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  Effects of deposition of heavy-metal-polluted harbor mud on microbial diversity and metal resistance in sandy marine sediments

Toes, A. C. M., Finke, N., Kuenen, J. G., & Muyzer, G. (2008). Effects of deposition of heavy-metal-polluted harbor mud on microbial diversity and metal resistance in sandy marine sediments. Archives of Environmental Contamination and Toxicology, 55(3), 372-385.

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Toes, A. C. M., Author
Finke, N.1, Author           
Kuenen, J. G., Author
Muyzer, G.2, Author           
Affiliations:
1Department of Biogeochemistry, Max Planck Institute for Marine Microbiology, Max Planck Society, ou_2481693              
2Department of Molecular Ecology, Max Planck Institute for Marine Microbiology, Max Planck Society, ou_2481696              

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 Abstract: Deposition of dredged harbor sediments in relatively undisturbed ecosystems is often considered a viable option for confinement of pollutants and possible natural attenuation. This study investigated the effects of deposition of heavy-metal-polluted sludge on the microbial diversity of sandy sediments during 12 months of mesocosm incubation. Geochemical analyses showed an initial increase in pore-water metal concentrations, which subsided after 3 months of incubation. No influence of the deposited sediment was observed in denaturing gradient gel electrophoresis (DGGE) profiles of bacterial 16S rRNA genes, whereas a minor, transient impact on the archaeal community was revealed. Phylogenetic analyses of bacterial 16S rRNA clone libraries showed an abundance of members of the Flavobacteriaceae, the α- and γ-Proteobacteria, in both the muddy and the sandy sediments. Despite the finding that some groups of clones were shared between the metal-impacted sandy sediment and the harbor control, comparative analyses showed that the two sediments were significantly different in community composition. Consequences of redeposition of metal-polluted sediment were primarily underlined with cultivation-dependent techniques. Toxicity tests showed that the percentage of Cd- and Cu-tolerant aerobic heterotrophs was highest among isolates from the sandy sediment with metal-polluted mud on top.

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Language(s): eng - English
 Dates: 2008-02-142008-10
 Publication Status: Issued
 Pages: 14
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 421150
ISI: 000259191700004
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Title: Archives of Environmental Contamination and Toxicology
  Other : Arch. Environ. Contam. Toxicol.
Source Genre: Journal
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Publ. Info: New York : Springer
Pages: - Volume / Issue: 55 (3) Sequence Number: - Start / End Page: 372 - 385 Identifier: ISSN: 0090-4341
CoNE: https://pure.mpg.de/cone/journals/resource/954925461128