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Hyporheic biofilm development on artificial substrata, as a tool for assessing trophic status of aquatic systems : first results

Published online by Cambridge University Press:  01 February 2009

C. Claret
C. Claret*
Affiliation:
Université de Savoie, GRETI (et ESA-CNRS 5023, Villeurbanne), F - 73376 Le Bourget du Lac, France
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Abstract

To determine the relationship between biofilm characteristics and organic nutrient content, we investigated the development of hyporheic biofilms on artificial substrata (glass slides) in the early phase of bacterial colonization (one week) in contrasting river habitats with significantly different concentrations of dissolved organic carbon (DOC) and biodegradable and refractory DOC (BDOC and RDOC). Results suggest that the quality of DOC (i.e. BDOC versus RDOC content) controlled electron -transport system (ETS)-active bacterial abundances early in colonization, while DOC concentrations limit biofilm development onlyin the latter phase of colonization.

Keywords

interstitial waterDOCbacterial countsETS-active bacteriaeau interstitielleCODdénombrements bactériensbactéries à STE actif
Type
Research Article
Information
Annales de Limnologie - International Journal of Limnology , Volume 34 , Issue 2 , June 1998 , pp. 119 - 128
Copyright
© Université Paul Sabatier, 1998

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