Canonical non-symmetrical correspondence analysis: an alternative in constrained ordination

Priscila M. Willems; Purificación Galindo-Villardón

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Canonical non-symmetrical correspondence analysis: an alternative in constrained ordination

Autores: Priscila M. Willems, Purificación Galindo-Villardón
Localización: Sort: Statistics and Operations Research Transactions, ISSN 1696-2281, Vol. 32, Nº. 1, 2008, págs. 93-111
Idioma: inglés
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Resumen
- Canonical non-symmetrical correspondence analysis is developed as an alternative method for constrained ordination, relating external information (e.g., environmental variables) with ecological data, considering species abundance as dependant on sites. Ordination axes are restricted to be linear combinations of the environmental variables, based on the information of the most abundant species.
  
  This extension and its associated unconstrained ordination method are terms of a global model that permits an empirical evaluation of the impact that the environmental variables have on the community composition. Scores, contributions, qualities of representation, interpretation of dispersion graphs and an application to real vegetation data are presented.
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