Ordination and classification of operational geographic units in Southwest Sweden

Autor: Per-Arne Andersson
Rok vydání: 1988
Předmět:
Zdroj: Vegetatio. 74:95-106
ISSN: 1573-5052
0042-3106
DOI: 10.1007/bf00044734
Popis: The vascular plant distributions of Dalsland and northern Bohuslan (Southwest Sweden) were subjected to multivariate analyses in order to delimit geographically coherent floristic zones. 271 squares of 5×5 km were the Operational Geographic Units; the data matrix comprises presence/absence species records for each OGU. Different ordination and classification methods were tested and detailed results are presented for detrended correspondence analysis (DCA), UPGMA and ordination space partitioning (OSP). A weighting procedure, neighbour-weighting, which gives pseudo-frequency scores along the nominal scale 0–9 depending on the species' distribution patterns, is introduced. The superior method for delimiting geographically coherent floristic zones was judged to be ordination space partitioning, using DCA and neighbour-weighted species scores.
Databáze: OpenAIRE
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