Un biotope hydrobiologique remarquable: Les laurons de la Crau (Bouches-du-Rhône, France). La communauté animale et ses relations avec le peuplement des biotopes aquatiques voisins

Abstract

Thermal stability (12.6 °C) and constant renewal of water in these natural wells under a mediterranean climate has allowed the development of a unique fauna. In comparison with neighbouring swampy communities, there is the presence of cold-water stenotherms that usually have a boreoalpine and rheobiontic distribution (crenon → rhithron → potamon). The most typical species are: Pseudamnicola lanceolata and P. anatina (molluscs), Atractides prosiliens (Hydracarina), Gymnometriocnemus brumalis, Orthocladius rubicundus, Pseudorthocladius curtistylus (chironomids), Athripsodes dissimilis (Trichoptera). © 1980 Masson.