Evolution de la végétation de la plaine alluviale des Grands Plans au Valsorey (2460 m, Bourg-Saint-Pierre, Valais) = The evolution of the vegetation of the alluvial plain of the Grands Plans in the Valsorey (2460 m, Bourg-Saint-Pierre, Valais)

Détails

ID Serval
serval:BIB_4556
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Evolution de la végétation de la plaine alluviale des Grands Plans au Valsorey (2460 m, Bourg-Saint-Pierre, Valais) = The evolution of the vegetation of the alluvial plain of the Grands Plans in the Valsorey (2460 m, Bourg-Saint-Pierre, Valais)
Périodique
Bulletin de la Société Vaudoise des Sciences Naturelles
Auteur(s)
Droz J., Maire S., Hainard P.
ISSN
0037-9603
Statut éditorial
Publié
Date de publication
1996
Volume
84
Numéro
1
Pages
33-48
Langue
français
Résumé
The alluvial plain of the Grands Plans (Valais'Alps, Switzerland) is located at 2460 m high. It rests on a substratum which contains a variable amount of bases. A great number of small rivers shift their course on this biotope. This is the reason why floods periodically arise. These are the main causes of the vegetation's dynamic. The vegetation is composed of a patchwork of specialized groupments, within them the rare Caricion bicolori-atrofuscae. The alluvial plain's vegetation is well known because of old studies, the oldest one goes back to 1920. The aim of the present work is to analyze the evolution of the vegetation. It shows that this vegetal patchwork is more a continuum than the sum of really distinct vegetation's units. The pieces of this patchwork are moving all the time on the plain and don't really change their composition. The relictual species of the Caricion bicolori-atrofuscae, like Carex bicolor, are increasing their status on the plain. It confirms that they are the best adapted to the local ecological conditions.
Mots-clé
Population dynamics , Alpine vegetation , Alluvial plain , Geographic distribution , Topography , Ecological abundance , Ecological zonation , Time variation , Switzerland , Europe , Cyperaceae , Monocotyledones , Angiospermae , Spermatophyta ,
Création de la notice
19/11/2007 11:24
Dernière modification de la notice
03/03/2018 16:45
Données d'usage