Table of Contents
Advances in Botany
Volume 2015, Article ID 651369, 13 pages
http://dx.doi.org/10.1155/2015/651369
Research Article

Contribution to the Macrophytic Typology of Belgian Reference Watercourses

1Département de l’Étude du Milieu Naturel et Agricole (DEMNA), Direction Générale de l’Agriculture, des Ressources Naturelles et de l’Environnement, Service Public de Wallonie, avenue Maréchal Juin 23, 5030 Gembloux, Belgium
2Département des Sciences et Gestion de l’Environnement, Université de Liège, avenue de Longwy 185, 6700 Arlon, Belgium

Received 28 October 2014; Accepted 3 February 2015

Academic Editor: Baohong Zhang

Copyright © 2015 Daniel Galoux et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The objective of the study is to create a typology of macrophytes for the reference watercourses of the Meuse River catchment basin in Wallonia as a step towards the implementation of the European Water Framework Directive. The 50 sites studied are the object of a physicochemical and environmental characterization followed by a floristic survey (phanerogams, mosses, liverworts, and macroalgae). Six clusters of watercourses with their characteristic species are highlighted by two-way clustering and indicator species. The abundance of phanerogams in some watercourses of the Arden region is not only linked to light intensity but also depends on the degree of slope and the nature of the geological substrate.