Wrack burial reduces germination and establishment of the invasive cordgrass Spartina densiflora

Germination and emergence of halophytes may decrease significantly by seed burial in dead plant material, or wrack, which is common and abundant in tidal marshes. The effects of plant debris (wrack) burial on seed germination and seedling establishment of Spartina densiflora, an invasive cordgrass,...

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Autores: Abbas, Ahmed M., Rubio Casal, Alfredo Emilio, Cires Segura, Alfonso de, Figueroa Clemente, Manuel Enrique, Nieva, Javier, Castillo Segura, Jesús Manuel
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2014
País:España
Institución:Universidad de Sevilla (US)
Repositorio:idUS. Depósito de Investigación de la Universidad de Sevilla
OAI Identifier:oai:idus.us.es:11441/44274
Acceso en línea:http://hdl.handle.net/11441/44274
https://doi.org/10.3897/neobiota.21.4963
Access Level:acceso abierto
Palabra clave:Coastal marshes
physiological dormancy
plant debris
seedling
Spartina densiflora
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spelling Wrack burial reduces germination and establishment of the invasive cordgrass Spartina densifloraAbbas, Ahmed M.Rubio Casal, Alfredo EmilioCires Segura, Alfonso deFigueroa Clemente, Manuel EnriqueNieva, JavierCastillo Segura, Jesús ManuelCoastal marshesphysiological dormancyplant debrisseedlingSpartina densifloraGermination and emergence of halophytes may decrease significantly by seed burial in dead plant material, or wrack, which is common and abundant in tidal marshes. The effects of plant debris (wrack) burial on seed germination and seedling establishment of Spartina densiflora, an invasive cordgrass, were studied under greenhouse conditions and compared with field observations. Five wrack burial depths were applied: control without wrack, 1 cm (1235 ± 92 g DW wrack m-2), 2 cm (3266 ± 13 g DW m-2), 4 cm (4213 ± 277 g DW m-2), and 8 cm (6138 ± 227 g DW m-2). Sediment pH, electrical conductivity, redox potential and temperature were recorded. Quiescence increased with wrack load up to ~20% at 8 cm deep. Germination decreased with wrack load from 96% to 14%, which could be related with anoxic conditions under the debris since sediment redox potential was as low as -83 ± 7 mV at 8 cm. Germination percentage increased and quiescent and dormant percentages decreased at higher daily sediment temperatures and with higher daily temperature fluctuations, conditions that were recorded without or under low loads of wrack. Spartina densiflora did not show primary dormancy, but its seeds entered into a non-deep physiological dormancy below 1 cm deep in plant debris. The establishment of S. densiflora seedlings was also greatly reduced by wrack burial since only 6 seedlings (11 ± 5 % of germinated seeds) emerged above plant debris from 1 cm and all seedlings died from deeper than 1 cm. S. densiflora seedling development was also reduced by wrack burial. The inverse relationship between germination and emergence of S. densiflora with wrack burial recorded in our study is useful to predict its invasion dynamics and to plan the management of invaded marshes.Biología Vegetal y Ecología2014info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/pdfhttp://hdl.handle.net/11441/44274https://doi.org/10.3897/neobiota.21.4963reponame:idUS. Depósito de Investigación de la Universidad de Sevillainstname:Universidad de Sevilla (US)InglésNeoBiota, 21, 65-79.http://neobiota.pensoft.net/articles.php?id=1268info:eu-repo/semantics/openAccessoai:idus.us.es:11441/442742026-06-17T12:51:07Z
dc.title.none.fl_str_mv Wrack burial reduces germination and establishment of the invasive cordgrass Spartina densiflora
title Wrack burial reduces germination and establishment of the invasive cordgrass Spartina densiflora
spellingShingle Wrack burial reduces germination and establishment of the invasive cordgrass Spartina densiflora
Abbas, Ahmed M.
Coastal marshes
physiological dormancy
plant debris
seedling
Spartina densiflora
title_short Wrack burial reduces germination and establishment of the invasive cordgrass Spartina densiflora
title_full Wrack burial reduces germination and establishment of the invasive cordgrass Spartina densiflora
title_fullStr Wrack burial reduces germination and establishment of the invasive cordgrass Spartina densiflora
title_full_unstemmed Wrack burial reduces germination and establishment of the invasive cordgrass Spartina densiflora
title_sort Wrack burial reduces germination and establishment of the invasive cordgrass Spartina densiflora
dc.creator.none.fl_str_mv Abbas, Ahmed M.
Rubio Casal, Alfredo Emilio
Cires Segura, Alfonso de
Figueroa Clemente, Manuel Enrique
Nieva, Javier
Castillo Segura, Jesús Manuel
author Abbas, Ahmed M.
author_facet Abbas, Ahmed M.
Rubio Casal, Alfredo Emilio
Cires Segura, Alfonso de
Figueroa Clemente, Manuel Enrique
Nieva, Javier
Castillo Segura, Jesús Manuel
author_role author
author2 Rubio Casal, Alfredo Emilio
Cires Segura, Alfonso de
Figueroa Clemente, Manuel Enrique
Nieva, Javier
Castillo Segura, Jesús Manuel
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Biología Vegetal y Ecología
dc.subject.none.fl_str_mv Coastal marshes
physiological dormancy
plant debris
seedling
Spartina densiflora
topic Coastal marshes
physiological dormancy
plant debris
seedling
Spartina densiflora
description Germination and emergence of halophytes may decrease significantly by seed burial in dead plant material, or wrack, which is common and abundant in tidal marshes. The effects of plant debris (wrack) burial on seed germination and seedling establishment of Spartina densiflora, an invasive cordgrass, were studied under greenhouse conditions and compared with field observations. Five wrack burial depths were applied: control without wrack, 1 cm (1235 ± 92 g DW wrack m-2), 2 cm (3266 ± 13 g DW m-2), 4 cm (4213 ± 277 g DW m-2), and 8 cm (6138 ± 227 g DW m-2). Sediment pH, electrical conductivity, redox potential and temperature were recorded. Quiescence increased with wrack load up to ~20% at 8 cm deep. Germination decreased with wrack load from 96% to 14%, which could be related with anoxic conditions under the debris since sediment redox potential was as low as -83 ± 7 mV at 8 cm. Germination percentage increased and quiescent and dormant percentages decreased at higher daily sediment temperatures and with higher daily temperature fluctuations, conditions that were recorded without or under low loads of wrack. Spartina densiflora did not show primary dormancy, but its seeds entered into a non-deep physiological dormancy below 1 cm deep in plant debris. The establishment of S. densiflora seedlings was also greatly reduced by wrack burial since only 6 seedlings (11 ± 5 % of germinated seeds) emerged above plant debris from 1 cm and all seedlings died from deeper than 1 cm. S. densiflora seedling development was also reduced by wrack burial. The inverse relationship between germination and emergence of S. densiflora with wrack burial recorded in our study is useful to predict its invasion dynamics and to plan the management of invaded marshes.
publishDate 2014
dc.date.none.fl_str_mv 2014
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11441/44274
https://doi.org/10.3897/neobiota.21.4963
url http://hdl.handle.net/11441/44274
https://doi.org/10.3897/neobiota.21.4963
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv NeoBiota, 21, 65-79.
http://neobiota.pensoft.net/articles.php?id=1268
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.source.none.fl_str_mv reponame:idUS. Depósito de Investigación de la Universidad de Sevilla
instname:Universidad de Sevilla (US)
instname_str Universidad de Sevilla (US)
reponame_str idUS. Depósito de Investigación de la Universidad de Sevilla
collection idUS. Depósito de Investigación de la Universidad de Sevilla
repository.name.fl_str_mv
repository.mail.fl_str_mv
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