In order to make clear, in accordance with the general model, the transformation from railyard to urban wilderness over time, the natural dynamics of some areas are arrested. In this way, three types of spaces or “rooms” were defined: “clearings” are to be kept free of shrubs over the long term. Stands that are light and open are to be maintained as “groves,” while in the “wild woods” the natural dynamics can proceed fully unfettered.
The spatial determination of the three types was carried out according to nature conservation and landscape aesthetic criteria. In addition to the presence of rare species and communities, lines of sight within and outside of the site were considered as well as relics of the old rail industry and particularly attractive vegetation and individual trees. Before the opening of the nature park, plants were removed from overgrown areas that were once clearings or groves in order to create the predefined room structure. The open character of these rooms is ensured through long-term maintenance (mowing, removal of trees) by the Berlin nature conservation authority. The spread of the “wild woods” into the other spaces is prevented through maintenance measures. In the interior of the woodlands, natural processes proceed undisturbed (Fig. 4).