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Differences in consumption of allochthonous DOC under limnic and estuarine conditions in a watershed
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för molekylärbiologi (Teknisk-naturvetenskaplig fakultet). Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå marina forskningscentrum (UMF). (Johan Wikner ; UMFpub)
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för molekylärbiologi (Teknisk-naturvetenskaplig fakultet). (Johan Wikner)
1999 (engelsk)Inngår i: Aquatic Microbial Ecology, ISSN 0948-3055, E-ISSN 1616-1564, Vol. 17, nr 3, s. 289-299Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

A temporal study of the bacterial utilisation of allochthonous dissolved organic carbon (DOC) was performed in a lake and estuary situated in the same boreal watershed. A greater utilisation of allochthonous DOC was observed under estuarine as compared to Limnic conditions. However, the bacterial biomass yield was not significantly different between the environments, indicating a lower growth efficiency on allochthonous DOC by the estuarine bacterioplankton. The largest fraction of the allochthonous DOC utilised (20 %) was observed under estuarine conditions and coincided with the spring flood. The utilisation of allochthonous DOC and bacterial biomass yield in the experimental bottles was Limited by the availability of nitrogen or phosphorus in both environments. Our results showed that the major bacterial transformation of DOC occurred in the estuarine rather than the Limnic environment, due to the shift in physicochemical milieu and bacterial assemblage. However, the estuarine bacteria also respired a greater fraction of the DOC utilised than their limnic counterparts.

sted, utgiver, år, opplag, sider
Oldendorf: Inter-Research , 1999. Vol. 17, nr 3, s. 289-299
Emneord [en]
river, limnic, marine, organic carbon, bacteria, seasonal, utilisation, growth efficiency
HSV kategori
Forskningsprogram
mikrobiologi
Identifikatorer
URN: urn:nbn:se:umu:diva-52549DOI: 10.3354/ame017289ISI: 000081379300009OAI: oai:DiVA.org:umu-52549DiVA, id: diva2:506346
Tilgjengelig fra: 2012-02-28 Laget: 2012-02-24 Sist oppdatert: 2018-06-08

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