Seed dispersal by wind: towards a conceptual framework of seed abscission and its contribution to long-distance dispersal
- Autores
- Pazos, Gustavo Enrique; Greene, David F.; Katul, Gabriel; Bertiller, Monica Beatriz; Soons, Merel B.
- Año de publicación
- 2013
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- 1. Diaspore abscission determines many aspects of seed dispersal by wind. While there is yet no complete mechanistic framework for understanding abscission by wind, empirical studies to date have suggested that abscission generally (i) occurs above some threshold wind speed and (ii) depends on the drag force generated by the wind. 2. We revisit these findings and formulate two alternative hypotheses for abscission mechanisms based on a simple model of a forced harmonic oscillator: large diaspore displacement [through a maximum deflection threshold, (MDT)] and material fatigue [through a maximum cumulative stress threshold (MCST)]. We use simulations of abscission events based on these hypotheses and experiments on diaspore abscission of three Patagonian grasses and a cosmopolitan herb to test the performance of two abscission functions differing in whether they have a threshold wind speed for abscission. We also quantify the effects of non-random diaspore abscission on dispersal distances using a well-tested model for seed dispersal by wind. 3. Both the MDT and MCST hypotheses appear realistic and indicate that while the instantaneous wind speed determines abscission, the history of wind speeds experienced prior to the detachment from the plant also plays a role. 4. An evaluation of abscission functions against simulated and experimental abscission data shows that while the presence of a threshold wind speed in theory appears unrealistic, in practice a threshold may appear to exist in high-wind-speed environments where all diaspores are blown off the plant before the abscission layer can develop sufficiently to break during lower wind speeds. 5. Under non-random diaspore abscission, high-wind-speed events during otherwise calm periods increase long-distance dispersal (LDD), thereby decreasing differences in dispersal distances between low- and high-wind-speed environments. 6. Synthesis. We formulated two realistic mechanisms of diaspore abscission by applying concepts from materials science: large diaspore displacement and material fatigue. These reveal that the ambient wind speed ‘history’ experienced by a diaspore plays an important role in the timing of abscission and in the distance travelled, without any thresholds, and that the effect of the diaspore–wind interaction on LDD varies between environments with different wind speed regimes.
Fil: Pazos, Gustavo Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
Fil: Greene, David F.. Concordia University. Department of Geography, Planning and Environment; Canadá
Fil: Katul, Gabriel. University Of Duke; Estados Unidos
Fil: Bertiller, Monica Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
Fil: Soons, Merel B.. Utrecht Univeristy; Países Bajos - Materia
-
Anemochory
Celc
Model Diaspore Abscission - 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:11336/5378
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oai:ri.conicet.gov.ar:11336/5378 |
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CONICET Digital (CONICET) |
spelling |
Seed dispersal by wind: towards a conceptual framework of seed abscission and its contribution to long-distance dispersalPazos, Gustavo EnriqueGreene, David F.Katul, GabrielBertiller, Monica BeatrizSoons, Merel B.AnemochoryCelcModel Diaspore Abscissionhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/11. Diaspore abscission determines many aspects of seed dispersal by wind. While there is yet no complete mechanistic framework for understanding abscission by wind, empirical studies to date have suggested that abscission generally (i) occurs above some threshold wind speed and (ii) depends on the drag force generated by the wind. 2. We revisit these findings and formulate two alternative hypotheses for abscission mechanisms based on a simple model of a forced harmonic oscillator: large diaspore displacement [through a maximum deflection threshold, (MDT)] and material fatigue [through a maximum cumulative stress threshold (MCST)]. We use simulations of abscission events based on these hypotheses and experiments on diaspore abscission of three Patagonian grasses and a cosmopolitan herb to test the performance of two abscission functions differing in whether they have a threshold wind speed for abscission. We also quantify the effects of non-random diaspore abscission on dispersal distances using a well-tested model for seed dispersal by wind. 3. Both the MDT and MCST hypotheses appear realistic and indicate that while the instantaneous wind speed determines abscission, the history of wind speeds experienced prior to the detachment from the plant also plays a role. 4. An evaluation of abscission functions against simulated and experimental abscission data shows that while the presence of a threshold wind speed in theory appears unrealistic, in practice a threshold may appear to exist in high-wind-speed environments where all diaspores are blown off the plant before the abscission layer can develop sufficiently to break during lower wind speeds. 5. Under non-random diaspore abscission, high-wind-speed events during otherwise calm periods increase long-distance dispersal (LDD), thereby decreasing differences in dispersal distances between low- and high-wind-speed environments. 6. Synthesis. We formulated two realistic mechanisms of diaspore abscission by applying concepts from materials science: large diaspore displacement and material fatigue. These reveal that the ambient wind speed ‘history’ experienced by a diaspore plays an important role in the timing of abscission and in the distance travelled, without any thresholds, and that the effect of the diaspore–wind interaction on LDD varies between environments with different wind speed regimes.Fil: Pazos, Gustavo Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; ArgentinaFil: Greene, David F.. Concordia University. Department of Geography, Planning and Environment; CanadáFil: Katul, Gabriel. University Of Duke; Estados UnidosFil: Bertiller, Monica Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; ArgentinaFil: Soons, Merel B.. Utrecht Univeristy; Países BajosWiley2013-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/5378Pazos, Gustavo Enrique; Greene, David F.; Katul, Gabriel; Bertiller, Monica Beatriz; Soons, Merel B.; Seed dispersal by wind: towards a conceptual framework of seed abscission and its contribution to long-distance dispersal; Wiley; Journal of Ecology; 101; 4; 3-2013; 889-9040022-0477enginfo:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/wol1/doi/10.1111/1365-2745.12103/abstractinfo:eu-repo/semantics/altIdentifier/doi/10.1111/1365-2745.12103info:eu-repo/semantics/altIdentifier/doi/info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:17:02Zoai:ri.conicet.gov.ar:11336/5378instacron: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 10:17:03.305CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Seed dispersal by wind: towards a conceptual framework of seed abscission and its contribution to long-distance dispersal |
title |
Seed dispersal by wind: towards a conceptual framework of seed abscission and its contribution to long-distance dispersal |
spellingShingle |
Seed dispersal by wind: towards a conceptual framework of seed abscission and its contribution to long-distance dispersal Pazos, Gustavo Enrique Anemochory Celc Model Diaspore Abscission |
title_short |
Seed dispersal by wind: towards a conceptual framework of seed abscission and its contribution to long-distance dispersal |
title_full |
Seed dispersal by wind: towards a conceptual framework of seed abscission and its contribution to long-distance dispersal |
title_fullStr |
Seed dispersal by wind: towards a conceptual framework of seed abscission and its contribution to long-distance dispersal |
title_full_unstemmed |
Seed dispersal by wind: towards a conceptual framework of seed abscission and its contribution to long-distance dispersal |
title_sort |
Seed dispersal by wind: towards a conceptual framework of seed abscission and its contribution to long-distance dispersal |
dc.creator.none.fl_str_mv |
Pazos, Gustavo Enrique Greene, David F. Katul, Gabriel Bertiller, Monica Beatriz Soons, Merel B. |
author |
Pazos, Gustavo Enrique |
author_facet |
Pazos, Gustavo Enrique Greene, David F. Katul, Gabriel Bertiller, Monica Beatriz Soons, Merel B. |
author_role |
author |
author2 |
Greene, David F. Katul, Gabriel Bertiller, Monica Beatriz Soons, Merel B. |
author2_role |
author author author author |
dc.subject.none.fl_str_mv |
Anemochory Celc Model Diaspore Abscission |
topic |
Anemochory Celc Model Diaspore Abscission |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
1. Diaspore abscission determines many aspects of seed dispersal by wind. While there is yet no complete mechanistic framework for understanding abscission by wind, empirical studies to date have suggested that abscission generally (i) occurs above some threshold wind speed and (ii) depends on the drag force generated by the wind. 2. We revisit these findings and formulate two alternative hypotheses for abscission mechanisms based on a simple model of a forced harmonic oscillator: large diaspore displacement [through a maximum deflection threshold, (MDT)] and material fatigue [through a maximum cumulative stress threshold (MCST)]. We use simulations of abscission events based on these hypotheses and experiments on diaspore abscission of three Patagonian grasses and a cosmopolitan herb to test the performance of two abscission functions differing in whether they have a threshold wind speed for abscission. We also quantify the effects of non-random diaspore abscission on dispersal distances using a well-tested model for seed dispersal by wind. 3. Both the MDT and MCST hypotheses appear realistic and indicate that while the instantaneous wind speed determines abscission, the history of wind speeds experienced prior to the detachment from the plant also plays a role. 4. An evaluation of abscission functions against simulated and experimental abscission data shows that while the presence of a threshold wind speed in theory appears unrealistic, in practice a threshold may appear to exist in high-wind-speed environments where all diaspores are blown off the plant before the abscission layer can develop sufficiently to break during lower wind speeds. 5. Under non-random diaspore abscission, high-wind-speed events during otherwise calm periods increase long-distance dispersal (LDD), thereby decreasing differences in dispersal distances between low- and high-wind-speed environments. 6. Synthesis. We formulated two realistic mechanisms of diaspore abscission by applying concepts from materials science: large diaspore displacement and material fatigue. These reveal that the ambient wind speed ‘history’ experienced by a diaspore plays an important role in the timing of abscission and in the distance travelled, without any thresholds, and that the effect of the diaspore–wind interaction on LDD varies between environments with different wind speed regimes. Fil: Pazos, Gustavo Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina Fil: Greene, David F.. Concordia University. Department of Geography, Planning and Environment; Canadá Fil: Katul, Gabriel. University Of Duke; Estados Unidos Fil: Bertiller, Monica Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina Fil: Soons, Merel B.. Utrecht Univeristy; Países Bajos |
description |
1. Diaspore abscission determines many aspects of seed dispersal by wind. While there is yet no complete mechanistic framework for understanding abscission by wind, empirical studies to date have suggested that abscission generally (i) occurs above some threshold wind speed and (ii) depends on the drag force generated by the wind. 2. We revisit these findings and formulate two alternative hypotheses for abscission mechanisms based on a simple model of a forced harmonic oscillator: large diaspore displacement [through a maximum deflection threshold, (MDT)] and material fatigue [through a maximum cumulative stress threshold (MCST)]. We use simulations of abscission events based on these hypotheses and experiments on diaspore abscission of three Patagonian grasses and a cosmopolitan herb to test the performance of two abscission functions differing in whether they have a threshold wind speed for abscission. We also quantify the effects of non-random diaspore abscission on dispersal distances using a well-tested model for seed dispersal by wind. 3. Both the MDT and MCST hypotheses appear realistic and indicate that while the instantaneous wind speed determines abscission, the history of wind speeds experienced prior to the detachment from the plant also plays a role. 4. An evaluation of abscission functions against simulated and experimental abscission data shows that while the presence of a threshold wind speed in theory appears unrealistic, in practice a threshold may appear to exist in high-wind-speed environments where all diaspores are blown off the plant before the abscission layer can develop sufficiently to break during lower wind speeds. 5. Under non-random diaspore abscission, high-wind-speed events during otherwise calm periods increase long-distance dispersal (LDD), thereby decreasing differences in dispersal distances between low- and high-wind-speed environments. 6. Synthesis. We formulated two realistic mechanisms of diaspore abscission by applying concepts from materials science: large diaspore displacement and material fatigue. These reveal that the ambient wind speed ‘history’ experienced by a diaspore plays an important role in the timing of abscission and in the distance travelled, without any thresholds, and that the effect of the diaspore–wind interaction on LDD varies between environments with different wind speed regimes. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-03 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://hdl.handle.net/11336/5378 Pazos, Gustavo Enrique; Greene, David F.; Katul, Gabriel; Bertiller, Monica Beatriz; Soons, Merel B.; Seed dispersal by wind: towards a conceptual framework of seed abscission and its contribution to long-distance dispersal; Wiley; Journal of Ecology; 101; 4; 3-2013; 889-904 0022-0477 |
url |
http://hdl.handle.net/11336/5378 |
identifier_str_mv |
Pazos, Gustavo Enrique; Greene, David F.; Katul, Gabriel; Bertiller, Monica Beatriz; Soons, Merel B.; Seed dispersal by wind: towards a conceptual framework of seed abscission and its contribution to long-distance dispersal; Wiley; Journal of Ecology; 101; 4; 3-2013; 889-904 0022-0477 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/wol1/doi/10.1111/1365-2745.12103/abstract info:eu-repo/semantics/altIdentifier/doi/10.1111/1365-2745.12103 info:eu-repo/semantics/altIdentifier/doi/ |
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.publisher.none.fl_str_mv |
Wiley |
publisher.none.fl_str_mv |
Wiley |
dc.source.none.fl_str_mv |
reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
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CONICET Digital (CONICET) |
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CONICET Digital (CONICET) |
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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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1844614120159051776 |
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13.070432 |