Trait hierarchies and intraspecific variability drive competitive interactions in Mediterranean annual plants

Both intra- and interspecific differences in traits may modulate interactions between plants. Two mechanisms are hypothesized to regulate these effects: competitive hierarchies and trait dissimilarities, but it is unclear how the prevalence of each might depend on environmental conditions and on int...

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Detalles Bibliográficos
Autores: Pérez Carmona, Carlos, De Bello, Francesco, Martín Azcarate, Francisco, Peco Vázquez, Begoña, Mason, Norman W. H.
Tipo de recurso: artículo
Fecha de publicación:2019
País:España
Institución:Universidad Autónoma de Madrid
Repositorio:Biblos-e Archivo. Repositorio Institucional de la UAM
Idioma:inglés
OAI Identifier:oai:repositorio.uam.es:10486/714216
Acceso en línea:http://hdl.handle.net/10486/714216
https://dx.doi.org/10.1111/1365-2745.13248
Access Level:acceso abierto
Palabra clave:annual plants
coexistence
competition
functional traits
intraspecific trait variability
Medio Ambiente
Recursos Naturales
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spelling Trait hierarchies and intraspecific variability drive competitive interactions in Mediterranean annual plantsPérez Carmona, CarlosDe Bello, FrancescoMartín Azcarate, FranciscoPeco Vázquez, BegoñaMason, Norman W. H.annual plantscoexistencecompetitionfunctional traitsintraspecific trait variabilityMedio AmbienteRecursos NaturalesBoth intra- and interspecific differences in traits may modulate interactions between plants. Two mechanisms are hypothesized to regulate these effects: competitive hierarchies and trait dissimilarities, but it is unclear how the prevalence of each might depend on environmental conditions and on intra and interspecific differences. We sowed six replicates of all possible pairwise combinations across eight annual species (including conspecific competition and individuals without competitors), in pots under two levels of fertilization. We measured above- and below-ground traits and total biomass of the focal individuals. We expressed competition as the decrease in biomass of focal individuals relative to biomass without competition, and modelled competition using directional (hierarchy) or non-directional (dissimilarity) trait differences, with or without intraspecific variability (ITV). We found evidence of different trait hierarchies operating under different fertilization conditions but little support for trait dissimilarities. The negative effect of competition on focal plants increased with the height of the competitors in both of fertilization levels. Further, in unfertilized conditions, plants with lower specific leaf area (SLA) and larger root systems experienced less competition. Including ITV in trait hierarchies substantially improved our ability to predict the intensity of competition. This was partly due to ITV reducing competitive hierarchies. Synthesis. Our results underscore the importance of traits in driving interactions among plants. Competitive relationships between species depend on complex interactions between trait intra and interspecific differences and resource availability. ITV appears to be a mechanism capable of reducing trait hierarchies, and hence the intensity of competition between coexisting plantsFinancial support was provided by the Spanish MINECO (Projects CGL2014-53789-R and JCI-2016-30516) and the Madrid Regional Government (Projects REMEDINAL-3 and REMEDINAL TE). C.P.C. was supported by the Estonian Research Council (project PSG293), and by the European Union through the European Regional Development Fund (Centre of Excellence EcolChange)WileyBritish Ecological SocietyDepartamento de EcologíaFacultad de CienciasEcología y Conservación de Ecosistemas Terrestres (EXP C-049)20192019-08-19research articlehttp://purl.org/coar/resource_type/c_2df8fbb1AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10486/714216https://dx.doi.org/10.1111/1365-2745.13248reponame:Biblos-e Archivo. Repositorio Institucional de la UAMinstname:Universidad Autónoma de MadridInglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:repositorio.uam.es:10486/7142162026-06-23T12:46:27Z
dc.title.none.fl_str_mv Trait hierarchies and intraspecific variability drive competitive interactions in Mediterranean annual plants
title Trait hierarchies and intraspecific variability drive competitive interactions in Mediterranean annual plants
spellingShingle Trait hierarchies and intraspecific variability drive competitive interactions in Mediterranean annual plants
Pérez Carmona, Carlos
annual plants
coexistence
competition
functional traits
intraspecific trait variability
Medio Ambiente
Recursos Naturales
title_short Trait hierarchies and intraspecific variability drive competitive interactions in Mediterranean annual plants
title_full Trait hierarchies and intraspecific variability drive competitive interactions in Mediterranean annual plants
title_fullStr Trait hierarchies and intraspecific variability drive competitive interactions in Mediterranean annual plants
title_full_unstemmed Trait hierarchies and intraspecific variability drive competitive interactions in Mediterranean annual plants
title_sort Trait hierarchies and intraspecific variability drive competitive interactions in Mediterranean annual plants
dc.creator.none.fl_str_mv Pérez Carmona, Carlos
De Bello, Francesco
Martín Azcarate, Francisco
Peco Vázquez, Begoña
Mason, Norman W. H.
author Pérez Carmona, Carlos
author_facet Pérez Carmona, Carlos
De Bello, Francesco
Martín Azcarate, Francisco
Peco Vázquez, Begoña
Mason, Norman W. H.
author_role author
author2 De Bello, Francesco
Martín Azcarate, Francisco
Peco Vázquez, Begoña
Mason, Norman W. H.
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Departamento de Ecología
Facultad de Ciencias
Ecología y Conservación de Ecosistemas Terrestres (EXP C-049)
dc.subject.none.fl_str_mv annual plants
coexistence
competition
functional traits
intraspecific trait variability
Medio Ambiente
Recursos Naturales
topic annual plants
coexistence
competition
functional traits
intraspecific trait variability
Medio Ambiente
Recursos Naturales
description Both intra- and interspecific differences in traits may modulate interactions between plants. Two mechanisms are hypothesized to regulate these effects: competitive hierarchies and trait dissimilarities, but it is unclear how the prevalence of each might depend on environmental conditions and on intra and interspecific differences. We sowed six replicates of all possible pairwise combinations across eight annual species (including conspecific competition and individuals without competitors), in pots under two levels of fertilization. We measured above- and below-ground traits and total biomass of the focal individuals. We expressed competition as the decrease in biomass of focal individuals relative to biomass without competition, and modelled competition using directional (hierarchy) or non-directional (dissimilarity) trait differences, with or without intraspecific variability (ITV). We found evidence of different trait hierarchies operating under different fertilization conditions but little support for trait dissimilarities. The negative effect of competition on focal plants increased with the height of the competitors in both of fertilization levels. Further, in unfertilized conditions, plants with lower specific leaf area (SLA) and larger root systems experienced less competition. Including ITV in trait hierarchies substantially improved our ability to predict the intensity of competition. This was partly due to ITV reducing competitive hierarchies. Synthesis. Our results underscore the importance of traits in driving interactions among plants. Competitive relationships between species depend on complex interactions between trait intra and interspecific differences and resource availability. ITV appears to be a mechanism capable of reducing trait hierarchies, and hence the intensity of competition between coexisting plants
publishDate 2019
dc.date.none.fl_str_mv 2019
2019-08-19
dc.type.none.fl_str_mv research article
http://purl.org/coar/resource_type/c_2df8fbb1
AM
http://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10486/714216
https://dx.doi.org/10.1111/1365-2745.13248
url http://hdl.handle.net/10486/714216
https://dx.doi.org/10.1111/1365-2745.13248
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Wiley
British Ecological Society
publisher.none.fl_str_mv Wiley
British Ecological Society
dc.source.none.fl_str_mv reponame:Biblos-e Archivo. Repositorio Institucional de la UAM
instname:Universidad Autónoma de Madrid
instname_str Universidad Autónoma de Madrid
reponame_str Biblos-e Archivo. Repositorio Institucional de la UAM
collection Biblos-e Archivo. Repositorio Institucional de la UAM
repository.name.fl_str_mv
repository.mail.fl_str_mv
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