Campos de luz y tasas de fotosíntesis/respiración en pastos marinos de aguas costeras turbias (c9)
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Fecha
2013-07-02
Autores
Ayeni Hamer, Esan
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Editor
Universidad Central "Marta Abreu" de Las Villas
Resumen
Utilizando el espectro de la Luz Fotosintéticamente Utilizable (PUR) (400nm-700nm) un estudio de los campos de luz sobre angiospermas marinas fue realizado. El comportamiento de la radiación fue analizado, cómo penetra la columna de agua y también la radiación ascendente del fondo debido a la reflexión. En este proyecto se analiza el agua del tipo óptico C9 la cual tiene características de muy alta turbidez y muy común como aguas costeras en Sud América. El análisis de la irradiancia espectral en profundidades diferentes y longitudes de ondas diferentes se realizá aplicando un modelo generalizado de la ley de Lambert-Beer con la introducción de una variable clásica que toma en cuenta la sombra canopial. La tasa de fotosíntesis para la Thalassia testudinum fue también determinada en el estudio. La radiación fotosintéticamente utilizable (PUR) y los ritmos diarios de respiración fueron calculados y los resultados demuestran significativamente una regresión lineal en todos los tres factores mencionados lo cual indica que debido a la atenuación, tanto por la columna de agua como por la canopia, la mayor parte de la actividad ecológica sería dominate en las capas superiores de la canopia.
Using the spectrum of Photosynthetic Usable Radiation (400-700nm) a study on light fields was conducted on marine angiosperms, the study analyzed behavioral patterns of radiation as it penetrated the water column as well as ascending radiation from the bottom due to reflection. In this study an extensive analysis was carried on water of optical type (C9) which is known as turbid costal water, mainly found on the coast of South America. Part of the study included an analysis of the spectral irradiance at different depths and wavelengths applying a model generalized to the Lambert-Beer law with the introduction of a classical variable which considers the shade provide by the canopy, also the determination of photosynthetic rates for Thalassia testudinum. The Photosynthetic Usable Radiation, and the daily respiratory rates were calculated and the results interestingly demonstrates a linear regression in all three factors mentioned which indicates that due to attenuation by both the water column and the canopy most of the ecological activity would be dominant in the upper layers of the canopy.
Using the spectrum of Photosynthetic Usable Radiation (400-700nm) a study on light fields was conducted on marine angiosperms, the study analyzed behavioral patterns of radiation as it penetrated the water column as well as ascending radiation from the bottom due to reflection. In this study an extensive analysis was carried on water of optical type (C9) which is known as turbid costal water, mainly found on the coast of South America. Part of the study included an analysis of the spectral irradiance at different depths and wavelengths applying a model generalized to the Lambert-Beer law with the introduction of a classical variable which considers the shade provide by the canopy, also the determination of photosynthetic rates for Thalassia testudinum. The Photosynthetic Usable Radiation, and the daily respiratory rates were calculated and the results interestingly demonstrates a linear regression in all three factors mentioned which indicates that due to attenuation by both the water column and the canopy most of the ecological activity would be dominant in the upper layers of the canopy.
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Palabras clave
Sea Grass, Photosynthetic Usable Radiation, Photosynthesis Rates, Radiación Útil Fotosintética, Angiospermos Marinos, Luz Fotosintéticamente Utilizable (PUR)