Document Detail

Resource availability influences the diversity of a functional group of heterotrophic soil bacteria.
MedLine Citation:
PMID:  18479445     Owner:  NLM     Status:  MEDLINE    
Resource availability is a key factor regulating biodiversity and ecosystem functioning, but the relationship between resource availability and diversity has only been rarely investigated in microbial communities. The aim of this study was to determine how diversity and community structure of a functional group of soil bacteria are influenced by resource concentration. To achieve this, we used soil microcosms to investigate degradation of benzoate, which served as a model compound, by soil bacterial communities. Microcosms were supplied with (13)C-labelled benzoate at four concentrations and RNA-stable isotope probing followed by molecular fingerprinting analysis of 16S rRNA genes was employed to identify bacteria able to assimilate benzoate at different concentrations. The composition of the benzoate degrader community differed at different concentrations and there was a significant decrease in taxa evenness at the highest substrate concentration. Active organisms could be grouped into generalists, occurring at all substrate concentrations, specialists, active at one particular benzoate concentration only, and taxa that were active at either the two lowest or two highest concentrations. The study comprises the first explicit demonstration that resource availability has an effect on the diversity of a functional group of heterotrophic soil bacteria.
Silke Langenheder; James I Prosser
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-05-09
Journal Detail:
Title:  Environmental microbiology     Volume:  10     ISSN:  1462-2920     ISO Abbreviation:  Environ. Microbiol.     Publication Date:  2008 Sep 
Date Detail:
Created Date:  2008-09-12     Completed Date:  2008-10-06     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100883692     Medline TA:  Environ Microbiol     Country:  England    
Other Details:
Languages:  eng     Pagination:  2245-56     Citation Subset:  IM    
School of Biological Sciences, Department of Plant and Soil Science, University of Aberdeen, Scotland, UK.
Data Bank Information
Bank Name/Acc. No.:
GENBANK/AM932287;  AM932288;  AM932289;  AM932290;  AM932291;  AM932292;  AM932293;  AM932294;  AM932295
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MeSH Terms
Bacteria / genetics*,  metabolism
Benzoates / metabolism*
Biodegradation, Environmental
DNA Fingerprinting
Electrophoresis, Gel, Pulsed-Field
Genes, Bacterial
Genes, rRNA
Molecular Sequence Data
Population Dynamics
RNA, Bacterial / genetics
RNA, Ribosomal, 16S / genetics
Reverse Transcriptase Polymerase Chain Reaction
Sequence Alignment
Soil Microbiology*
Time Factors
Reg. No./Substance:
0/Benzoates; 0/RNA, Bacterial; 0/RNA, Ribosomal, 16S

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