I am interested in testing the program of Federico Spinazzi dealing
withBray-Curtis-Ordination. But I am more interested to know what
Bray-Curtis ordination is. May you can send me a copy of the cited
article of Beals 1984?
We ourself apply clustering methods and multidimensional scaling (MDS)
basing on the Bray-Curtis-Index. Curiously the Bray-Curtis-Index is used
only in marine ecology. One reason for that is the work and the software
PRIMER of Clarke and Warwick of Plymouth Marine Laboratory .
(http://www.clues.abdn.ac.uk:8080/directory/Ecology/Ecology35.html), what
is well known around the North Sea.
One characteristic property of the Bray-Curtis-Index is, that joint
absence has no effect on the resulting value. Further, for two zero
samples that index is not defined.
Greetings,
Michael Kinder
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Michael Kinder
Bundesanstalt f}r Gewaesserkunde, BfG
(Federal Institut of Hydrology)
Postfach 309
D-56003 Koblenz
Tel. +261/1306-5474
Fax. +261/1306-5374
kinder@koblenz.bfg.bund400.de
www.bafg.de
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