Water quality assessment and application of the biological diatom index in the Kebir-East wadi, Algeria - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Accéder directement au contenu
Article Dans Une Revue African Journal of Aquatic Science Année : 2012

Water quality assessment and application of the biological diatom index in the Kebir-East wadi, Algeria

Evaluation de la qualité de l'eau dans le bassin versant Kébir Est (Algérie), et application de l'Indice Biologique Diatomées

Résumé

A total of 118 benthic diatom taxa were recorded during a survey in 2007 of the Kebir-East wadi, north-eastern Algeria. Fourteen samples were collected at seven sampling stations in winter and summer. The majority of diatom taxa comprised cosmopolitan species widely distributed along the hydrosystem. Canonical correspondence analysis, used to examine spatial patterns of diatom communities in relation to environmental gradients, was statistically highly significant (p < 0.001). The first axis accounted for 45% and the second for 22% of the total variance. Seasonal and physicochemical gradients were clearly defined and indicated the water quality. A cluster analysis was then carried out to represent the different groups of the sampled stations sharing the same flora. Agglomerative cluster analysis grouped the sampled sites into seven clusters according to the community data. For clusters gathering more than one single sample, typical diatom taxa were determined with an indicator species analysis. The reliability of the biological diatom index BDI 2007 was tested under our environmental conditions and it was concluded that considering the very particular geochemical context of this wadi, a specific diatom index should be developed.
Fichier non déposé

Dates et versions

hal-02597579 , version 1 (15-05-2020)

Identifiants

Citer

N. Chaïb, Juliette Tison-Rosebery. Water quality assessment and application of the biological diatom index in the Kebir-East wadi, Algeria. African Journal of Aquatic Science, 2012, 37 (1), pp.59-69. ⟨hal-02597579⟩

Collections

IRSTEA INRAE
7 Consultations
0 Téléchargements

Partager

Gmail Facebook X LinkedIn More