|Lake name:||Aulnes||Country:||France||GIG Region:||Med|
|GIG Type:||L-M1||Lake code:||FRDL115||Altitude(m a.s.l.):||11|
|Area (km²):||0.9||Mean depth (m):||4||Mixing regime:||Polymictic|
|Alkalinity (m eq/l):||2.66||Retention time (yr):||1||Chlorophyll a (µg/l):||9|
|Total phosphorus (µg/l):||51||Eutrophication status:||3 - High||Hydromorphological status:||----|
This pond is close to St Martin de Crau and to the Rhone delta called Camargue. Les Aulnes is one of the rare natural lakes present in the French Mediterranean region. Surrounded by a reed belt exposed to the mistral, this lake includes many fragile habitats for migratory and sedentary birds. Les Aulnes is also a cultural place with old Provencal style constructions, a residence for artists and a place for concerts. About half of its small catchment area is used for agriculture but no more artificial land use was observed. The environmental characteristics of this pond are not well known. Macrophyte communities are dominated by Ceratophyllum demersum, Najas marina and Potamogeton pectinatus. According to a previous study carried out by the Cemagref, we just know that the fish community includes 13 species and is dominated by Silurus glanis and Cyprinids.
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