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Growth dynamics within bacterial communities in riverine and estuarine batch cultures
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för molekylärbiologi (Teknisk-naturvetenskaplig fakultet). (Johan Wikner)
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2004 (engelsk)Inngår i: Aquatic Microbial Ecology, ISSN 0948-3055, E-ISSN 1616-1564, Vol. 37, nr 2, s. 137-148Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

We investigated temporal changes in community composition of bacteria growing on riverine dissolved organic carbon. Batch cultures were adjusted to riverine or estuarine salinity levels and inoculated with bacteria from these 2 environments to test whether growth patterns of bacterial taxa are influenced by salinity and/or the source of the inoculum. Changes in bacterial community composition at different stages of the growth phase were studied by 16S rDNA denaturing gradient gel electrophoresis (DGGE). Furthermore, the growth dynamics of 7 bacteria previously isolated from the estuary were followed by quantitative DNA-DNA hybridization. Growth dynamics within bacterial communities were significantly influenced by the source of the inoculum but not by salinity, suggesting that slight changes in salinity, to which riverine bacteria are exposed when discharged into the Northern Baltic Sea, are not a major regulating factor of community dynamics. Additionally, our results indicated only minor differences in the appearance and growth of bacteria when examined by quantitative DNA-DNA hybridization, whereas DGGE banding patterns suggested that there were fast- and slow-growing types of bacteria.

sted, utgiver, år, opplag, sider
2004. Vol. 37, nr 2, s. 137-148
Emneord [en]
heterotrophic bacteria, growth dynamics, batch cultures, DGGE, DNA-DNA, hybridization
HSV kategori
Identifikatorer
URN: urn:nbn:se:umu:diva-52542DOI: 10.3354/ame037137ISI: 000225503700003OAI: oai:DiVA.org:umu-52542DiVA, id: diva2:506320
Tilgjengelig fra: 2012-02-28 Laget: 2012-02-24 Sist oppdatert: 2018-06-08

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