Nearby fishing ?

The theory that these houses were adapted to wetland areas because of the biological diversity of the surroundings does not hold up for long.

Of course, fishing activities were well developed on large lakes that even today are full of fish. But this is not the case with peat bogs or with small lakes like Chalain and Clairvaux, where conditions are not at all favorable for the proliferation of fresh-water species.

In addition, it is obvious that frequent fishing activities do not at all mean that houses have to be built standing in the water.