Linked Life Data

12957915

Source:http://linkedlifedata.com/resource/pubmed/id/12957915

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
9
pubmed:dateCreated
2003-9-5
pubmed:abstractText
Despite the recognition that viruses are ubiquitous components of aquatic ecosystems, the number of studies on viral abundance and the ecological role of viruses in sediments is scarce. In this investigation, the interactions between viruses and bacteria were studied in the oxygenated silty sediment layer of a mesotrophic oxbow lake. A long-term study (13 months) and a diel study revealed that viruses are a numerically important and dynamic component of the microbial community. The abundance and decay rates ranged from 4.3 x 10(9) to 7.2 x 10(9) particles ml of wet sediment(-1) and from undetectable to 22.2 x 10(7) particles ml(-1) h(-1), respectively, and on average the values were 2 orders of magnitude higher than the values for the overlying water. In contrast to our expectations, viruses did not contribute significantly to the bacterial mortality in the sediment, since on average only 6% (range, 0 to 25%) of the bacterial secondary production was controlled by viruses. The low impact of viruses on the bacterial community may be associated with the quantitatively low viral burden that benthic bacteria have to cope with compared to the viral burden with which bacterial assemblages in the water column are confronted. The virus-to-bacterium ratio of the sediment varied between 0.9 and 3.2, compared to a range of 5.0 to 12.4 obtained for the water column. We speculate that despite high numbers of potential hosts, the possibility of encountering a host cell is limited by the physical conditions in the sediment, which is therefore not a favorable environment for viral proliferation. Our data suggest that viruses do not play an important role in the processing and transfer of bacterial carbon in the oxygenated sediment layer of the environment investigated.
pubmed:commentsCorrections
http://linkedlifedata.com/resource/pubmed/commentcorrection/12957915-10704475, http://linkedlifedata.com/resource/pubmed/commentcorrection/12957915-10788350, http://linkedlifedata.com/resource/pubmed/commentcorrection/12957915-11157214, http://linkedlifedata.com/resource/pubmed/commentcorrection/12957915-11872504, http://linkedlifedata.com/resource/pubmed/commentcorrection/12957915-11916670, http://linkedlifedata.com/resource/pubmed/commentcorrection/12957915-12023730, http://linkedlifedata.com/resource/pubmed/commentcorrection/12957915-12089035, http://linkedlifedata.com/resource/pubmed/commentcorrection/12957915-4004211, http://linkedlifedata.com/resource/pubmed/commentcorrection/12957915-6247974, http://linkedlifedata.com/resource/pubmed/commentcorrection/12957915-6257161, http://linkedlifedata.com/resource/pubmed/commentcorrection/12957915-6258475, http://linkedlifedata.com/resource/pubmed/commentcorrection/12957915-8480998, http://linkedlifedata.com/resource/pubmed/commentcorrection/12957915-9251197
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0099-2240
pubmed:author
pubmed:issnType
Print
pubmed:volume
69
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
5281-9
pubmed:dateRevised
2010-9-14
pubmed:meshHeading
pubmed:year
2003
pubmed:articleTitle
Does virus-induced lysis contribute significantly to bacterial mortality in the oxygenated sediment layer of shallow oxbow lakes?
pubmed:affiliation
Institute of Medical Biology, Research Group General Microbiology, University of Vienna, 1090 Vienna, Austria.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't