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Título: The context-dependence of beneficiary feedback effects in plant facilitations
Autores: Schöb, Christian
Callaway, Ragan M.
Anthelme, Fabien
Brooker, Rob W.
Cavieres, Lohengrin A.
Kikvidze, Zaal
Lortie, Christopher J.
Michalet, Richard
Pugnaire, Francisco I.
Xiao, Sa
Cranston, Brittany H.
García, Mary-Carolina
Hupp, Nicole R.
Llambí, Luis Daniel
Lingua, Emanuele
Reid, Anya M.
Zhao, Liang
Butterfield, Bradley J.
Correo Electrónico: llambi@ula.ve
Editor: New Phytologist: DOI: 10.1111/nph.12908
Citación: Schöb C, Callaway R, Anthelme F, Brooker RW, Cavieres LA, Kikvidze Z, Lortie CJ, Michalet R, Pugnaire FI, Xiao S, Cranston B, García MC, Hupp N, Llambí LD, Lingua E, Reid A, Zhao L & Butterfield BJ. The context-dependence of beneficiary feedback effects in plant facilitations. New Phytologist 204(2):386-96 2014.
Resumen: Facilitative effects of some species on others are a major driver of biodiversity. These positive effects of a benefactor on its beneficiary can result in negative feedback effects of the beneficiary on the benefactor and reduced fitness of the benefactor. However, in contrast to the wealth of studies on facilitative effects in different environments, we know little about whether the feedback effects show predictable patterns of context dependence. We reanalyzed a global data set on alpine cushion plants, previously used to assess their positive effects on biodiversity and the nature of the beneficiary feedback effects, to specifically assess the context dependence of how small- and large-scale drivers alter the feedback effects of cushion-associated (beneficiary) species on their cushion benefactors using structural equation modelling. The effect of beneficiaries on cushions became negative when beneficiary diversity increased and facilitation was more intense. Local-scale biotic and climatic conditions mediated these community-scale processes, having indirect effects on the feedback effect. High-productivity sites demonstrated weaker negative feedback effects of beneficiaries on the benefactor. Our results indicate a limited impact of the beneficiary feedback effects on benefactor cushions, but strong context dependence. This context dependence may help to explain the ecological and evolutionary persistence of this widespread facilitative system.
Colación: 1-11
Fecha: 20-May-2014
Palabras Claves: Antagonistic plant–plant interactions
Beneficiary feedback effect
Competition
Context dependence
Facilitation
Nurse plant
Parasitism
Sstructural
Institución: Universidad de Los Andes
URI: http://www.saber.ula.ve/handle/123456789/43031
Aparece en colecciones:Articulos, Pre-prints (Instituto de Ciencias Ambientales y Ecológicas (ICAE))

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