La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Effects of short-term nutrient addition on microfauna density in a Mediterranean stream
Auteurs :	R. Domenech, Auteur ; A. Gaudes, Auteur ; J. C. Lopez-Doval, Auteur ; H. Salvado, Auteur ; I. Munoz, Auteur
Type de document :	Article
Dans :	Hydrobiologia (568 SEP 2006)
Article en page(s) :	207-215
Résumé :	We performed a stream fertilisation experiment in an oligotrophic, forested, undisturbed stream by increasing nitrogen and phosphorus concentrations. The effect of nutrient loading on microfauna was studied over 6 months. A before after control impact (BACI) design was used to determine the outcome of the addition by comparing three upstream non-enriched reaches with an enriched one downstream. Ciliates such as Hymenostomata (Frontonia, Lembadion, Paramecium, Cyclidium) and Pleurostomatida (Litonotus) showed a positive response to fertilisation. No significant changes were detected for flagellates and testate amoebae. Mean density values observed (0.2-3x10(3) ind cm(-2)) were compared with those found in literature.

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