Die Anwendung einer ?deduktiven Methode syntaxonomischer Klassifikation? bei der Bearbeitung der strassenbegleitenden Pflanzengesellschaften Nordostb�hmens

Kopecký, Karel; Hejný, Slavomil

doi:10.1007/bf01324770

Cited by 55 publications

(13 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We decided to classify each relevé cluster as a phytocoenon following the suggestion of Kopecký & Hejný (1978). The different phytocoena were designated by the names of the dominant species.…”

Section: Vegetation Analysismentioning

confidence: 99%

Phytosociological and ecological study of springs in Trentino (south-eastern Alps, Italy)

Tomaselli

Spitale²,

Petraglia³

2011

J Limnol

View full text Add to dashboard Cite

Section: Vegetation Analysismentioning

confidence: 99%

Phytosociological and ecological study of springs in Trentino (south-eastern Alps, Italy)

Tomaselli

Spitale²,

Petraglia³

2011

J Limnol

View full text Add to dashboard Cite

“…In traditional phytosociology, the stands without specialist species are usually referred to as impoverished, atypical, initial, degraded, transitional, trunk or basal communities. Kopecký & Hejný (1978) proposed to assign these stands directly to higher syntaxa, such as alliances, orders or classes. Although their approach has been followed only in studies of synanthropic vegetation (Kopecký et al 1995), it is applicable to any vegetation type.…”

Section: Formally Definedmentioning

confidence: 99%

Formalized reproduction of an expert‐based phytosociological classification: A case study of subalpine tall‐forb vegetation

Kočí

Chytrý

Tichý

2003

J Vegetation Science

View full text Add to dashboard Cite

Abstract. Delimitation of vegetation units in phytosociology is traditionally based on expert knowledge. Applications of expert‐based classifications are often inconsistent because criteria for assigning relevés to vegetation units are seldom given explicitly. Still, there is, e.g. in nature conservation, an increasing need for a consistent application of vegetation classification using computer expert systems for unit identification. We propose a procedure for formalized reproduction of an expert‐based vegetation classification, which is applicable to large phytosociological data sets. This procedure combines Bruelheide's Cocktail method with a similarity‐based assignment of relevés to constancy columns of a vegetation table. As a test of this method we attempt to reproduce the expert‐based phytosociological classification of subalpine tall‐forb vegetation of the Czech Republic which has been made by combination of expert judgement and stepwise numerical classification of 718 relevés by TWINSPAN. Applying the Cocktail method to a geographically stratified data set of 21794 relevés of all Czech vegetation types, we defined groups of species with the statistical tendency of joint occurrences in vegetation. Combinations of 12 of these species groups by logical operators AND, OR and AND NOT yielded formal definitions of 14 of 16 associations which had been accepted in the expert‐based classification. Application of these formal definitions to the original data set of 718 relevés resulted in an assignment of 376 relevés to the associations. This assignment agreed well with the original expert‐based classification. Relevés that remained un‐assigned because they had not met the requirements of any of the formal definitions, were subsequently assigned to the associations by calculating similarity to relevé groups that had already been assigned to the associations. A new index, based on frequency and fidelity, was proposed for calculating similarity. The agreement with the expert‐based classification achieved by the formal definitions was still improved after applying the similarity‐based assignment. Results indicate that the expert‐based classification can be successfully formalized and converted into a computer expert system.

show abstract

“…Kopeck9 and Hejny therefore introduced the so-called deductive method (e.g. Kopeck9 & Hejny 1974, 1978Kopeck9 1992), which was adapted to the Dutch situation by SchaminCe et al (1991). Stortelder (1992) proposed the concept of vegetation strategies, inspired by the plant strategies concept of Grime (1979).…”

Section: Continuedmentioning

confidence: 99%

Recent developments in phytosociology*

Schaminée¹,

Stortelder²

1996

Acta Botanica Neerlandica

View full text Add to dashboard Cite

Die Anwendung einer ?deduktiven Methode syntaxonomischer Klassifikation? bei der Bearbeitung der strassenbegleitenden Pflanzengesellschaften Nordostb�hmens

Cited by 55 publications

References 4 publications

Phytosociological and ecological study of springs in Trentino (south-eastern Alps, Italy)

Phytosociological and ecological study of springs in Trentino (south-eastern Alps, Italy)

Formalized reproduction of an expert‐based phytosociological classification: A case study of subalpine tall‐forb vegetation

Recent developments in phytosociology*

Contact Info

Product

Resources

About