The great lakes of Seine were set up from the 1960s to protect Paris from floods.[2][3] Their completion in the 1990s allowed the establishment of peripheral natural environments linked to their presence. The protection of these environments was ensured by the creation of the nature reserve in 2002.[4]
Ecology (biodiversity, ecological interest, etc.)
The site interest is due to its location on the migratory routes of several species of waterbirds. There are mainly 3 main types of environments:
lake environments with a fluctuating water level which generates areas of mudflats;
grassland environments staggered according to their humidity (meadows, reed beds);
forest environments made up of oak woods and charms.
The variations in the water level of the lakes and areas of mudflats that result from it generate very rich environments sheltering an aquatic flora. There are remarkable species such as the Ranunculus lingua or the Pulicaria vulgaris[5].
Wildlife
There are around 40 species of mammals frequenting the site. There are also 24 heritage species, including 16 species of bats. Some of the protected species are the wildcat, polecat (Mustela putorius putorius), barbastella as well as the Eurasian otter.
The site is known for its remarkable bird life linked to aquatic or forest environments. It has more than 200 species, 92 of which are nesting. Among migratory species, we find the black stork, greater white-fronted and greylag geese, Bewick's swan (Cygnus columbianus bewickii), Eurasian teal, common goldeneye, smew, etc.
The site is very rich in beetles (800 inventoried species) and dragonflies.
Touristic and educational interest
The interior of the nature reserve is closed to the public. Sites on the outskirts, such as the Valois observatory, allow visitors to observe the flora and fauna without disturbing them. Trips to the periphery of the reserve as well as articles published in various journals also allow the public to learn about the actions carried out on the reserve. At Maison du Parc, video cameras installed on the site allow visitors to experience the highlights of the reserve[6]
The nature reserve was created by a decree of July 9, 2002.[7] Its territory also forms part of the following zonings: Zone Ramsar No. 5 « Etangs de la Champagne humide », ZICO n°CA02, ZNIEFF de type I No. 00639 et de type II No. 00640, ZPS« Lacs de la Forêt d'Orient », ZSC« Forêt d'Orient ».