An Indicator-Based Characterization of the Bornhöved Key Ecosystems
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In the preceding chapters two significant impacts on the landscape dynamics of the Bornhöved Lake District during the past 30 years have been analysed, namely eutrophication and wetland drainage. Their intensity can be classified by means of the hemeroby approach (Blume and Sukopp 1976) which has been widely applied in Central Europe (Kowarik 1999). Accordingly four levels of increasing human impact can be distinguished, namely oligo-, meso-, eu- and polyhemerobic systems which are associated with different degrees of productivity, structural and functional differentiation. Focusing on the landscape level, the pertinent questions then are:
Which are the interrelated consequences of such impacts for ecosystem and landscape structures and functions?
How do these impacts influence the nutrient balance of the landscape, and how can the respective changes be assessed by selected functional indicators?
Which measures can be recommended for sustainable environmental management?
To discuss these issues, the multidimensionally defined ecosystems of the study area are analysed along a gradient of land use intensity (or hemerobic stages), which reflects successional sequences. In the next step, different ecosystem types are combined with the results of a water and substance simulation model operating on the landscape level. The modelling results are then connected with selected indicative output parameters in order to characterize different ecosystem states. On this basis, the ecological integrity of ecosystems can be evaluated, using a multi-parameter amoeba visualization. Finally, nutrient balances for the whole study area are presented and discussed within the scope of sustainable landscape management.
KeywordsMineral Soil Beech Forest Ecosystem Type Successional Series Microbial Soil Respiration
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