Bioindication using vegetation of three regulated rivers under agr-industrial pressure in western France - Institut Agro Rennes-Angers Accéder directement au contenu
Article Dans Une Revue Annali di Botanica Année : 2004

Bioindication using vegetation of three regulated rivers under agr-industrial pressure in western France

Ivan I. Bernez
Julie Coudreuse
Jacques J. Haury
Didier Le Coeur

Résumé

The longitudinal changes of richness and composition of aquatic plants have been studied from headwaters to the fifth stream order in three near-by rivers of Western Brittany (France), the Orne, Sélune and Rance. All rivers were regulated years ago with dams located on the lower third of the studies river stretches. A shifting evolution of the macrophyte richness was revealed in a previous study along the river continuum, related to habitat heterogeneity, influences of regulated sectors and geological changes. Nutrient enrichment and organic pollution influences were the main secondary gradients. On this basis we improved a methodology to complete a biotic index used in Europe for water trophy assessment, following the European water frame work directive, the IBMR based on aquatic plant survey: a validation with classical statistical tests and a comparison to a canonical analysis were performed. Finally this approach permitted to make a proposition of adaptation of the index to the local particularities of each three high anthropised rivers.
Fichier non déposé

Dates et versions

hal-01453628 , version 1 (02-02-2017)

Identifiants

  • HAL Id : hal-01453628 , version 1
  • PRODINRA : 14110

Citer

Ivan I. Bernez, Julie Coudreuse, Hervé Daniel, Jacques J. Haury, Didier Le Coeur. Bioindication using vegetation of three regulated rivers under agr-industrial pressure in western France. Annali di Botanica, 2004, 4, pp.9-18. ⟨hal-01453628⟩
246 Consultations
0 Téléchargements

Partager

Gmail Facebook X LinkedIn More