Détail de la notice
Titre du Document
Phylogenetic signatures of facilitation and competition in successional communities : Facilitation in Plant Communities
Auteur(s)
VERDU Miguel ; REY Pedro J. ; ALCANTARA Julio M. ; ...
Résumé
1. The balance between facilitation and competition through time is at the core of models for successional dynamics. However, since the 1980s, the studies of facilitation have shifted away from successional processes. In a return to the traditional roots of the study of facilitation, we assessed the phylogenetic signatures of competition and facilitation in Mediterranean successional communities and compared them with those recently quantified in non-successional communities of the Mexican desert. 2. Based on previous work, we hypothesized that facilitation between distantly related lineages is an important driver of successional dynamics, as has been shown in non-successional systems. However, we also predicted that the balance between facilitation and competition will be different in successional systems because many species disappear from communities during the process of succession, which does not occur in non-successional systems. 3. We sampled plant species composition over a chronosequence of post-fire succession and predicted phylogenetic clustering in communities at the early stages caused by species that reproduce by seed ('seeders', belonging to a few specific families) being favoured by fire; overdispersion in intermediate stages driven by facilitation interactions among distantly related species; and randomness in the final stage caused by the competitive exclusion of pioneer species belonging to a few families and the survival of species in many other families.
Editeur
Blackwell Science
Identifiant
ISSN : 0022-0477 CODEN : JECOAB
Source
Journal of Ecology A. 2009, vol. 97, n° 6, pp. 1171-1180 [10 pages] [bibl. : 1 p.]
Langue
Anglais
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