Document Detail


Bacterial colonization on fecal pellets of harpacticoid copepods and on their diatom food.
MedLine Citation:
PMID:  20440489     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Fecal pellets make up a significant fraction of the global flux of organic matter in oceans, and the associated bacterial communities in particular are a potential food source for marine organisms. However, these communities remain largely unknown. In the present study, the bacterial communities on fecal pellets of the benthic copepod Paramphiascella fulvofasciata feeding on the diatoms Navicula phyllepta and Seminavis robusta were analyzed. The aim of this study was to characterize the bacterial communities associated with the diatoms and the fecal pellets by means of DGGE profiling. Furthermore, isolated bacteria were characterized by means of partial 16S rRNA gene sequencing. The composition of the bacterial microflora on fecal pellets was studied in terms of the effect of the original food source, the age of the fecal pellets and the copepod's identity. Alphaproteobacteria, Flavobacteria, and Bacilli were found on the fecal pellets; whereas on diatoms, exclusively Gammaproteobacteria were identified. Especially after eating N. phyllepta, there was an important increase in bacterial diversity, although the diatom N. phyllepta harbored a less diverse bacterial community than S. robusta. Our data suggest that the additional bacteria originate from the copepod's digestive tract and largely depends on the initial food source.
Authors:
Marleen De Troch; Clio Cnudde; Anne Willems; Tom Moens; Ann Vanreusel
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-05-04
Journal Detail:
Title:  Microbial ecology     Volume:  60     ISSN:  1432-184X     ISO Abbreviation:  Microb. Ecol.     Publication Date:  2010 Oct 
Date Detail:
Created Date:  2010-10-14     Completed Date:  2011-01-19     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7500663     Medline TA:  Microb Ecol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  581-91     Citation Subset:  IM    
Affiliation:
Biology Department, Marine Biology, Ghent University, Campus Sterre, Krijgslaan 281-S8, 9000 Ghent, Belgium. marleen.detroch@UGent.be
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MeSH Terms
Descriptor/Qualifier:
Animals
Bacteria / classification,  genetics*,  growth & development
Copepoda / microbiology*
DNA, Bacterial / genetics
Denaturing Gradient Gel Electrophoresis
Diatoms / microbiology*
Feces / microbiology*
Phylogeny
RNA, Ribosomal, 16S / genetics
Seawater / microbiology
Sequence Analysis, DNA
Water Microbiology*
Chemical
Reg. No./Substance:
0/DNA, Bacterial; 0/RNA, Ribosomal, 16S

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


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