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.
Nomenclature
Hess, H. E., Landolt, E. & Hirzel, R. 1976–1980. Flora der Schweiz und angrenzender Gebiete. Band 1–3. 2. Aufl., Birkhäuser, Basel.
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Abbreviations
- AOC:
-
Analysis of concentration
- CA:
-
Correspondence analysis
- PCA:
-
Principal components analysis
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Wildi, O. (1990). Analysis of the disintegrating group and gradient structure in Swiss riparian forests. In: Grabherr, G., Mucina, L., Dale, M.B., Ter Braak, C.J.F. (eds) Progress in theoretical vegetation science. Advances in vegetation science, vol 11. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-1934-1_15
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DOI: https://doi.org/10.1007/978-94-009-1934-1_15
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