Consulta: subjectFacets:"Dystrophic crisis"
Registros recuperados: 2
Data/hora: 09/06/2024 05:25:39

La "malaïgue" de l'été 1990 dans l’étang de Thau
Provedor de dados: 5
Autores: Pichot, Paul; Juge, Claude; Guillou, Jean-louis.
In summer 1990, Thau, a Mediterranean lagoon was affected by a dystrophic crisis. An aerial survey was performed to observe polluted areas. The analysis of the main environmental water conditions have shown that suspended organic matter plays an important part in the development of this dystrophic crisis.
Tipo: Text
Palavras-chave: Crise dystrophique; Oxygène; Matière organique; THAU; Méditerranée; Dystrophic crisis; Oxygen; Organic matter; Mediterranean lagoori.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00432/54333/58906.pdf

Impact of macroalgal dredging on dystrophic crises and phototrophic bacterial blooms (red waters) in a brackish coastal lagoon
Provedor de dados: 5
Autores: 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