Abstract (eng)
The study at hand presents 51 exemplary nature conservation projects in stone pits, sand pits and gravel pits that are applying the approach of Restoration Ecology.
In order to provide a compilation, the projects and their diverse stakeholders and strategies were described and assessed.
Methodologically, the written interrogation via standardized, self-composed questionnaire was chosen, along with semi-structured oral expert interviews. A selective internet research with keywords amplified the results.
The attributes of restored ecosystems published by the Society for Ecological Restoration set the content-related pattern for the questionnaire. In compliance with this, a set of indicators was developed to assess the results.
Considering planning and implemetation, more than two thirds of the projects were assesed with „good“, nine even achieved with „very good“.
Furthermore, 36 target species and target biotopes were determined. To accentuate the high diversity of projects, they were aggregated to five different ecological restoration strategies. These strategies are characterized by intensity, frequency and kind of intervention. Most allocations were attained by the strategy with species and biotope protection goals. A comparison of exemplary nature conservation criteria, published by both industry and nature conservation participants, shows that citations of the first group depict the different meanings of the term biodiversity, whereas citations from a conservation context are action-orientated. The request for an equal cooperation could be derived from expert interviews. The study is topped off by a historical retrospect as well as reflections on the legal and financial background of nature conservation projects on quarries.