They allowed the man to put a foot to the ocean, taming these natural environments. These coveted environments are the result of an almost imperceptible rise in marine soils by sedimentation facilitated by pioneer vegetation in the lower fringe of the shore. It was there that sheep were grazed, shellfish gathered, harvests gathered, nets laid. It is also where the first dikes were erected, leaving the shoreline to form in a few decades a new vegetal seafront. And the story started again. These particularly rich environments also have incalculable virtues: not only do they serve as living or feeding grounds for species that we also exploit (coastal fishing), but they have the physical properties of coastal protection that are irreplaceable.
The Municipality of Teste de Buch has added a modern hydraulic structure, which regulates the water: salt water flows towards the basin, while fresh water flows back into the salt meadows, recreating the phenomenon of tides while preserving the ecosystem.