Ecological-niche factor analysis: how to compute habitat-suitability maps without absence data?

Détails

Ressource 1Télécharger: BIB_F1EC458DDC92.P001.pdf (1044.86 [Ko])
Etat: Serval
Version: de l'auteur
ID Serval
serval:BIB_F1EC458DDC92
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Ecological-niche factor analysis: how to compute habitat-suitability maps without absence data?
Périodique
Ecology
Auteur(s)
Hirzel A.H., Hausser J., Chessel D., Perrin N.
ISSN
0012-9658
Statut éditorial
Publié
Date de publication
2002
Peer-reviewed
Oui
Volume
83
Numéro
7
Pages
2027-2036
Langue
anglais
Notes
IZEAIDB7B167DD0D30
Résumé
We propose a multivariate approach to the study of geographic species distribution which does not require absence data. Building on Hutchinson's concept of the ecological niche, this factor analysis compares, in the multidimensional space of ecological variables, the distribution of the localities where the focal species was observed to a reference set describing the whole study area. The first factor extracted maximizes the marginality of the focal species, defined as the ecological distance between the species optimum and the mean habitat within the reference area. The other factors maximize the specialization of this focal species, defined as the ratio of the ecological variance in mean habitat to that observed for the focal species. Eigenvectors and eigenvalues are readily interpreted and can be used to build habitat-suitability maps. This approach is recommended in Situations where absence data are not available (many data banks), unreliable (most cryptic or rare species), or meaningless (invaders). We provide an illustration and validation of the method for the alpine ibex, a species reintroduced in Switzerland which presumably has not yet recolonized its entire range.
Mots-clé
Capra ibex, ecological niche, GIS, habitat suitability, marginality, multivariate analysis, presence-absence elata, specialization, species distribution, Switzerland
Web of science
Open Access
Oui
Création de la notice
24/01/2008 20:02
Dernière modification de la notice
09/05/2019 3:20
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