Community dynamics over a decadal scale at Logatchev, 14 degrees 45 ' N, Mid-Atlantic Ridge

Type Article
Date 2010
Language English
Author(s) Gebruk Andrey1, Fabri Marie-ClaireORCID2, Briand Patrick2, Desbruyeres Daniel2
Affiliation(s) 1 : Russian Acad Sci, PP Shirshov Oceanol Inst, Moscow 117997, Russia.
2 : Ifremer Brest, Dept Etud Ecosyst Profonds, F-29280 Plouzane, France.
Meeting 4th International Symposium on Chemosynthesis-Based Ecosystems - Hydrothermal Vents, Seeps and Other Reducing Habitats, Nago, JAPAN, JUN 29-JUL 03, 2009
Source Cahiers De Biologie Marine (0007-9723) (Station biologique de Roscoff), 2010 , Vol. 51 , N. 4 , P. 383-388
WOS© Times Cited 16
Keyword(s) Hydrothermal vent, Community dynamics, Succession, Phymorchynchus, Bathymodiolus puteoserpentis, Vesicomyids, Logatchev, Mid-Atlantic Ridge
Abstract Hydrothermal vent community dynamics over a ten year span was studied in the Logatchev area, 14 degrees 45'N on the Mid-Atlantic Ridge. On the SERPENTINE cruise in March 2007 with the RN Pourquoi pas? and the ROV Victor 6000 (IFREMER), composition, abundance and distribution of dominant megafauna at Logatchev were examined and compared to published data from 1997. Our results revealed notable changes in several community characteristics. The most significant changes evident in March 2007 compared to July 1997 were the increase up to by order of magnitude in the population density of predatory gastropods Phymorchynchus spp. at the site Irina-2 and disappearance of a live population of vesicomyids at the site Anya's Garden. Other notable differences between the two periods of observation were the overall increase in the abundance in 2007 of the mussel Bathymodiolus puteoserpentis and a high abundance of gravid females of the shrimp Rimicaris exoculata at Irina-2. It is suggested that the extinction of vesicomyids occurred owing to either a sediment slide at a steep slope of the Anya's Garden locality or instability of a biotope required for vesicomyids. Live vesicomyids were not found over a large area explored at Logatchev in 2007. Other changes observed in 2007 apparently were related to seasonal fluctuations in the community at Logatchev or fluctuations in the hydrothermal activity. Any successional stages over a decadal scale at Logatchev were not observed.
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Gebruk Andrey, Fabri Marie-Claire, Briand Patrick, Desbruyeres Daniel (2010). Community dynamics over a decadal scale at Logatchev, 14 degrees 45 ' N, Mid-Atlantic Ridge. Cahiers De Biologie Marine, 51(4), 383-388. Open Access version :