Effect of turbidity on primary productivity at two stations in the area of the Colorado River Delta

Effect of turbidity on primary productivity at two stations in the area of the Colorado River Delta

Most coastal lagoons that present high tide intervals and high turbulent kinetic energy have high turbidity and, therefore, light is a limiting factor for primary productivity. The Colorado River Delta has been reported with high turbidity values. Our purpose is to estimate the effect of turbidity o...

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Autores principales: Santamaría-del-Ángel, E, Millán-Núñez, R, De-Peña-Nettel, G
Format: Online
Sprog:eng
Udgivet: Iniversidad Autónoma de Baja California 1996
Online adgang:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/869
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spelling oai:cienciasmarinas.com.mx:article-8692019-05-31T19:56:41Z Effect of turbidity on primary productivity at two stations in the area of the Colorado River Delta Efecto de la turbidez en la productividad primaria en dos estaciones en el área del Dental del Río Colorado Santamaría-del-Ángel, E Millán-Núñez, R De-Peña-Nettel, G primary productivity attenuation coefficient high turbidity coastal lagoons productividad primaria coeficiente de atenuación alta turbidez lagunas costeras Most coastal lagoons that present high tide intervals and high turbulent kinetic energy have high turbidity and, therefore, light is a limiting factor for primary productivity. The Colorado River Delta has been reported with high turbidity values. Our purpose is to estimate the effect of turbidity on primary productivity. We took water samples from two locations within the Colorado River Delta (one turbid and another less turbid). We carried out daily experiments on primary productivity with the 14C technique during spring and neap tides, from 15 to 22 May, I991. We used artificial light incubators with lamps of cool white constant light with 66.33 uE m–2 s–1 of irradiance and another with a stroboscopic lamp with white xenon light with 66.17 uE m–2 s–1 of irradiance. In general, in the samples from the high turbid location we found a higher concentration of chlorophyll a and a higher concentration of chlorophyll a per cell. In the incubations with the stroboscopic lamp, the samples from the turbid station showed higher assimilation rates and assimilation rates per cell than the samples from the clear station. Meanwhile, for the samples from the clear station, the assimilation rates and assimilation rates per cell were higher in the incubations with constant light. La mayoría de las lagunas costeras que presentan grandes intervalos de marea y alta energía cinética turbulenta tienen alta turbidez, por lo que la luz es un factor limitante para la productividad primaria. El delta del Río Colorado presenta altos valores de turbidez, por lo que se pretende estimar el efecto de ésta en la productividad primaria. Se recolectó agua de dos localidades dentro del delta del Río Colorado (una turbia y otra menos turbia). Se realizaron experimentos diarios de productividad mediante la técnica del 14C, durante mareas vivas y muertas, del 15 al 22 de mayo de 1991, Se usaron incubadores de luz artificial con lámparas de luz blanca fría constante a una irradiancia de 66.33 uE m–2 s–1 y con lámparas de luz blanca de xenón estroboscópica a una irradiancia de 66. I7 uE m–2 s–1. En general, se encontró que las muestras de la estación turbia presentaron mayor concentración de clorofila a y una mayor concentración de clorofila por célula. De igual manera, en las incubaciones con luz estroboscópica, se encontraron mayores razones de asimilación y razones de asimilación por célula en las muestras de la estación turbia que en las muestras de la estación menos turbia, mientras que para las muestras de la estación menos turbia, fueron más altas con luz continua. Iniversidad Autónoma de Baja California 1996-03-06 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado application/pdf https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/869 10.7773/cm.v22i4.869 Ciencias Marinas; Vol. 22 No. 4 (1996); 483-493 Ciencias Marinas; Vol. 22 Núm. 4 (1996); 483-493 2395-9053 0185-3880 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/869/791
institution Ciencias Marinas
collection OJS
language eng
format Online
author Santamaría-del-Ángel, E
Millán-Núñez, R
De-Peña-Nettel, G
spellingShingle Santamaría-del-Ángel, E
Millán-Núñez, R
De-Peña-Nettel, G
Effect of turbidity on primary productivity at two stations in the area of the Colorado River Delta
author_facet Santamaría-del-Ángel, E
Millán-Núñez, R
De-Peña-Nettel, G
author_sort Santamaría-del-Ángel, E
title Effect of turbidity on primary productivity at two stations in the area of the Colorado River Delta
title_short Effect of turbidity on primary productivity at two stations in the area of the Colorado River Delta
title_full Effect of turbidity on primary productivity at two stations in the area of the Colorado River Delta
title_fullStr Effect of turbidity on primary productivity at two stations in the area of the Colorado River Delta
title_full_unstemmed Effect of turbidity on primary productivity at two stations in the area of the Colorado River Delta
title_sort effect of turbidity on primary productivity at two stations in the area of the colorado river delta
description Most coastal lagoons that present high tide intervals and high turbulent kinetic energy have high turbidity and, therefore, light is a limiting factor for primary productivity. The Colorado River Delta has been reported with high turbidity values. Our purpose is to estimate the effect of turbidity on primary productivity. We took water samples from two locations within the Colorado River Delta (one turbid and another less turbid). We carried out daily experiments on primary productivity with the 14C technique during spring and neap tides, from 15 to 22 May, I991. We used artificial light incubators with lamps of cool white constant light with 66.33 uE m–2 s–1 of irradiance and another with a stroboscopic lamp with white xenon light with 66.17 uE m–2 s–1 of irradiance. In general, in the samples from the high turbid location we found a higher concentration of chlorophyll a and a higher concentration of chlorophyll a per cell. In the incubations with the stroboscopic lamp, the samples from the turbid station showed higher assimilation rates and assimilation rates per cell than the samples from the clear station. Meanwhile, for the samples from the clear station, the assimilation rates and assimilation rates per cell were higher in the incubations with constant light.
publisher Iniversidad Autónoma de Baja California
publishDate 1996
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/869
_version_ 1715724021900771328

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