Growth of three subtropical mangrove species in response to varying hydroperiod in an experimental tank
The effect of hydroperiod on the survival and growth of Avicennia germinans , Laguncularia racemosa , and Rhizophora mangle seedlings under experimental c onditions was investigated using a simulated tidal system. Seedl ings of the three mangrove speci es were grown at four inundation levels. All le...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2014 |
| País: | México |
| Institución: | Universidad Nacional Autónoma de México |
| Repositorio: | Redalyc-UNAM |
| OAI Identifier: | oai:redalyc.org:48032997005 |
| Acceso en línea: | https://www.redalyc.org/articulo.oa?id=48032997005 |
| Access Level: | acceso abierto |
| Palabra clave: | Ciencias de la Tierra hydroperiod Rhizophora mangle Avicennia germinans Laguncularia racemosa |
| Sumario: | The effect of hydroperiod on the survival and growth of Avicennia germinans , Laguncularia racemosa , and Rhizophora mangle seedlings under experimental c onditions was investigated using a simulated tidal system. Seedl ings of the three mangrove speci es were grown at four inundation levels. All levels were flooded every 12 h i n order to create a simulated semi-diurnal tide cycle (i.e., tw o high tides and two low tides per day). Based on the hydroperiod for the study a rea, level 1 was flooded for 10 h, level 2 for 6 h, level 3 for 2 h, and level 4 for 6 min. After 570 days, the results showed that R . mangle presented the highest growth at level 1 and the lowest growth at level 4. The optimal growth of L. racemosa occurred at levels 2 and 3, but all the seedlings died at leve l 1, indicating that this species is highly sensitive to tidal regimes. Compared to L. racemosa and R. mangle , A. germinans had a moderate growth rate at all four levels. Mangrove growth differentiations were more prominent at levels 1 and 3, where t he three species showed very dif ferent growth patterns. Studies of optimal growth using hydroperiod experiments are important in order to understand the physiological respons es of mangrove forests to a possible sea level rise in the next decades, especially i n subtropical envir onments where they are cons tantly exposed to stress. |
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