Illegal logging, landscape structure and the variation of tree species richness across North Andean forest remnants

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Ressource 1Télécharger: BIB_070E8C149D75.P001.pdf (512.45 [Ko])
Etat: Public
Version: Final published version
ID Serval
serval:BIB_070E8C149D75
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Illegal logging, landscape structure and the variation of tree species richness across North Andean forest remnants
Périodique
Forest Ecology and Management
Auteur⸱e⸱s
Aubad, J., , Aragón, P., , Olalla-Tárraga  M.A., Rodríguez  M. A.
Statut éditorial
Publié
Date de publication
2008
Volume
255
Pages
1892-1899
Résumé
We explored the influence of a common practice in tropical countries, namely illegal logging for household consumption (ILHC), as well as that of characteristics of habitat structure on the variation of tree species richness across 10 cloud forest remnants of a Colombian Andean landscape. We estimated species richness for total, early and late successional tree species for each forest fragment. We also generated a binomial ILHC variable and six quantitative habitat descriptors related to patch size, shape and isolation. The data were analyzed with generalized linear models (GLMs) and model selection techniques based on Information Theory, complemented with partial regression analyses.We found that the presence of ILHC decreased the number of species for all tree groups, being this variable the major driver of richness variation across forest remnants. Our analyses also indicated that landscape characteristics played secondary roles in determining tree richness in all cases. Additionally, stronger negative impacts of ILHC on late successional tree species suggest that these logging activities are likely to move back ecological succession towards earlier stages of this process. As far as we know, this is the first study documenting the relative importance of ILHC practices against landscape structure for tree species richness. Our results strongly emphasize the need to consider ILHC in investigations and conservation initiatives involving tree species richness in fragmented tropical landscapes.
Mots-clé
Fragmentation, Landscape ecology, Anthropogenic disturbance, Plant richness, Cloud forest
Création de la notice
14/01/2011 14:34
Dernière modification de la notice
20/08/2019 12:29
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