Intransitivity increases plant functional diversity by limiting dominance in drylands worldwide
International audience Biotic interactions are key determinants of plant community structure. Indirect interactions such as intransitivity (i.e., the absence of competitive hierarchies among species) have been hypothesized to benefit diversity within plant communities. However, their effect on funct...
Published in: | Journal of Ecology |
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Main Authors: | , , , |
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Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2019
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Online Access: | https://hal.archives-ouvertes.fr/hal-01852771 https://doi.org/10.1111/1365-2745.13018 |
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ftunivnantes:oai:HAL:hal-01852771v1 |
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openpolar |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
plant height intransitive interactions functional diversity determinants of plant community diversity and structure specific leaf area spatial association patterns climate community assembly [SDE]Environmental Sciences |
spellingShingle |
plant height intransitive interactions functional diversity determinants of plant community diversity and structure specific leaf area spatial association patterns climate community assembly [SDE]Environmental Sciences Saiz, Hugo Le Bagousse-Pinguet, Yoann Gross, Nicolas Maestre, Fernando Intransitivity increases plant functional diversity by limiting dominance in drylands worldwide |
topic_facet |
plant height intransitive interactions functional diversity determinants of plant community diversity and structure specific leaf area spatial association patterns climate community assembly [SDE]Environmental Sciences |
description |
International audience Biotic interactions are key determinants of plant community structure. Indirect interactions such as intransitivity (i.e., the absence of competitive hierarchies among species) have been hypothesized to benefit diversity within plant communities. However, their effect on functional diversity remains scarcely explored in real communities. Here, we develop a novel approach to infer intransitivity from plant spatial patterns and functional traits (height and specific leaf area) and quantify its effect on different components of plant diversity along environmental gradients in 100 drylands from all continents except Antarctica. We first calculated the spatial association pattern for all perennials to infer competition between species. Trait values were used as a proxy of competitive hierarchies to infer the direction of these interactions. We used multiple regression models to evaluate how intransitivity responds to environmental variables (mean annual temperature and precipitation, precipitation seasonality, soil pH, sand content and woody cover). We also used confirmatory path analysis to evaluate the effects of intransitivity on species richness and evenness, trait dispersion and functional diversity. Intransitivity mostly responded to climatic variables and significantly increased with precipitation scarcity and seasonality. We found that intransitivity had significant effects on functional diversity, mostly by promoting plant community evenness. However, the dominance of woody vegetation (steppes versus shrublands) modulated this effect. Synthesis. Intransitivity increased the functional diversity of drylands, particularly under high rainfall seasonality, by limiting functionally dominant species. Our findings specify how intransitivity structures the functional diversity of dryland vegetation worldwide. Intransitivity may be particularly important in ecosystems where the availability of abiotic resources changes over time, thereby breaking down inherent competitive hierarchies between ... |
author2 |
Escuela Superior de Ciencias Experimentales y Tecnología SPAIN Universidad Rey Juan Carlos Madrid (URJC) Escuela Supererio de Ciencias Experimentales y Tecnologia, Departamento de Biologia y Geologia, Fisica y Quimica Inorganica, Area de Biodiversidad y Conservacion Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) Institut National de la Recherche Agronomique (INRA)-La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) European Project: 609398,EC:FP7:PEOPLE,FP7-PEOPLE-2013-COFUND,AGREENSKILLSPLUS(2014) |
format |
Article in Journal/Newspaper |
author |
Saiz, Hugo Le Bagousse-Pinguet, Yoann Gross, Nicolas Maestre, Fernando |
author_facet |
Saiz, Hugo Le Bagousse-Pinguet, Yoann Gross, Nicolas Maestre, Fernando |
author_sort |
Saiz, Hugo |
title |
Intransitivity increases plant functional diversity by limiting dominance in drylands worldwide |
title_short |
Intransitivity increases plant functional diversity by limiting dominance in drylands worldwide |
title_full |
Intransitivity increases plant functional diversity by limiting dominance in drylands worldwide |
title_fullStr |
Intransitivity increases plant functional diversity by limiting dominance in drylands worldwide |
title_full_unstemmed |
Intransitivity increases plant functional diversity by limiting dominance in drylands worldwide |
title_sort |
intransitivity increases plant functional diversity by limiting dominance in drylands worldwide |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://hal.archives-ouvertes.fr/hal-01852771 https://doi.org/10.1111/1365-2745.13018 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
ISSN: 0022-0477 EISSN: 1365-2745 Journal of Ecology https://hal.archives-ouvertes.fr/hal-01852771 Journal of Ecology, 2019, 107 (1), pp.240-252. ⟨10.1111/1365-2745.13018⟩ |
op_relation |
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op_doi |
https://doi.org/10.1111/1365-2745.13018 |
container_title |
Journal of Ecology |
container_volume |
107 |
container_issue |
1 |
container_start_page |
240 |
op_container_end_page |
252 |
_version_ |
1766201577727590400 |
spelling |
ftunivnantes:oai:HAL:hal-01852771v1 2023-05-15T13:44:26+02:00 Intransitivity increases plant functional diversity by limiting dominance in drylands worldwide Saiz, Hugo Le Bagousse-Pinguet, Yoann Gross, Nicolas Maestre, Fernando Escuela Superior de Ciencias Experimentales y Tecnología SPAIN Universidad Rey Juan Carlos Madrid (URJC) Escuela Supererio de Ciencias Experimentales y Tecnologia, Departamento de Biologia y Geologia, Fisica y Quimica Inorganica, Area de Biodiversidad y Conservacion Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) Institut National de la Recherche Agronomique (INRA)-La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) European Project: 609398,EC:FP7:PEOPLE,FP7-PEOPLE-2013-COFUND,AGREENSKILLSPLUS(2014) 2019 https://hal.archives-ouvertes.fr/hal-01852771 https://doi.org/10.1111/1365-2745.13018 en eng HAL CCSD Wiley info:eu-repo/semantics/altIdentifier/doi/10.1111/1365-2745.13018 info:eu-repo/semantics/altIdentifier/pmid/30546158 info:eu-repo/grantAgreement/EC/FP7/609398/EU/AgreenSkills+/AGREENSKILLSPLUS hal-01852771 https://hal.archives-ouvertes.fr/hal-01852771 doi:10.1111/1365-2745.13018 PRODINRA: 466673 PUBMED: 30546158 PUBMEDCENTRAL: PMC6287709 WOS: 000459070600021 ISSN: 0022-0477 EISSN: 1365-2745 Journal of Ecology https://hal.archives-ouvertes.fr/hal-01852771 Journal of Ecology, 2019, 107 (1), pp.240-252. ⟨10.1111/1365-2745.13018⟩ plant height intransitive interactions functional diversity determinants of plant community diversity and structure specific leaf area spatial association patterns climate community assembly [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2019 ftunivnantes https://doi.org/10.1111/1365-2745.13018 2023-01-04T00:03:58Z International audience Biotic interactions are key determinants of plant community structure. Indirect interactions such as intransitivity (i.e., the absence of competitive hierarchies among species) have been hypothesized to benefit diversity within plant communities. However, their effect on functional diversity remains scarcely explored in real communities. Here, we develop a novel approach to infer intransitivity from plant spatial patterns and functional traits (height and specific leaf area) and quantify its effect on different components of plant diversity along environmental gradients in 100 drylands from all continents except Antarctica. We first calculated the spatial association pattern for all perennials to infer competition between species. Trait values were used as a proxy of competitive hierarchies to infer the direction of these interactions. We used multiple regression models to evaluate how intransitivity responds to environmental variables (mean annual temperature and precipitation, precipitation seasonality, soil pH, sand content and woody cover). We also used confirmatory path analysis to evaluate the effects of intransitivity on species richness and evenness, trait dispersion and functional diversity. Intransitivity mostly responded to climatic variables and significantly increased with precipitation scarcity and seasonality. We found that intransitivity had significant effects on functional diversity, mostly by promoting plant community evenness. However, the dominance of woody vegetation (steppes versus shrublands) modulated this effect. Synthesis. Intransitivity increased the functional diversity of drylands, particularly under high rainfall seasonality, by limiting functionally dominant species. Our findings specify how intransitivity structures the functional diversity of dryland vegetation worldwide. Intransitivity may be particularly important in ecosystems where the availability of abiotic resources changes over time, thereby breaking down inherent competitive hierarchies between ... Article in Journal/Newspaper Antarc* Antarctica Université de Nantes: HAL-UNIV-NANTES Journal of Ecology 107 1 240 252 |