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    Numerical classification and ordination of ruderal plant communities (Sisymbrietalia, Onopordetalia) in the western part of Slovakia

    Access Status
    Fulltext not available
    Authors
    Mucina, Ladislav
    Date
    1982
    Type
    Journal Article
    
    Metadata
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    Citation
    Mucina, L. 1982. Numerical classification and ordination of ruderal plant communities (Sisymbrietalia, Onopordetalia) in the western Slovakia. Vegetatio 48(3): pp 267-275.
    Additional URLs
    http://www.jstor.org/stable/20037102
    Faculty
    School of Agriculture and Environment
    Faculty of Science and Engineering
    Department of Environmental Biology
    Remarks

    This item may be available from Professor Ladislav Mucina

    Email: L.Mucina@curtin.edu.au

    URI
    http://hdl.handle.net/20.500.11937/32431
    Collection
    • Curtin Research Publications
    Abstract

    The ruderal communities of the orders Sisyrnbrietalia and Onopordetalia from the western part of Slovakia have been subjected to numerical classification and ordination. The ordination techniques proved to be a useful tool in the elucidation of the cluster pattern as well as in the detection of the main environmental variation underlying the floristic variation within the data. Results obtained with numerical techniques and traditional syntaxonomical classification have been compared. The similarity between these results is low at the level of the orders. This incompatability is explained by the differences in the weighting of the species in the course of the classification process and by the addition of non-floristical criteria that often occurs insyntaxonomical classification according to Braun-Blanquet. The highest value has been observed at the 3-clusters level (both orders and the Malvion neglectae). High similarity among the results of the numerical techniques have been observed, particularly in the group of space-dilating clusterings (Ward's method, Complete linkage clustering and McQuitty's similarity analysis). Average linkage clustering produces the most diverse result. The Malvion neglectae appeared as a separate group in all numerical techniques adopted. This suggests the upranking of its syntaxonomical position. The Bromo-Hordeion murini turned out to be a very heterotoneous syntaxon.

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