GLM versus CCA spatial modeling of plant species distribution

Détails

ID Serval
serval:BIB_D4A13D45ABF0
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
GLM versus CCA spatial modeling of plant species distribution
Périodique
Plant Ecology
Auteur⸱e⸱s
Guisan A., Weiss S. B., Weiss A. D.
ISSN
1385-0237
Statut éditorial
Publié
Date de publication
1999
Peer-reviewed
Oui
Volume
143
Numéro
1
Pages
107-122
Langue
anglais
Résumé
Despite the variety of statistical methods available for static modeling of plant distribution, few studies directly compare methods on a common data set. In this paper, the predictive power of Generalized Linear Models (GLM) versus Canonical Correspondence Analysis (CCA) models of plant distribution in the Spring Mountains of Nevada, USA, are compared. Results show that GLM models give better predictions than CCA models because a species-specific subset of explanatory variables can be selected in GLM, while in CCA, all species are modeled using the same set of composite environmental variables (axes). Although both techniques can be readily ported to a Geographical Information System (GIS), CCA models are more readily implemented for many species at once. Predictions from both techniques rank the species models in the same order of quality; i.e. a species whose distribution is well modeled by GLM is also well modeled by CCA and vice-versa. In both cases, species for which model predictions have the poorest accuracy are either disturbance or fire related, or species for which too few observations were available to calibrate and evaluate the model. Each technique has its advantages and drawbacks. In general GLM will provide better species specific-models, but CCA will provide a broader overview of multiple species, diversity, and plant communities.
Mots-clé
constrained ordination, disturbances, logistic regression, model comparison, plant distribution, spatial modeling, Spring Mountains (Nevada)
Web of science
Création de la notice
24/01/2008 19:06
Dernière modification de la notice
20/08/2019 15:54
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