Some of the pools in the wet heath of the Diersfordt Wood were destroyed by drainage and peat cutting from the 16th century onwards. What remained were muddy drainage ditches and dells. Two of these were used to create new oligotrophic ponds typical of the biotope.
As with the de-sludging of the Schwarzes Wasser, an excavator was used and the work was overseen by RVR Ruhr Grün and the Biological Station. The excavated material was reused in a nearby composting facility. The trees in the immediate vicinity were also felled in order to minimise shading and nutrient input by falling leaves.
There is a high degree of anticipation about the development of these small pools. Moor frog and sympetrum dragonflies are expected to arrive within a few years. Sundew, wool grass and marsh clubmoss are also among this measure’s target species.