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Titolo:
A GENERALIZED STANDARDIZATION PROCEDURE IN ECOLOGICAL ORDINATION - TSTS WITH PRINCIPAL COMPONENTS-ANALYSIS
Autore:
KARADZIC B; POPOVIC R;
Indirizzi:
INST BIOL RES,SINISA STANKOVIC 29,NOVEMBRA 142 YU-11060 BELGRADE YUGOSLAVIA
Titolo Testata:
Journal of vegetation science
fascicolo: 2, volume: 5, anno: 1994,
pagine: 259 - 262
SICI:
1100-9233(1994)5:2<259:AGSPIE>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Keywords:
ARCH EFFECT; COENOCLINE; CORRESPONDENCE ANALYSIS; DISTORTION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
NO
Recensione:
Indirizzi per estratti:
Citazione:
B. Karadzic e R. Popovic, "A GENERALIZED STANDARDIZATION PROCEDURE IN ECOLOGICAL ORDINATION - TSTS WITH PRINCIPAL COMPONENTS-ANALYSIS", Journal of vegetation science, 5(2), 1994, pp. 259-262

Abstract

Standardization by norms of sample position vectors as well as by sample totals has been used frequently in vegetation ecology. Both standardizations are only special cases of the Generalized Standardization Procedure (GSP) described in this paper. The general procedure allows awide choice of data transformations simply by varying values of a single standardization parameter. Principal Components Analysis (PCA) often involutes opposite ends of a coenospace, producing results that maybe difficult to interpret. Experiments with simulated as well as field data sets revealed that involuted gradients can be unfolded if GSP is applied prior to PCA. Compared to Correspondence Analysis, GSP-PCA was superior in recovering the structure of analysed coenoclines.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/09/20 alle ore 12:16:14