Document Detail

Effects of diesel and interactions with copper and other metals in an estuarine sediment microbial community.
MedLine Citation:
PMID:  19580335     Owner:  NLM     Status:  In-Data-Review    
Estuarine sediment microcosms were treated with combinations of diesel, copper (at two levels), and a mixture of heavy metals (mercury, cadmium, lead, and chromium; at two levels) mimicking the contaminant loadings found in harbor sediments. The effects on the microbial community were monitored by polar lipid fatty acid analysis. Diesel addition increased microbial biomass, caused shifts in some fatty acid structural groups, and decreased starvation biomarkers. Incorporation of diesel hydrocarbons into lipids was expressed as an increase in the proportion of odd-carbon-number fatty acids. No treatment with the metals mixture (mercury, cadmium, lead, and chromium) alone significantly changed any parameter derived from the polar lipid fatty acids, but the increase in microbial biomass from diesel addition was higher with the metals mixture, possibly because of indirect effects caused by reductions in grazing resulting from metal-induced toxicity to bacteriovorous nematodes. Copper also modified the effects of diesel addition, preventing biomass increase but not diesel degradation, suggesting that some of the energy gained from diesel oxidation was expended combating copper toxicity. In the present study, observations indicate that metals in general, and copper in particular, can modify the response of sedimentary microorganisms to petroleum-hydrocarbon contaminants.
David B Hedrick; Aaron D Peacock; Guglielmo Tita; John W Fleeger; Kevin R Carman; David C White
Related Documents :
18571185 - Chiral separation of amino acids and glycyl dipeptides by chiral ligand-exchange capill...
23891835 - Manipulation of culture conditions alters lipid content and fatty acid profiles of a wi...
24886955 - Direct synthesis of formic acid from carbon dioxide by hydrogenation in acidic media.
9430675 - Fluorescence studies of exchangeable apolipoprotein-lipid interactions. superficial ass...
6533895 - Peracetic acid for reuse of hemodialyzers clinical studies.
16233545 - Conversion of isoeugenol into vanillic acid by pseudomonas putida i58 cells exhibiting ...
Publication Detail:
Type:  Journal Article     Date:  2009-07-06
Journal Detail:
Title:  Environmental toxicology and chemistry / SETAC     Volume:  28     ISSN:  0730-7268     ISO Abbreviation:  Environ. Toxicol. Chem.     Publication Date:  2009 Nov 
Date Detail:
Created Date:  2009-10-20     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8308958     Medline TA:  Environ Toxicol Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2289-97     Citation Subset:  IM    
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Structure-dependent charge density as a determinant of antimicrobial activity of Peptide analogues o...
Next Document:  Factors affecting the degradation of pharmaceuticals in agricultural soils.