What did the expansion do to the watercourse? Info panel 8
When a natural watercourse was developed and standardised, as in the case of the Holztrift, this meant a radical cut and loss of habitat for the watercourse organisms. The many small habitats were erased and replaced by walls or wooden structures. Only a few organisms survived here, especially since the rushing wave took not only wood with it.
However, if almost 200 years have passed since the construction and over 100 years since the last drifting, typical aquatic organisms reappear. They accept the sandstones as rocks, and the wooden shoring has rotted away. If the water is clean and the stream is undisturbed for a long time, this is also reflected in the water ecology.