Document Detail

Effects of short-term environmental disturbances on living benthic foraminifera during the Pacific oyster summer mortality in the Marennes-Oléron Bay (France).
MedLine Citation:
PMID:  17418889     Owner:  NLM     Status:  MEDLINE    
Sediment cores were collected from April to August 2004 on tidal mudflats of the macrotidal Marennes-Oléron Bay (SW France), famous for the cultivation of Pacific oysters (Crassostrea gigas). The response of living (stained) benthic foraminifera to short-term biogeochemical disturbances in the sediment and overlying water, which may be involved in oyster summer mortality, was monitored. Short-term hypoxia occurred in early June, in conjunction with a sudden rise in temperature. In mid-June, the ammonia content of sediment porewater increased, leading to potentially maximal flux towards overlying waters. Foraminiferal assemblages, particularly in the topmost layer, were altered. Ammonia tepida was the most tolerant to temperature increase and hypoxic conditions whereas Brizalina variabilis and Haynesina germanica were sensitive to organic degradation and hypoxia. Cribroelphidium gunteri was the most opportunistic during recolonisation. Benthic foraminifera showed that short-term biochemical changes in the sediment are toxic and may be involved in the summer mortality of Pacific oysters.
Vincent M P Bouchet; Jean-Pierre Debenay; Pierre-Guy Sauriau; Joël Radford-Knoery; Patrick Soletchnik
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Publication Detail:
Type:  Journal Article     Date:  2007-02-25
Journal Detail:
Title:  Marine environmental research     Volume:  64     ISSN:  0141-1136     ISO Abbreviation:  Mar. Environ. Res.     Publication Date:  2007 Sep 
Date Detail:
Created Date:  2007-08-06     Completed Date:  2007-10-09     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9882895     Medline TA:  Mar Environ Res     Country:  England    
Other Details:
Languages:  eng     Pagination:  358-83     Citation Subset:  IM    
CRELA (UMR 6217 CNRS-IFREMER-ULR), Centre de Recherche sur les Ecosystèmes Littoraux Anthropisés, Place du Séminaire, B.P. 5, 17137, L'Houmeau, France.
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MeSH Terms
Environmental Monitoring
Ostreidae / physiology*
Population Dynamics
Seawater / chemistry*
Water Pollutants / analysis*
Zooplankton / physiology*
Reg. No./Substance:
0/Water Pollutants

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