Dinámica de la vegetación y del banco de semillas en un humedal herbáceo lacustrino (Venezuela)
Vegetation and seed banks association with seasonal water depth variations were studied in a herbaceous wetland of a tropical lake in Monagas, Venezuela. The sampling was done in 1 Ox 1 0 m2 quadrates located at random in two zones of the lagoon. In each sampling four quadrates per zone were analyze...
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| Formato: | Online |
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Universidad de Costa Rica
2000
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| Acceso en línea: | https://revistas.ucr.ac.cr/index.php/rbt/article/view/18132 |
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RBT181322022-06-13T19:47:42Z Dinámica de la vegetación y del banco de semillas en un humedal herbáceo lacustrino (Venezuela) Dinámica de la vegetación y del banco de semillas en un humedal herbáceo lacustrino (Venezuela) Gordon, Elizabeth vegetation seed bank wetlands lagoons tropical venezuela Vegetation and seed banks association with seasonal water depth variations were studied in a herbaceous wetland of a tropical lake in Monagas, Venezuela. The sampling was done in 1 Ox 1 0 m2 quadrates located at random in two zones of the lagoon. In each sampling four quadrates per zone were analyzed for relative species density, species richness, life forms and water depth. Soil samples were taken simultaneously for size and composition of the seed banks (seedling emergence method). Soil pH was five. The organic total fraetion of the soil varied between 38% and 52%, and the conductivity between 1 14 and 1 82 flmhos!cm. 50 species were recorded: 46% perennial herbs, 22% vines, 1 2% suffrutescents and 10% hydrophytes. The highest species richness was recorded during periods of fain and rain-dry transition. Hymenachne amplexicaulis, Leersia hexandra, Sacciolepis striata and Polygonum acuminatum were among the most important species numerically. The total density of seed bank varied between 5689 and 1 3936 seedlings/m2. In the seed bank there were 58 species: 43% perennial herbs, 22% suffrutescents, 12% vines 9% annual herbs and 9%, hydrophytes. The highest species richness in the seed bank was during periods of dry and dry-rain transition. Cyperus odora/us. Eleocharis interstincta, Ludwigia hyssopifolía, L. lithospermifolia and Po/ygonum acuminatum had the highest densities. The potential flora of these wetlands included 76 species, but only 33 (43%) were common lo the seed bank and Ihe vegetation. Vegetation and seed banks association with seasonal water depth variations were studied in a herbaceous wetland of a tropical lake in Monagas, Venezuela. The sampling was done in 1 Ox 1 0 m2 quadrates located at random in two zones of the lagoon. In each sampling four quadrates per zone were analyzed for relative species density, species richness, life forms and water depth. Soil samples were taken simultaneously for size and composition of the seed banks (seedling emergence method). Soil pH was five. The organic total fraetion of the soil varied between 38% and 52%, and the conductivity between 1 14 and 1 82 flmhos!cm. 50 species were recorded: 46% perennial herbs, 22% vines, 1 2% suffrutescents and 10% hydrophytes. The highest species richness was recorded during periods of fain and rain-dry transition. Hymenachne amplexicaulis, Leersia hexandra, Sacciolepis striata and Polygonum acuminatum were among the most important species numerically. The total density of seed bank varied between 5689 and 1 3936 seedlings/m2. In the seed bank there were 58 species: 43% perennial herbs, 22% suffrutescents, 12% vines 9% annual herbs and 9%, hydrophytes. The highest species richness in the seed bank was during periods of dry and dry-rain transition. Cyperus odora/us. Eleocharis interstincta, Ludwigia hyssopifolía, L. lithospermifolia and Po/ygonum acuminatum had the highest densities. The potential flora of these wetlands included 76 species, but only 33 (43%) were common lo the seed bank and Ihe vegetation. Universidad de Costa Rica 2000-03-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Article application/pdf https://revistas.ucr.ac.cr/index.php/rbt/article/view/18132 10.15517/rbt.v48i1.18132 Revista de Biología Tropical; Vol. 48 No. 1 (2000): Volume 48 – Regular number 1 – March 2000; 25–42 Revista de Biología Tropical; Vol. 48 Núm. 1 (2000): Volumen 48 – Número regular 1 – Marzo 2000; 25–42 Revista Biología Tropical; Vol. 48 N.º 1 (2000): Volume 48 – Regular number 1 – March 2000; 25–42 2215-2075 0034-7744 10.15517/rbt.v48i1 spa https://revistas.ucr.ac.cr/index.php/rbt/article/view/18132/18326 Copyright (c) 2000 Revista de Biología Tropical http://creativecommons.org/licenses/by/4.0 |
| institution |
Universidad de Costa Rica |
| collection |
Revista de Biología Tropical |
| language |
spa |
| format |
Online |
| author |
Gordon, Elizabeth |
| spellingShingle |
Gordon, Elizabeth Dinámica de la vegetación y del banco de semillas en un humedal herbáceo lacustrino (Venezuela) |
| author_facet |
Gordon, Elizabeth |
| author_sort |
Gordon, Elizabeth |
| description |
Vegetation and seed banks association with seasonal water depth variations were studied in a herbaceous wetland of a tropical lake in Monagas, Venezuela. The sampling was done in 1 Ox 1 0 m2 quadrates located at random in two zones of the lagoon. In each sampling four quadrates per zone were analyzed for relative species density, species richness, life forms and water depth. Soil samples were taken simultaneously for size and composition of the seed banks (seedling emergence method). Soil pH was five. The organic total fraetion of the soil varied between 38% and 52%, and the conductivity between 1 14 and 1 82 flmhos!cm. 50 species were recorded: 46% perennial herbs, 22% vines, 1 2% suffrutescents and 10% hydrophytes. The highest species richness was recorded during periods of fain and rain-dry transition. Hymenachne amplexicaulis, Leersia hexandra, Sacciolepis striata and Polygonum acuminatum were among the most important species numerically. The total density of seed bank varied between 5689 and 1 3936 seedlings/m2. In the seed bank there were 58 species: 43% perennial herbs, 22% suffrutescents, 12% vines 9% annual herbs and 9%, hydrophytes. The highest species richness in the seed bank was during periods of dry and dry-rain transition. Cyperus odora/us. Eleocharis interstincta, Ludwigia hyssopifolía, L. lithospermifolia and Po/ygonum acuminatum had the highest densities. The potential flora of these wetlands included 76 species, but only 33 (43%) were common lo the seed bank and Ihe vegetation. |
| title |
Dinámica de la vegetación y del banco de semillas en un humedal herbáceo lacustrino (Venezuela) |
| title_short |
Dinámica de la vegetación y del banco de semillas en un humedal herbáceo lacustrino (Venezuela) |
| title_full |
Dinámica de la vegetación y del banco de semillas en un humedal herbáceo lacustrino (Venezuela) |
| title_fullStr |
Dinámica de la vegetación y del banco de semillas en un humedal herbáceo lacustrino (Venezuela) |
| title_full_unstemmed |
Dinámica de la vegetación y del banco de semillas en un humedal herbáceo lacustrino (Venezuela) |
| title_sort |
dinámica de la vegetación y del banco de semillas en un humedal herbáceo lacustrino (venezuela) |
| title_alt |
Dinámica de la vegetación y del banco de semillas en un humedal herbáceo lacustrino (Venezuela) |
| publisher |
Universidad de Costa Rica |
| publishDate |
2000 |
| url |
https://revistas.ucr.ac.cr/index.php/rbt/article/view/18132 |
| work_keys_str_mv |
AT gordonelizabeth dinamicadelavegetacionydelbancodesemillasenunhumedalherbaceolacustrinovenezuela |
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1810114749712564224 |