La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Water quality variation and clam growth: Is pH really a non-issue in estuaries?
Auteurs :	A. H. Ringwood, Auteur ; C. J. Keppler, Auteur
Type de document :	Article
Dans :	Estuaries (25(5) OCT 2002)
Article en page(s) :	901-907
Résumé :	A tandem deployment system was used to critically evaluate relationships between important water chemistry parameters (pH, salinity, dissolved oxygen) and biotic performance based on clam growth. The effects of environmental conditions on growth of juvenile clams, Mercenaria mercenatia, were determined after 7-day field deployments in cages at reference sites from 1998 to 2000. Continuous measurements of the overlying water chemistry parameters were monitored by deploying an in situ water quality instrument (Hydrolab Datasonde) at the same time. While salinity was identified as an important determinant of clam growth over wide salinity ranges (10-35parts per thousand), pH was also found to be a very important parameter, especially in low-salinity regimes (

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