Article (Scientific journals)
Links between bacterial communities in marine sediments and trace metal geochemistry as measured by in situ DET/DGT approaches
Gillan, David; Baeyens, Willy; Bechara, Rafeh et al.
2012In Marine Pollution Bulletin, 64, p. 353-362
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Keywords :
[en] Sediment; [en] Bacteria; [en] Biomass; [en] Metals; [en] Diversity; [en] Porewater
Abstract :
[en] Our current view about the relationship between metals and bacteria in marine sediments might be biased because most studies only use ex situ approaches to quantify metals. The aim of the present research was to compare ex situ and in situ methods of metal measurement (DET and DGT - Diffusive Equilibration or Diffusive Gradients in Thin-films) and relate the results with two commonly used microbiological variables (bacterial biomass and bacterial diversity as revealed by DGGE). No previous studies have used such in situ approaches in microbial ecology. For biomass and most of the investigated trace metals (Ag, Cd, Sn, Cr, Ni, Cu, Pb, Al) no significant correlations were found. The exceptions were Fe, Mn, Co and As which behave like micronutrients. For bacterial diversity, no relevant relationships were found. We conclude that in situ methods are more adapted tools for microbial ecologists but that ex situ approaches are still necessary.
Disciplines :
Phytobiology (plant sciences, forestry, mycology...)
Zoology
Earth sciences & physical geography
Author, co-author :
Gillan, David ;  Université de Mons > Faculté des Sciences > Protéomie et Microbiologie
Baeyens, Willy
Bechara, Rafeh
Billon, Gabriel
Denis, Kevin 
Grosjean, Philippe  ;  Université de Mons > Faculté des Sciences > Service d'Ecologie numérique
Leermakers, Martine
Lesven, Ludovic
Pede, Annelies
Sabbe, Koen
Gao, Yue
Language :
English
Title :
Links between bacterial communities in marine sediments and trace metal geochemistry as measured by in situ DET/DGT approaches
Publication date :
26 January 2012
Journal title :
Marine Pollution Bulletin
ISSN :
0025-326X
Publisher :
Elsevier, United Kingdom
Volume :
64
Pages :
353-362
Peer reviewed :
Peer Reviewed verified by ORBi
Research unit :
S807 - Ecologie numérique
S828 - Protéomie et Microbiologie
Research institute :
R100 - Institut des Biosciences
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