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@article{621568,
author = {Knollová, Ilona and Chytrý, Milan and Tichý, Lubomír and Hájek, Ondřej},
article_location = {Bratislava},
article_number = {1},
keywords = {dry grasslands; ecological scale; vegetation survey},
language = {eng},
issn = {0006-3088},
journal = {Biologia},
title = {Local ranges of phytosociological associations: are they reflected in numerical classification?},
url = {http://www.sci.muni.cz/botany/chytry/Knollova_etal2006_Biologia.pdf},
volume = {61},
year = {2006}
}
TY - JOUR
ID - 621568
AU - Knollová, Ilona - Chytrý, Milan - Tichý, Lubomír - Hájek, Ondřej
PY - 2006
TI - Local ranges of phytosociological associations: are they reflected in numerical classification?
JF - Biologia
VL - 61
IS - 1
SP - 71-77
EP - 71-77
PB - Slovak Academy of Sciences
SN - 00063088
KW - dry grasslands
KW - ecological scale
KW - vegetation survey
UR - http://www.sci.muni.cz/botany/chytry/Knollova_etal2006_Biologia.pdf
N2 - In the tradition of European phytosociology, delimitations of vegetation units such as associations are mostly based on data from small areas where more detailed vegetation sampling has been carried out. Such locally delimited vegetation units are often accepted in large-scale synthetic classifications, e.g. national vegetation monographs, and tentatively assigned to a small geographical range, forming groups of similar (vicarious) vegetation units in different small areas. These vicarious units, however, often overlap in species composition and are difficult to recognize from each other. We demonstrate this issue using an example of the classification of dry grasslands (Festuco-Brometea) in the Czech Republic. The standard vegetation classification of the Czech Republic supposes that the majority of accepted associations (66 out of 68) have a restricted distribution in one of the two major regions, Bohemia or Moravia. We compared the classification into traditional associations with the numerical classification of 1440 phytosociological relevés from the Czech Republic, in order to test whether the traditionally recognized associations with small geographical ranges are reflected in numerical classification. In various comparisons, the groups of relevés identified by numerical analysis occupied larger areas than the traditional associations. This suggests that with consistent use of total species composition as the vegetation classification criterion, the resulting classification will usually include more vegetation units with larger geographical ranges, while many of the traditional local associations will disappear.
ER -
KNOLLOVÁ, Ilona, Milan CHYTRÝ, Lubomír TICHÝ and Ondřej HÁJEK. Local ranges of phytosociological associations: are they reflected in numerical classification? \textit{Biologia}. Bratislava: Slovak Academy of Sciences, 2006, vol.~61, No~1, p.~71-77. ISSN~0006-3088.
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