La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Microplankton metabolism along a trophic gradient in a shallow-temperate estuary
Auteurs :	M. Revilla, Auteur ; A. Ansotegui, Auteur ; A. Iriarte, Auteur ; I. Madariaga, Auteur ; E. Orive, Auteur ; A. Sarobe, Auteur ; J. M. Trigueros, Auteur
Type de document :	Article
Dans :	Estuaries (25(1) FEB 2002)
Article en page(s) :	6-18
Résumé :	Microplankton metabolism was studied in the Urdaibai estuary from June 1996 to May 1997 to investigate the factors that control the autotrophic-heterotrophic balance in three zones of contrasting trophic status. Gross primary production (GPP) and dark oxygen consumption (R) were measured from the upper eutrophic reaches to the lower marine segment for unfractionated samples as well as for nanoplankton ( I only dining peak values of production, whilst in the middle estuary they were almost always greater than or equal to 1. Ultraplankton was generally heterotrophic in the three zones. The relative importance of the

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