GLM versus CCA spatial modeling of plant species distribution

Details

Serval ID
serval:BIB_D4A13D45ABF0
Type
Article: article from journal or magazin.
Collection
Publications
Title
GLM versus CCA spatial modeling of plant species distribution
Journal
Plant Ecology
Author(s)
Guisan A., Weiss S. B., Weiss A. D.
ISSN
1385-0237
Publication state
Published
Issued date
1999
Peer-reviewed
Oui
Volume
143
Number
1
Pages
107-122
Language
english
Abstract
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.
Keywords
constrained ordination, disturbances, logistic regression, model comparison, plant distribution, spatial modeling, Spring Mountains (Nevada)
Web of science
Create date
24/01/2008 19:06
Last modification date
20/08/2019 15:54
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