Root dynamics and interactions in a nutrient-poor and drying species-rich woodland

Autores
Teste, Francois Philippe; Quirk, Bryden; Marchesini, Victoria Angela; Veneklaas, Erik; Dixon, Kingsley W.; Lambers, H.
Año de publicación
2016
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
Climate change is decreasing the amount and delaying the start of winter rains in southern hemisphere Mediterranean ecosystems. Important components of western Australia’s Mediterranean biodiversity hotspot are the Proteaceae such as Banksia species. These plants rely on threshold-soil moisture levels to deploy their efficient nutrient-mobilising cluster roots to gather poorly-available nutrients from extremely phosphorus (P)-impoverished soils. The physiology of cluster-rooted plants has been well studied however their responses under climate change are largely unknown. We determined the root dynamics with minirhizotron measurements in a eucalypt-banksia woodland with or without irrigation to mimic the current reduced rainfall (based on long-term averages). Furthermore, we estimated the lifespan of the different root types, root intermingling, and cluster root P remobilisation. Irrigation produced a noticeable yet small increase in root production only in june. Standing crop was generally greater in non-irrigated plots and root mortality was independent of irrigation. Survival analyses of the different root types encountered with the cluster roots revealed considerable effects of soil depth on lifespan. Despite predictions from plant ecophysiological studies on the aboveground responses to a drying climate, we only found small transient effects on root production. However, there was a considerable effect of irrigation on the frequency of root intermingling and we suggest that root interactions may become less prominent under a drying climate. Root P remobilisation in cluster roots was efficient, only leaving ~10 354 % of P behind suggesting that if any form of nutrient-uptake facilitation takes place during root intermingling, it likely involves a form of kleptoparisitism. We propose that roots in this system and presumably other ecosystems show some resilience to a modified precipitation regime but this was not the case for interspecific root interactions. We suggest that if nutrient-uptake facilitative interactions decline under a drying climate so will root-driven mechanisms that promote plant species coexistence and the maintenance of diversity.
Fil: Teste, Francois Philippe. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Matemática Aplicada de San Luis "Prof. Ezio Marchi". Universidad Nacional de San Luis. Facultad de Ciencias Físico, Matemáticas y Naturales. Instituto de Matemática Aplicada de San Luis "Prof. Ezio Marchi"; Argentina
Fil: Quirk, Bryden. University of Western Australia; Australia
Fil: Marchesini, Victoria Angela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Matemática Aplicada de San Luis "Prof. Ezio Marchi". Universidad Nacional de San Luis. Facultad de Ciencias Físico, Matemáticas y Naturales. Instituto de Matemática Aplicada de San Luis "Prof. Ezio Marchi"; Argentina. University of Western Australia; Australia
Fil: Veneklaas, Erik. University of Western Australia; Australia
Fil: Dixon, Kingsley W.. Curtin University; Australia
Fil: Lambers, H.. University of Western Australia; Australia
VI Reunión Binacional de Ecología; XXVII Reunión Argentina de Ecología; XXIII Reunión de la Sociedad Chilena de Ecología: El desafío de integrar sociedad y naturaleza: propuestas desde la Ecología
Argentina
Asociación Argentina de Ecologia
Sociedad de Ecología de Chile
Materia
ROOT DYNAMICS
CLUSTER ROOTS
ROOT LIFESPAN
SOIL PHOSPHORUS
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/268762

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network_name_str CONICET Digital (CONICET)
spelling Root dynamics and interactions in a nutrient-poor and drying species-rich woodlandTeste, Francois PhilippeQuirk, BrydenMarchesini, Victoria AngelaVeneklaas, ErikDixon, Kingsley W.Lambers, H.ROOT DYNAMICSCLUSTER ROOTSROOT LIFESPANSOIL PHOSPHORUShttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Climate change is decreasing the amount and delaying the start of winter rains in southern hemisphere Mediterranean ecosystems. Important components of western Australia’s Mediterranean biodiversity hotspot are the Proteaceae such as Banksia species. These plants rely on threshold-soil moisture levels to deploy their efficient nutrient-mobilising cluster roots to gather poorly-available nutrients from extremely phosphorus (P)-impoverished soils. The physiology of cluster-rooted plants has been well studied however their responses under climate change are largely unknown. We determined the root dynamics with minirhizotron measurements in a eucalypt-banksia woodland with or without irrigation to mimic the current reduced rainfall (based on long-term averages). Furthermore, we estimated the lifespan of the different root types, root intermingling, and cluster root P remobilisation. Irrigation produced a noticeable yet small increase in root production only in june. Standing crop was generally greater in non-irrigated plots and root mortality was independent of irrigation. Survival analyses of the different root types encountered with the cluster roots revealed considerable effects of soil depth on lifespan. Despite predictions from plant ecophysiological studies on the aboveground responses to a drying climate, we only found small transient effects on root production. However, there was a considerable effect of irrigation on the frequency of root intermingling and we suggest that root interactions may become less prominent under a drying climate. Root P remobilisation in cluster roots was efficient, only leaving ~10 354 % of P behind suggesting that if any form of nutrient-uptake facilitation takes place during root intermingling, it likely involves a form of kleptoparisitism. We propose that roots in this system and presumably other ecosystems show some resilience to a modified precipitation regime but this was not the case for interspecific root interactions. We suggest that if nutrient-uptake facilitative interactions decline under a drying climate so will root-driven mechanisms that promote plant species coexistence and the maintenance of diversity.Fil: Teste, Francois Philippe. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Matemática Aplicada de San Luis "Prof. Ezio Marchi". Universidad Nacional de San Luis. Facultad de Ciencias Físico, Matemáticas y Naturales. Instituto de Matemática Aplicada de San Luis "Prof. Ezio Marchi"; ArgentinaFil: Quirk, Bryden. University of Western Australia; AustraliaFil: Marchesini, Victoria Angela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Matemática Aplicada de San Luis "Prof. Ezio Marchi". Universidad Nacional de San Luis. Facultad de Ciencias Físico, Matemáticas y Naturales. Instituto de Matemática Aplicada de San Luis "Prof. Ezio Marchi"; Argentina. University of Western Australia; AustraliaFil: Veneklaas, Erik. University of Western Australia; AustraliaFil: Dixon, Kingsley W.. Curtin University; AustraliaFil: Lambers, H.. University of Western Australia; AustraliaVI Reunión Binacional de Ecología; XXVII Reunión Argentina de Ecología; XXIII Reunión de la Sociedad Chilena de Ecología: El desafío de integrar sociedad y naturaleza: propuestas desde la EcologíaArgentinaAsociación Argentina de EcologiaSociedad de Ecología de ChileAsociación Argentina de Ecología2016info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectReuniónBookhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/268762Root dynamics and interactions in a nutrient-poor and drying species-rich woodland; VI Reunión Binacional de Ecología; XXVII Reunión Argentina de Ecología; XXIII Reunión de la Sociedad Chilena de Ecología: El desafío de integrar sociedad y naturaleza: propuestas desde la Ecología; Argentina; 2016; 353-354CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://asaeargentina.com.ar/docs/rae/XXVII_RAE.pdfInternacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:57:27Zoai:ri.conicet.gov.ar:11336/268762instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:57:27.671CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Root dynamics and interactions in a nutrient-poor and drying species-rich woodland
title Root dynamics and interactions in a nutrient-poor and drying species-rich woodland
spellingShingle Root dynamics and interactions in a nutrient-poor and drying species-rich woodland
Teste, Francois Philippe
ROOT DYNAMICS
CLUSTER ROOTS
ROOT LIFESPAN
SOIL PHOSPHORUS
title_short Root dynamics and interactions in a nutrient-poor and drying species-rich woodland
title_full Root dynamics and interactions in a nutrient-poor and drying species-rich woodland
title_fullStr Root dynamics and interactions in a nutrient-poor and drying species-rich woodland
title_full_unstemmed Root dynamics and interactions in a nutrient-poor and drying species-rich woodland
title_sort Root dynamics and interactions in a nutrient-poor and drying species-rich woodland
dc.creator.none.fl_str_mv Teste, Francois Philippe
Quirk, Bryden
Marchesini, Victoria Angela
Veneklaas, Erik
Dixon, Kingsley W.
Lambers, H.
author Teste, Francois Philippe
author_facet Teste, Francois Philippe
Quirk, Bryden
Marchesini, Victoria Angela
Veneklaas, Erik
Dixon, Kingsley W.
Lambers, H.
author_role author
author2 Quirk, Bryden
Marchesini, Victoria Angela
Veneklaas, Erik
Dixon, Kingsley W.
Lambers, H.
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv ROOT DYNAMICS
CLUSTER ROOTS
ROOT LIFESPAN
SOIL PHOSPHORUS
topic ROOT DYNAMICS
CLUSTER ROOTS
ROOT LIFESPAN
SOIL PHOSPHORUS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Climate change is decreasing the amount and delaying the start of winter rains in southern hemisphere Mediterranean ecosystems. Important components of western Australia’s Mediterranean biodiversity hotspot are the Proteaceae such as Banksia species. These plants rely on threshold-soil moisture levels to deploy their efficient nutrient-mobilising cluster roots to gather poorly-available nutrients from extremely phosphorus (P)-impoverished soils. The physiology of cluster-rooted plants has been well studied however their responses under climate change are largely unknown. We determined the root dynamics with minirhizotron measurements in a eucalypt-banksia woodland with or without irrigation to mimic the current reduced rainfall (based on long-term averages). Furthermore, we estimated the lifespan of the different root types, root intermingling, and cluster root P remobilisation. Irrigation produced a noticeable yet small increase in root production only in june. Standing crop was generally greater in non-irrigated plots and root mortality was independent of irrigation. Survival analyses of the different root types encountered with the cluster roots revealed considerable effects of soil depth on lifespan. Despite predictions from plant ecophysiological studies on the aboveground responses to a drying climate, we only found small transient effects on root production. However, there was a considerable effect of irrigation on the frequency of root intermingling and we suggest that root interactions may become less prominent under a drying climate. Root P remobilisation in cluster roots was efficient, only leaving ~10 354 % of P behind suggesting that if any form of nutrient-uptake facilitation takes place during root intermingling, it likely involves a form of kleptoparisitism. We propose that roots in this system and presumably other ecosystems show some resilience to a modified precipitation regime but this was not the case for interspecific root interactions. We suggest that if nutrient-uptake facilitative interactions decline under a drying climate so will root-driven mechanisms that promote plant species coexistence and the maintenance of diversity.
Fil: Teste, Francois Philippe. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Matemática Aplicada de San Luis "Prof. Ezio Marchi". Universidad Nacional de San Luis. Facultad de Ciencias Físico, Matemáticas y Naturales. Instituto de Matemática Aplicada de San Luis "Prof. Ezio Marchi"; Argentina
Fil: Quirk, Bryden. University of Western Australia; Australia
Fil: Marchesini, Victoria Angela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Matemática Aplicada de San Luis "Prof. Ezio Marchi". Universidad Nacional de San Luis. Facultad de Ciencias Físico, Matemáticas y Naturales. Instituto de Matemática Aplicada de San Luis "Prof. Ezio Marchi"; Argentina. University of Western Australia; Australia
Fil: Veneklaas, Erik. University of Western Australia; Australia
Fil: Dixon, Kingsley W.. Curtin University; Australia
Fil: Lambers, H.. University of Western Australia; Australia
VI Reunión Binacional de Ecología; XXVII Reunión Argentina de Ecología; XXIII Reunión de la Sociedad Chilena de Ecología: El desafío de integrar sociedad y naturaleza: propuestas desde la Ecología
Argentina
Asociación Argentina de Ecologia
Sociedad de Ecología de Chile
description Climate change is decreasing the amount and delaying the start of winter rains in southern hemisphere Mediterranean ecosystems. Important components of western Australia’s Mediterranean biodiversity hotspot are the Proteaceae such as Banksia species. These plants rely on threshold-soil moisture levels to deploy their efficient nutrient-mobilising cluster roots to gather poorly-available nutrients from extremely phosphorus (P)-impoverished soils. The physiology of cluster-rooted plants has been well studied however their responses under climate change are largely unknown. We determined the root dynamics with minirhizotron measurements in a eucalypt-banksia woodland with or without irrigation to mimic the current reduced rainfall (based on long-term averages). Furthermore, we estimated the lifespan of the different root types, root intermingling, and cluster root P remobilisation. Irrigation produced a noticeable yet small increase in root production only in june. Standing crop was generally greater in non-irrigated plots and root mortality was independent of irrigation. Survival analyses of the different root types encountered with the cluster roots revealed considerable effects of soil depth on lifespan. Despite predictions from plant ecophysiological studies on the aboveground responses to a drying climate, we only found small transient effects on root production. However, there was a considerable effect of irrigation on the frequency of root intermingling and we suggest that root interactions may become less prominent under a drying climate. Root P remobilisation in cluster roots was efficient, only leaving ~10 354 % of P behind suggesting that if any form of nutrient-uptake facilitation takes place during root intermingling, it likely involves a form of kleptoparisitism. We propose that roots in this system and presumably other ecosystems show some resilience to a modified precipitation regime but this was not the case for interspecific root interactions. We suggest that if nutrient-uptake facilitative interactions decline under a drying climate so will root-driven mechanisms that promote plant species coexistence and the maintenance of diversity.
publishDate 2016
dc.date.none.fl_str_mv 2016
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
Reunión
Book
http://purl.org/coar/resource_type/c_5794
info:ar-repo/semantics/documentoDeConferencia
status_str publishedVersion
format conferenceObject
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/268762
Root dynamics and interactions in a nutrient-poor and drying species-rich woodland; VI Reunión Binacional de Ecología; XXVII Reunión Argentina de Ecología; XXIII Reunión de la Sociedad Chilena de Ecología: El desafío de integrar sociedad y naturaleza: propuestas desde la Ecología; Argentina; 2016; 353-354
CONICET Digital
CONICET
url http://hdl.handle.net/11336/268762
identifier_str_mv Root dynamics and interactions in a nutrient-poor and drying species-rich woodland; VI Reunión Binacional de Ecología; XXVII Reunión Argentina de Ecología; XXIII Reunión de la Sociedad Chilena de Ecología: El desafío de integrar sociedad y naturaleza: propuestas desde la Ecología; Argentina; 2016; 353-354
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://asaeargentina.com.ar/docs/rae/XXVII_RAE.pdf
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.coverage.none.fl_str_mv Internacional
dc.publisher.none.fl_str_mv Asociación Argentina de Ecología
publisher.none.fl_str_mv Asociación Argentina de Ecología
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repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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