| Effect of a transient perturbation on marine bacterial communities with contrasting history. | |
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MedLine Citation:
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PMID: 20337764 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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AIMS: To evaluate the importance of the bacterial composition on the resilience of the organic matter assimilation in the sea. METHODS AND RESULTS: Chemostats were inoculated with coastal and offshore bacterial communities. Bacterial density and protein synthesis increased before stabilizing, and this response to confinement was more marked in the offshore chemostats. Before the toluene perturbation the community structure in the coastal chemostats remained complex whereas the offshore chemostats became dominated by Alteromonas sp. After the perturbation, bacterial protein synthesis was inhibited before peaking briefly at a level fivefold to that observed before the perturbation and then stabilizing at a level comparable to that before the perturbation. Alteromonas dominated both the coastal and the offshore communities immediately after the perturbation and the coastal communities did not recover their initial complexity. CONCLUSIONS: Cell lysis induced by the toluene perturbation favoured the growth of Alteromonas which could initiate growth rapidly in response to the nutrient pulse. Despite their different community structure in situ, the resilience of protein synthesis of coastal and offshore bacterial communities was dependent on Alteromonas, which dominated in the chemostats. SIGNIFICANCE AND IMPACT OF THE STUDY: Here we show that although Alteromonas sp. dominated in artificial offshore and coastal communities in chemostats, their response time to the shock was different. This suggests that future perturbation studies on resilience in the marine environment should take account of ecosystem history. |
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Authors:
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O Zemb; N West; M Bourrain; J J Godon; P Lebaron |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of applied microbiology Volume: 109 ISSN: 1365-2672 ISO Abbreviation: J. Appl. Microbiol. Publication Date: 2010 Sep |
Date Detail:
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Created Date: 2010-11-05 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9706280 Medline TA: J Appl Microbiol Country: England |
Other Details:
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Languages: eng Pagination: 751-62 Citation Subset: IM |
Copyright Information:
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© 2010 The Authors. Journal compilation © 2010 The Society for Applied Microbiology. |
Affiliation:
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Université Pierre et Marie Curie-Paris 6, Laboratoire ARAGO, Banyuls-sur-Mer, France. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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