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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/268762
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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/ |
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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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reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
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Consejo Nacional de Investigaciones Científicas y Técnicas |
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CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.mail.fl_str_mv |
dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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13.070432 |