Bibliothèque Tour du Valat

Se connecter

Mot de passe oublié ?
Pas encore inscrit ?

La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Détail

Ajouter au panier

Ajouter au panier

Lien vers la notice

Titre :	Submerged macrophytes as bioindicators for pollution in Lake Mariut along the Mediterranean coast of Egypt
Auteurs :	Tarek M. Galal, Auteur ; Emad A. M. Farahat, Auteur ; Manal Fawzy, Auteur
Type de document :	Article
Dans :	Ecologia Mediterranea (34 2008)
Article en page(s) :	83-91
Résumé :	The fact that Lake Mariut is the only coastal lake in Egypt with no natural connection with the Mediterranean Sea has further aggravated the situation through the accumulation of pollutants in the lake. The effect of different pollutants on the composition and distribution of submerged aquatic plant communities in Lake Mariut (Egypt) was studied. Effects of heavy metals, nitrates, nitrites and phosphorus in the water and sediments on the dry weight standing crop (DWSC) of submerged macrophytes and their spatial distributions were investigated. Seven stations (which include 20 sites) were selected to represent the different pollution sources. The species-environmental data were analyzed using Canonical Correspondence Analysis (CCA). Only five submerged macrophytes species were recorded in Lake Mariut. There was an obvious variation in the DWSC of the species according to the pollution source. Potamogeton pectinatus and Ceratophyllum demersum were the best growing species with maximum DWSC, while C. muricatum, Myriophyllum spicatum and Najas marina subap. armata were weakly growing in most stations particularly the heavily polluted ones. The CCA ordination showed that dissolved nitrite, iron, phosphate, salinity and sulphate as well as sediment copper and cadmium are the most effective variables on the DWSC of these macrophytes. C. demersum is more developed in agricultural polluted areas with high levels of water phosphate and sulphate and low levels of water and sediment copper, chromium and lead. On the other hand, P. pectinatus characterizes the industrial polluted areas, with high level of sediment cadmium and low levels of water copper and chromium. These results were discussed and compared with other related studies.

FAQ

Infos pratiques

Heures d'ouverture et contact

Lundi , mardi et jeudi de 9h à 12h et de 13h à 17h00 : ouverture au public ...

Liens utiles

A-
A
A+