, Christine. Corals are associated with dinitrogen (N-2)-fixing bacteria that potentially represent an additional nitrogen (N) source for the coral holobiont in oligotrophic reef environments. Nevertheless, the few studies investigating the assimilation of diazotrophically derived nitrogen (DDN) by tropical corals are limited to a single scleractinian species (i.e., Stylophora pistillata). The present study quantified DDN assimilation rates in four scleractinian and three soft coral species from the shallow waters of the oligotrophic Northern Red Sea using the N-15(2) tracer technique. All scleractinian species significantly stimulated N, fixation in the coral-surrounding seawater (and mucus) and assimilated DDN into their tissue. Interestingly, N-2 fixation was not... Tipo: Text Palavras-chave: Dinitrogen fixation; Diazotrophs; Scleractinian corals; Soft corals; Red Sea. Ano: 2019 URL: https://archimer.ifremer.fr/doc/00512/62370/66644.pdf The Assimilation of Diazotroph-Derived Nitrogen by Scleractinian Corals Depends on Their Metabolic Status ArchiMer Bednarz, Vanessa N.; Grover, Renaud; Maguer, Jean-francois; Fine, Maoz; Ferrier-pages, Christine. Tropical corals are associated with a diverse community of dinitrogen (N-2)-fixing prokaryotes (diazotrophs) providing the coral an additional source of bioavailable nitrogen (N) in oligotrophic waters. The overall activity of these diazotrophs changes depending on the current environmental conditions, but to what extent it affects the assimilation of diazotroph-derived N (DDN) by corals is still unknown. Here, in a series of N-15(2) tracer experiments, we directly quantified DDN assimilation by scleractinian corals from the Red Sea exposed to different environmental conditions. We show that DDN assimilation strongly varied with the corals ' metabolic status or with phosphate availability in the water. The very autotrophic shallow-water (similar to 5 m)... Tipo: Text Ano: 2017 URL: https://archimer.ifremer.fr/doc/00616/72832/72319.pdf Registros recuperados: 3 Primeira ... 1 ... Última

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