SCHÖB, Christian; MICHALET, Richard; CAVIERES, Lohengrin; PUGNAIRE, Francisco; BROOKER, Rob; BUTTERFIELD, Bradley; COOK, Bradley; KIKVIDZE, Zaal; LORTIE, Christopher; XIAO, Sa; AL HAYEK, Patrick; ANTHELME, Fabien; CRANSTON, Brittany; GARCÍA, Sa; LE BAGOUSSE-PINGUET, Yoann; REID, Anya; LE ROUX, Peter; LINGUA, Emanuele; NYAKATYA, Mawethu; TOUZARD, Blaise; ZHAO, Liang; CALLAWAY, Ragan

doi:10.1111/nph.12641

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SCHÖB, Christian
Department of Evolutionary Biology and Environmental Studies [IEU]

MICHALET, Richard
Biodiversité, Gènes & Communautés [BioGeCo]

CAVIERES, Lohengrin
Universidad de Concepción = University of Concepción [Chile] [UdeC]

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Article de revue

Ce document a été publié dans

New Phytologist. 2014, vol. 202, n° 1, p. 95-105

Wiley

Résumé en anglais

Facilitative interactions are defined as positive effects of one species on another, but bidirectional feedbacks may be positive, neutral, or negative. Understanding the bidirectional nature of these interactions is a fundamental prerequisite for the assessment of the potential evolutionary consequences of facilitation. * In a global study combining observational and experimental approaches, we quantified the impact of the cover and richness of species associated with alpine cushion plants on reproductive traits of the benefactor cushions. We found a decline in cushion seed production with increasing cover of cushion-associated species, indicating that being a benefactor came at an overall cost. The effect of cushion-associated species was negative for flower density and seed set of cushions, but not for fruit set and seed quality. Richness of cushion-associated species had positive effects on seed density and modulated the effects of their abundance on flower density and fruit set, indicating that the costs and benefits of harboring associated species depend on the composition of the plant assemblage. Our study demonstrates ‘parasitic’ interactions among plants over a wide range of species and environments in alpine systems, and we consider their implications for the possible selective effects of interactions between benefactor and beneficiary species.< Réduire

Mots clés en anglais

Reproductive success

Reciprocal interactions

Plant–plant interactions

Parasitism

Competition

Cost and benefit of facilitation

Nurse plant system

Community feedbacks

DOI

http://dx.doi.org/10.1111/nph.12641

Project ANR

Organismes et Organisations Localement Adaptés

Origine

Importé de hal

Unités de recherche

BioGeCo (Biodiversité Gènes & Communautés) - UMR 1202