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dc.creatorAbbas, Ahmed
dc.creatorRubio Casal, Alfredo Emilioes
dc.creatorCires Segura, Alfonso dees
dc.creatorFigueroa Clemente, Manuel Enriquees
dc.creatorNieva, Javieres
dc.creatorCastillo Segura, Jesús Manueles
dc.identifier.citationAbbas, A.M., Rubio Casal, A.E., Cires Segura, A.d., Figueroa Clemente, M.E., Nieva, J. y Castillo Segura, J.M. (2014). Wrack burial reduces germination and establishment of the invasive cordgrass Spartina densiflora. NeoBiota, 21, 65-79.
dc.description.abstractGermination 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
dc.relation.ispartofNeoBiota, 21, 65-79.
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internacional*
dc.subjectCoastal marsheses
dc.subjectphysiological dormancyes
dc.subjectplant debrises
dc.subjectSpartina densifloraes
dc.titleWrack burial reduces germination and establishment of the invasive cordgrass Spartina densifloraes
dc.contributor.affiliationUniversidad de Sevilla. Departamento de Biología Vegetal y Ecologíaes

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Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Except where otherwise noted, this item's license is described as: Attribution-NonCommercial-NoDerivatives 4.0 Internacional