Data/hora: 01/06/2024 04:29:31

Provedor de dados: | 5
País: | France
Título: | Preliminary biological characterization of the Saldanha hydrothermal field at the Mid-Atlantic Ridge (36 degrees 34 ' N, 32 degrees 26 ' W, 2200 m)
Autores: | Biscoito, M; Almeida, A; Segonzac, Michel.
Data: | 2006-12
Ano: | 2006
Palavras-chave: | New records; Antimora; Acanthonus; Fish; Sponge; Bathyal megafauna; Gastropoda; Fauna assemblage; Mid Atlantic Ridge; Hydrothermal vents.
Resumo: | A preliminary description of the biology of the Saldanha hydrothermal field in the Mid-Atlantic Ridge (36 degrees 34'N, 32 degrees 26'W, 2200 m) is given, based on direct observation, video images and samples. Venting occurs mainly in a diffuse way through sediment, but hydrothermal fluid discharges are visible through centimeter-long orifices, scattered on the sediment, over an area of approximately 400 m(2), at depths between 2,200 and 2,220 metres. Emitted fluids are transparent, with a temperature of 7-9 degrees C. An almost complete absence of macro- and megafauna around the venting orifices was found. The only vent invertebrate identified was the gastropod Phymorhynchus sp., with only two juvenile specimens caught. A careful examination of the images taken at these orifices showed bacteria-like filaments undulating with fluid discharge. At the level of the benthic bathyal megafauna the dominant species seemed to be the sponge Cinachyra sp. (Demospongiae, Spirophorida, Tetillidae). At least 4 species of fish are new records from the area.
Tipo: | Text
Idioma: | Inglês
Identificador: | http://archimer.ifremer.fr/doc/2006/publication-3610.pdf
Editor: | Station Biologique de Roscoff
Relação: | http://archimer.ifremer.fr/doc/00000/3610/
Formato: | application/pdf
Fonte: | Cahiers de Biologie Marine (0007-9723) (Station Biologique de Roscoff), 2006-12 , Vol. 47 , N. 4 , P. 421-427
Fonte: | 2006 Station Biologique de Roscoff