FAUNA AND FLORA
The lake's fauna is one of its great riches. The marsh of La Véronnière to the north, classified "protected natural area", is one of the most beautiful bird sanctuaries of the Dauphiné: grebes, herons, kingfishers, ducks, teals, coots, swans find shelter and food, for to quote only a few species.
The aquatic fauna is not less rich: pike, carp, perch, tench, lavarets, crayfish, Arctic char, trout, etc ... make Lake Paladru a popular place for fishermen.
There are also water mussels (anodonts) that are highly toxic! On the other hand, they filter the water and help purify it.
The aquatic flora includes many species of plants, some of which are essential to the life of the lake and the wildlife that inhabits it. For example: the reeds participate in the natural sanitation of the lake and shelter the nest of coots. Water lilies beautify the lake during flowering. Underwater herbs help small fish protect themselves from their predators. Plankton feeds carp and many other species ...
The lake is a living world, both rich and fragile.
Aquatic plants :
- reeds (phragmites)
- the rushes
- the water lily
- the pondweeds
- water mille
- swimming horn-rush
- the aquatic buttercup
- amphibious knotweed: plant that floats
- Amphibious watercress or wild horseradish
- the carrots: plants between mosses and algae
- the hammer
- the water lens
- the marsh iris
Many of these plants have become very rare, or even disappeared, victims of water pollution, pollution that is now halted by the sewage belt. But nitrates are still too much present.
o Arctic charr; at the time of spawning, he becomes the "golden fish". It feeds on microscopic crustaceans and live prey. The spawning grounds, the omblières, are located in a protected hole and a clear water source.
o Carp: when spawning, it jumps. She lays her eggs on the aquatic plants of the edge. It is an omnivorous fish. In winter, she goes on lethargy, does not move and does not eat.
o The tench: its eggs adhere to herbs like those of carp.
o The roach or veron. It lays its eggs on the seaweed covered bottoms or on submerged roots (La Veronnière locality). In winter, he is asleep in the depths.
o Roach gold ruddy gold redhead
o The miller gold horse or sculpin
o Pike. It is the freshwater shark.
o The perch. Its eggs form greenish-white roses on the shore stones or aquatic plants. It is voracious and feeds on fish and fry. She also eats dragonflies. At home, the perchettes are called "brunettes".
- Eels and crayfish: they have become very rare.
- The catfish
- The wild duck
- The coot
- The water hen
- The grebe
- The Seagull
- The butor
- The birds of passage: the heron, the lapwing, the plover, the wild goose, the scaup miloin and morillon, redshank, guillette, seagull, net redhead.
In recent years, the cormorant settles and devours a huge amount of fry but also pikes up to 50 cms, poles up to 740 g. Also trout, char, whitefish, etc ... Although protected bird, a prefectural decree authorizes to cut down a small number to limit their nuisance.
Other aquatic animals:
- The muskrat which does big damage in the reed beds.