Detailed Information on Publication Record
2005
Can plant community ordinations be affected by various sample plot sizes in grasslands?
OTÝPKOVÁ, ZdenkaBasic information
Original name
Can plant community ordinations be affected by various sample plot sizes in grasslands?
Name in Czech
Mohou být ordinace lučních společenstev ovlivněny velikostí ploch?
Authors
OTÝPKOVÁ, Zdenka (203 Czech Republic, guarantor)
Edition
2005. vyd. Vienna, 17th International Botanical Congress, Vienna, Austria, 17.-23.7.2005, p. 564-1291, 2005
Publisher
IBC
Other information
Language
English
Type of outcome
Stať ve sborníku
Field of Study
10600 1.6 Biological sciences
Country of publisher
Austria
Confidentiality degree
není předmětem státního či obchodního tajemství
RIV identification code
RIV/00216224:14310/05:00013167
Organization unit
Faculty of Science
Keywords in English
plot size; phytosociology; PCA DCA; Procrustes analysis
Změněno: 2/1/2007 17:44, Mgr. Zdenka Preislerová, Ph.D.
V originále
Vegetation samples from plots that are stored in phytosociological databases often differ by one or two orders of magnitude in size, even within a single vegetation type. This fact may influence vegetation analysis, but the extent of this possible influence has not been investigated so far. The effect of sample plot size on ordination results was investigated in grassland vegetation in southern Moravia (Czech Republic), using data from nested plots of 1, 4, 16, 25 and 49 m2, placed along two ecological gradients: long gradient (including different vegetation types and various climatic condition in a larger area) and short gradient (small area with a floristically homogeneous vegetation type). In both gradients the smallest plot sizes showed the most deviating patterns in ordinations, while samples of larger sizes gave similar results. The transformation of percentage cover also affected the results, more so when samples were collected along short ecological gradient. Samples differing in size by one order (1 and 49 m2) seem to be inappropriate to combine together in ordination analysis, especially when they were sampled along a short ecological gradient.
In Czech
Analýzy vegetačních snímků jsou ovlivněny velikosti, na které tyto byly zapsány. Výsledky ukazují, že ordinace jsou různými velikostmi velmi ovlivněné.
Links
| GA206/05/0020, research and development project |
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| MSM0021622416, plan (intention) |
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