Diversity mediates the responses of invertebrate density to duration and frequency of rivers annual drying regime

Predicting the impacts of global change on highly dynamic ecosystems requires a better understanding of how communities respond to disturbance duration, frequency and timing. Intermittent rivers and ephemeral streams are dynamic ecosystems that are recognized as the most common fluvial ecosystem glo...

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Autores: Arias-Real, Rebeca, Gutiérrez-Cánovas, Cayetano, Menéndez López, Margarita, Granados, Verónica, Muñoz Gràcia, Isabel
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2021
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/183557
Acceso en línea:https://hdl.handle.net/2445/183557
Access Level:acceso abierto
Palabra clave:Biodiversitat
Sequeres
Cursos d'aigua
Mediterrània (Regió)
Biodiversity
Droughts
Rivers
Mediterranean Region
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spelling Diversity mediates the responses of invertebrate density to duration and frequency of rivers annual drying regimeArias-Real, RebecaGutiérrez-Cánovas, CayetanoMenéndez López, MargaritaGranados, VerónicaMuñoz Gràcia, IsabelBiodiversitatSequeresCursos d'aiguaMediterrània (Regió)BiodiversityDroughtsRiversMediterranean RegionPredicting the impacts of global change on highly dynamic ecosystems requires a better understanding of how communities respond to disturbance duration, frequency and timing. Intermittent rivers and ephemeral streams are dynamic ecosystems that are recognized as the most common fluvial ecosystem globally. The complexity of the drying process can give rise to different annual and antecedent hydrological conditions, but their effect on aquatic communities remains unclear. Here, using aquatic invertebrates from 33 streams across a flow-intermittence gradient, we assessed how annual (drying duration and frequency) and recent drying characteristics (duration of the last dry period and flowing duration since the last rewetting) affect the density and diversity metrics of communities and trophic groups while controlling for other key abiotic factors (dissolved oxygen and altitude). We characterized invertebrate communities using taxonomy and functional traits to capture biological features that increase vulnerability to drying. In addition, using structural equation modelling (SEM), we evaluated pathways by which drying characteristics directly impact invertebrate density and whether diversity indirectly mediates such relationships. We show that drying frequency drove reductions in diversity at the community level and within trophic groups, whereas both the drying duration and frequency had a negative influence on density metrics. Reductions in taxonomic richness were linked to increased annual drying duration, whereas functional diversity declined in response to annual drying frequency. Filterer, predator and shredder trophic groups exhibited the strongest negative responses to drying. Recent drying characteristics had a minor effect on density and diversity metrics. Our SEM results demonstrated that diversity mediates the negative impacts of annual drying duration and frequency on invertebrate density through reductions in their taxonomic richness and functional diversity. Our results underscore the importance of considering multiple drying characteristics together with the interdependence of density and diversity to better anticipate drying responses in freshwater ecosystems. Keywords: biodiversity-ecosystem functioning, drying, flow intermittence, functional traits, intermittent rivers and ephemeral streams, Mediterranean streamsWiley2022202220212022info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersion13 p.application/pdfhttps://hdl.handle.net/2445/183557Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésVersió postprint del document publicat a: https://doi.org/10.1111/oik.08718Oikos, 2021, vol. 130, num. 12, p. 2148-2160https://doi.org/10.1111/oik.08718(c) Oikos Editorial Office, 2021info:eu-repo/semantics/openAccessoai:recercat.cat:2445/1835572026-05-29T05:05:01Z
dc.title.none.fl_str_mv Diversity mediates the responses of invertebrate density to duration and frequency of rivers annual drying regime
title Diversity mediates the responses of invertebrate density to duration and frequency of rivers annual drying regime
spellingShingle Diversity mediates the responses of invertebrate density to duration and frequency of rivers annual drying regime
Arias-Real, Rebeca
Biodiversitat
Sequeres
Cursos d'aigua
Mediterrània (Regió)
Biodiversity
Droughts
Rivers
Mediterranean Region
title_short Diversity mediates the responses of invertebrate density to duration and frequency of rivers annual drying regime
title_full Diversity mediates the responses of invertebrate density to duration and frequency of rivers annual drying regime
title_fullStr Diversity mediates the responses of invertebrate density to duration and frequency of rivers annual drying regime
title_full_unstemmed Diversity mediates the responses of invertebrate density to duration and frequency of rivers annual drying regime
title_sort Diversity mediates the responses of invertebrate density to duration and frequency of rivers annual drying regime
dc.creator.none.fl_str_mv Arias-Real, Rebeca
Gutiérrez-Cánovas, Cayetano
Menéndez López, Margarita
Granados, Verónica
Muñoz Gràcia, Isabel
author Arias-Real, Rebeca
author_facet Arias-Real, Rebeca
Gutiérrez-Cánovas, Cayetano
Menéndez López, Margarita
Granados, Verónica
Muñoz Gràcia, Isabel
author_role author
author2 Gutiérrez-Cánovas, Cayetano
Menéndez López, Margarita
Granados, Verónica
Muñoz Gràcia, Isabel
author2_role author
author
author
author
dc.subject.none.fl_str_mv Biodiversitat
Sequeres
Cursos d'aigua
Mediterrània (Regió)
Biodiversity
Droughts
Rivers
Mediterranean Region
topic Biodiversitat
Sequeres
Cursos d'aigua
Mediterrània (Regió)
Biodiversity
Droughts
Rivers
Mediterranean Region
description Predicting the impacts of global change on highly dynamic ecosystems requires a better understanding of how communities respond to disturbance duration, frequency and timing. Intermittent rivers and ephemeral streams are dynamic ecosystems that are recognized as the most common fluvial ecosystem globally. The complexity of the drying process can give rise to different annual and antecedent hydrological conditions, but their effect on aquatic communities remains unclear. Here, using aquatic invertebrates from 33 streams across a flow-intermittence gradient, we assessed how annual (drying duration and frequency) and recent drying characteristics (duration of the last dry period and flowing duration since the last rewetting) affect the density and diversity metrics of communities and trophic groups while controlling for other key abiotic factors (dissolved oxygen and altitude). We characterized invertebrate communities using taxonomy and functional traits to capture biological features that increase vulnerability to drying. In addition, using structural equation modelling (SEM), we evaluated pathways by which drying characteristics directly impact invertebrate density and whether diversity indirectly mediates such relationships. We show that drying frequency drove reductions in diversity at the community level and within trophic groups, whereas both the drying duration and frequency had a negative influence on density metrics. Reductions in taxonomic richness were linked to increased annual drying duration, whereas functional diversity declined in response to annual drying frequency. Filterer, predator and shredder trophic groups exhibited the strongest negative responses to drying. Recent drying characteristics had a minor effect on density and diversity metrics. Our SEM results demonstrated that diversity mediates the negative impacts of annual drying duration and frequency on invertebrate density through reductions in their taxonomic richness and functional diversity. Our results underscore the importance of considering multiple drying characteristics together with the interdependence of density and diversity to better anticipate drying responses in freshwater ecosystems. Keywords: biodiversity-ecosystem functioning, drying, flow intermittence, functional traits, intermittent rivers and ephemeral streams, Mediterranean streams
publishDate 2021
dc.date.none.fl_str_mv 2021
2022
2022
2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/183557
url https://hdl.handle.net/2445/183557
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Versió postprint del document publicat a: https://doi.org/10.1111/oik.08718
Oikos, 2021, vol. 130, num. 12, p. 2148-2160
https://doi.org/10.1111/oik.08718
dc.rights.none.fl_str_mv (c) Oikos Editorial Office, 2021
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) Oikos Editorial Office, 2021
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 13 p.
application/pdf
dc.publisher.none.fl_str_mv Wiley
publisher.none.fl_str_mv Wiley
dc.source.none.fl_str_mv Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812429

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