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Titre du document / Document title

Phylogenetic signatures of facilitation and competition in successional communities

Titre de regroupement

Facilitation in Plant Communities

Auteur(s) / Author(s)

VERDU Miguel (1) ; REY Pedro J. (2) ; ALCANTARA Julio M. (2) ; SILES Gemma (2) ; VALIENTE-BANUET Alfonso (3 4) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Centro de Investigaciones sobre Desertificacion (CIDE, CSIC-UV-GV), Apartado Oficial, 46470 Albal, Valencia, ESPAGNE
(2) Departamento de Biologia Animal, Biologia Vegetal y Ecologia, Universidad de Jaén, 23071 Jaen, ESPAGNE
(3) Depattamento de Ecologia de la Biodiversidad, Instituto de Ecologia, Universidad Nacional Autónoma de México, AP 70-275, CP 04510 Mexico, DF, MEXIQUE
(4) Centro de Ciencias de la Complejidad, Ciudad Universitaria, Universidad Nacional Autónoma de México, 04510 Mexico, DF, MEXIQUE

Résumé / Abstract

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. 4. In the pioneer stage, we found a random phylogenetic pattern because seeders and many resprouter species were present at this stage, indicating that autosuccession was also occurring. In intermediate phases, once pioneers had recruited into open spaces and facilitated late-successional species, most of which were ancient taxa originating during the Tertiary, phylogenetic overdispersion predominated. Finally, in the later stages competitive exclusion of pioneer species reduced phylogenetic diversity, leading to a random phylogenetic structure. 5. Synthesis. As previously found for non-successional communities, facilitation among distantly related lineages appeared to drive successional dynamics. However, subsequent competition reduced phylogenetic diversity during succession in this Mediterranean system, and some species disappeared from the community.

Revue / Journal Title

Journal of ecology    ISSN  0022-0477   CODEN JECOAB 

Source / Source

2009, vol. 97, no6, pp. 1171-1180 [10 page(s) (article)] (1 p.)

Langue / Language

Anglais

Editeur / Publisher

Blackwell, Oxford, ROYAUME-UNI  (1913) (Revue)

Mots-clés anglais / English Keywords

Dynamics

;

Community

;

Competition

;

Facilitation

;

Phylogeny

;

Mots-clés français / French Keywords

Dynamique

;

Communauté

;

Compétition

;

Facilitation

;

Phylogenèse

;

Mots-clés espagnols / Spanish Keywords

Dinámica

;

Comunidad

;

Competencia

;

Facilitación

;

Filogénesis

;

Mots-clés d'auteur / Author Keywords

community phylogenetics

;

competition

;

cyclical dynamics

;

facilitation

;

Mediterranean communities

;

phylogenetic overdispersion

;

succession

;

Localisation / Location

INIST-CNRS, Cote INIST : 2004, 35400017009110.0060

Nº notice refdoc (ud4) : 22037179



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