Contribution of Heterotrophic Bacterial Production to the Carbon Budget of the River Seine (France) Author(s): Pierre Servais and Josette Garnier Source: Microbial Ecology, Vol. 25, No. 1 (Jan. - Feb., 1993), pp. 19-33 Published by: Springer Stable URL: http://www.jstor.org/stable/4251279 Accessed: 14/04/2010 07:56 Your use of the JSTOR archive indicates your acceptance of JSTOR's Terms and Conditions of Use, available at http://www.jstor.org/page/info/about/policies/terms.jsp. JSTOR's Terms and Conditions of Use provides, in part, that unless you have obtained prior permission, you may not download an entire issue of a journal or multiple copies of articles, and you may use content in the JSTOR archive only for your personal, non-commercial use. Please contact the publisher regarding any further use of this work. Publisher contact information may be obtained at http://www.jstor.org/action/showPublisher?publisherCode=springer. Each copy of any part of a JSTOR transmission must contain the same copyright notice that appears on the screen or printed page of such transmission. JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact
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MicrobEcol (1993) 25:19-33
MICROBIAL ECOLOGY New YorkInc. C)1993 Springer-Verlag
Contributionof HeterotrophicBacterial Production to the Carbon Budget of the River Seine (France) PierreServais' and JosetteGamier"2 'UniversitdLibrede Bruxelles,Groupede Microbiologiedes MilieuxAquatiques,Campusde la Plaine,CP 221, boulevarddu Triomphe,B-1050 Bruxelles,Belgium;and2 UA 1367 CNRS Laboratoirede GeologieAppliqueeTour26, 5 eme etage, 4 place JussieuF-75005Paris,France Received: June 2, 1992; Revised: August 24, 1992
Abstract. Bacterialactivitywas measuredin theriverSeineby two methods, into DNA and3H-leucineincorporation into pro3H-thymidineincorporation teins. Both incorporationrates are characterizedby low values upstreamof Paris,a largeincreasejust downstreamof the outfallof the Acherestreatment planteffluents,and thendecreasingvaluesfurtherdownstream.The covariation of both activitiesis demonstratedby the constancyof the molar ratio (leucine to thymidineincorporationrate) in the range of 6 to 8 for all the samples,exceptin the perturbedareawhereit is higher(15 to 35). Thesehigh valuesof molarratioarelinkedto the introductionintothe riverof largesized bacteria(: 1 m) withhigherincorporation ratespercell or biomassunitthan the smallautochthonous bacteria(
