Timing of seed dispersal generates a bimodal seed bank depth distribution
5 páginas, 3 tablas, 2 gráficos.
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| Format: | artículo biblioteca |
| Language: | English |
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Botanical Society of America
2005-10
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| Subjects: | Doñana, Helophytes, Juncus, Mediterranean wetland, Scirpus, Seed buoyancy, Seed rain, Soil cracks, |
| Online Access: | http://hdl.handle.net/10261/35075 http://dx.doi.org/10.13039/501100011011 |
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dig-irnas-es-10261-350752018-09-11T09:25:29Z Timing of seed dispersal generates a bimodal seed bank depth distribution Espinar, José L. Thompson, Ken García, Luis V. Junta de Andalucía Ministerio de Medio Ambiente (España) Doñana Helophytes Juncus Mediterranean wetland Scirpus Seed buoyancy Seed rain Soil cracks 5 páginas, 3 tablas, 2 gráficos. The density of soil seed banks is normally highest at the soil surface and declines monotonically with depth. Sometimes, for a variety of reasons, peak density occurs below the surface but, except in severely disturbed soils, it is generally true that deeper seeds are older. In seasonally dry habitats that develop deep soil cracks during the dry season, it is possible that some seeds fall down cracks and rapidly become deeply buried. We investigated this possibility for three dominant clonal perennials (Scirpus maritimus, S. litoralis, and Juncus subulatus) in the Doñana salt marsh, a nontidal marsh with a Mediterranean climate located in southwest Spain. Two species, which shed most of their seed during the dry season and have seeds with low buoyancy, had bimodal viable seed depth distributions, with peak densities at the surface and at 16–20 cm. A third species, which shed most seeds after soil cracks had closed and had seeds with high buoyancy, had viable seeds only in surface soil. Bimodal seed bank depth distributions may be relatively common in seasonally dry habitats with fine-textured soils, but their ecological significance has not been investigated. The Spanish Ministry of the Environment (MMA, project 05/99) and the Junta de Andalucía (research group 4086) provided financial support. Peer reviewed 2011-04-28T10:09:24Z 2011-04-28T10:09:24Z 2005-10 artículo http://purl.org/coar/resource_type/c_6501 American Journal of Botany 92(10): 1759–1763 (2005) 0002-9122 http://hdl.handle.net/10261/35075 http://dx.doi.org/10.13039/501100011011 en http://www.amjbot.org/cgi/reprint open Botanical Society of America |
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España |
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ES |
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Bibliográfico |
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biblioteca |
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Europa del Sur |
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Biblioteca del IRNAS España |
| language |
English |
| topic |
Doñana Helophytes Juncus Mediterranean wetland Scirpus Seed buoyancy Seed rain Soil cracks Doñana Helophytes Juncus Mediterranean wetland Scirpus Seed buoyancy Seed rain Soil cracks |
| spellingShingle |
Doñana Helophytes Juncus Mediterranean wetland Scirpus Seed buoyancy Seed rain Soil cracks Doñana Helophytes Juncus Mediterranean wetland Scirpus Seed buoyancy Seed rain Soil cracks Espinar, José L. Thompson, Ken García, Luis V. Timing of seed dispersal generates a bimodal seed bank depth distribution |
| description |
5 páginas, 3 tablas, 2 gráficos. |
| author2 |
Junta de Andalucía |
| author_facet |
Junta de Andalucía Espinar, José L. Thompson, Ken García, Luis V. |
| format |
artículo |
| topic_facet |
Doñana Helophytes Juncus Mediterranean wetland Scirpus Seed buoyancy Seed rain Soil cracks |
| author |
Espinar, José L. Thompson, Ken García, Luis V. |
| author_sort |
Espinar, José L. |
| title |
Timing of seed dispersal generates a bimodal seed bank depth distribution |
| title_short |
Timing of seed dispersal generates a bimodal seed bank depth distribution |
| title_full |
Timing of seed dispersal generates a bimodal seed bank depth distribution |
| title_fullStr |
Timing of seed dispersal generates a bimodal seed bank depth distribution |
| title_full_unstemmed |
Timing of seed dispersal generates a bimodal seed bank depth distribution |
| title_sort |
timing of seed dispersal generates a bimodal seed bank depth distribution |
| publisher |
Botanical Society of America |
| publishDate |
2005-10 |
| url |
http://hdl.handle.net/10261/35075 http://dx.doi.org/10.13039/501100011011 |
| work_keys_str_mv |
AT espinarjosel timingofseeddispersalgeneratesabimodalseedbankdepthdistribution AT thompsonken timingofseeddispersalgeneratesabimodalseedbankdepthdistribution AT garcialuisv timingofseeddispersalgeneratesabimodalseedbankdepthdistribution |
| _version_ |
1777664178062884864 |