Phenotypic variation in nurse traits and community feedbacks define an alpine community
MICHALET, Richard
Biodiversité, Gènes & Communautés [BioGeCo]
Department of Biological Sciences and Merriam Powell Center for Environmental Research
See more >
Biodiversité, Gènes & Communautés [BioGeCo]
Department of Biological Sciences and Merriam Powell Center for Environmental Research
MICHALET, Richard
Biodiversité, Gènes & Communautés [BioGeCo]
Department of Biological Sciences and Merriam Powell Center for Environmental Research
Biodiversité, Gènes & Communautés [BioGeCo]
Department of Biological Sciences and Merriam Powell Center for Environmental Research
SMITH, David S.
Department of Biological Sciences and Merriam Powell Center for Environmental Research
Department of Biological Sciences and Merriam Powell Center for Environmental Research
WHITHAM, Thomas G.
Department of Biological Sciences and Merriam Powell Center for Environmental Research
< Reduce
Department of Biological Sciences and Merriam Powell Center for Environmental Research
Language
en
Article de revue
This item was published in
Ecology Letters. 2011, vol. 14, n° 5, p. 433-443
Wiley
English Abstract
Much is known about facilitation, but virtually nothing about the underlying genetic and evolutionary consequences of this important interaction. We assessed the potential of phenotypic differences in facilitative effects ...Read more >
Much is known about facilitation, but virtually nothing about the underlying genetic and evolutionary consequences of this important interaction. We assessed the potential of phenotypic differences in facilitative effects of a foundation species to determine the composition of an Alpine community in Arizona. Two phenotypes of Geum rossii occur along a gradient of disturbance, with ‘tight’ competitive cushions in stable conditions and ‘loose’ facilitative cushions in disturbed conditions. A common-garden study suggested that field-based traits may have a genetic basis. Field experiments showed that the reproductive fitness of G. rossii cushions decreased with increasing facilitation. Finally, using a dual-lattice model we showed that including the cost and benefit of facilitation may contribute to the co-occurrence of genotypes with contrasting facilitative effects. Our results indicate that changes in community composition due to phenotypic differences in facilitative effects of a foundation species may in turn affect selective pressures on the foundation species.Read less <
Keywords
FACILITATION
GENETIQUE DES COMMUNAUTÉS
English Keywords
COMMON-GARDEN EXPERIMENT
COMMUNITY FEEDBACKS
COMMUNITY GENETICS
COST OF FACILITATION
DUAL-LATTICE MODEL
FOUNDATION SPECIES
PHYSICAL DISTURBANCE
GEUM ROSSII
Origin
Hal imported