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	Provedor de dados ArchiMer (2) Autor Matheron, R (2) Baulaigue, R (1) Caumette, P (1) De Wit, R (1) Guyoneaud, R (1) Palavra-chave Bacteria (1) Bactéries phototrophes (1) Crise dystophique (1) Dystrophic crisis (1) Eaux rouges (1) Ectothiorhodospira (1) Hydrogen (1) Lagoons (1) Macroalgae (1) Macroalgues (1) Milieu lagunaire (1) Photochemical reactions (1) Photochemistry (1) Phototrophic bacteria (1) Red waters (1) Mais... Tipo do documento Text (2) Ano 1998 (1) 1984 (1) País France (2) Idioma Francês (1) Inglês (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Impact of macroalgal dredging on dystrophic crises and phototrophic bacterial blooms (red waters) in a brackish coastal lagoon ArchiMer Guyoneaud, R; De Wit, R; Matheron, R; Caumette, P. The Prevost lagoon (Mediterranean coast, France), was subject to annual dystrophic crises caused by the biodegradation of opportunistic macroalgae (Ulva lactuca) in the past. These crises result in anoxic waters with subsequent blooms of Purple Sulphur Bacteria (red waters) which, by oxidizing sulphide, contribute to the reestablishment of oxic conditions in the water column. Mechanical dredging of the macroalgal biomass has been carried out in the lagoon since 1991 with the aim of preventing the ecological and economic disturbances caused by such crises. Dredging began just before the phototrophic bloom when the water was already hypoxic (O-2 = 0.7 mg . L-1) and contained sulphilde (H2S = 7.3 mg . L-1) and purple patches of phototrophic bacteria... Tipo: Text Palavras-chave: Milieu lagunaire; Macroalgues; Crise dystophique; Eaux rouges; Bactéries phototrophes; Lagoons; Macroalgae; Dystrophic crisis; Red waters; Phototrophic bacteria. Ano: 1998 URL: http://archimer.ifremer.fr/doc/00325/43658/43216.pdf Photoproduction d'hydrogene par une souche de bacteries phototrophes sulfureuses marines ArchiMer Matheron, R; Baulaigue, R. H sub(2) evolution from sulfur and organic compounds by Ectothiorhodospira) strain BA1011 has been investigated. Ectothiorhodospira strain BA1011 produces hydrogen from sulfide, thiosulfate and some organic acids such as propionate, acetate, lactate and succinate. Major characteristics are defined from sulfide: experiments show a correlation between photohydrogen production and CO sub(2) assimilation as well as an increase of the utilization of endogeneous and exogeneous organic substrates with sulfide as electron donor. Tipo: Text Palavras-chave: Ectothiorhodospira; Bacteria; Hydrogen; Photochemistry; Photochemical reactions. Ano: 1984 URL: http://archimer.ifremer.fr/doc/1984/acte-969.pdf Registros recuperados: 2 Primeira ... 1 ... Última

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