Abstract
The differentiation of river flood plain vegetation is predominantly determined by the inundation frequency and the type and age of the substrate. A comparison of data published in 1958 with recent relevés from all parts of Switzerland indicate that the hitherto known gradient- and group structure is disintegrating into multiple floristically isolated stands as a result of waterflow management constructions. In view of further vegetation mapping, a two-phase classification is proposed where the core of the gradients and groups is isolated and analysed first. The outliers are then re-attached to serve as possible indicators of the existence of variation not sufficiently described by the data. To structure the tedious analytical calculations involved, a hierarchical procedure has been developed.
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Abbreviations
- AOC =:
-
Analysis of concentration
- CA =:
-
Correspondence analysis
- PCA =:
-
Principal components analysis
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Wildi, O. Analysis of the disintegrating group and gradient structure in Swiss riparian forests. Vegetatio 83, 179–186 (1989). https://doi.org/10.1007/BF00031690
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DOI: https://doi.org/10.1007/BF00031690