La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Submersed macrophyte effects on nutrient exchanges in riverine sediments
Auteurs :	C. Wigand, Auteur ; M. Finn, Auteur ; S. Findlay, Auteur ; D. Fischer, Auteur
Type de document :	Article
Dans :	Estuaries (24(3) JUN 2001)
Article en page(s) :	398-406
Résumé :	Submersed macrophytes are important in nutrient cycling in marine and lacustrine systems, although their role in nutrient exchange in tidally-influenced riverine systems is not well studied. In the laboratory, plants significantly lowered porewater nutrient pools of riverine sediments compared with bare controls. Deep-rooted Vallisneria americana lowered the porewater nutrients to a greater extent than the shallow-rooted Potamogeton pectinatus. V. americana showed significantly higher tissue nutrient content (N in roots, P in leaves) than P. pectinatus. Porewater nutrients in the river increased from spring to summer (1995) when vegetation was at its peak (for porewater PO(4)-P, p

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