Effects of the interannual variability of water column stratification on phytoplankton production and biomass in the northern zone off Baja California

The ocean off the Baja California Peninsula (Mexico) has been affected by interannual processes. Some of these processes have produced changes in oceanic circulation and the atmosphere, which have been reflected in the structure of the water column. Stratification, defined as the amount of energy ne...

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Autores principales: Gómez-Ocampo, Eliana, Durazo, Reginaldo, Gaxiola-Castro, Gilberto, De la Cruz-Orozco, Martin, Sosa-Ávalos, Ramón
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Lenguaje:eng
Publicado: Iniversidad Autónoma de Baja California 2017
Acceso en línea:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/2759
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language eng
description The ocean off the Baja California Peninsula (Mexico) has been affected by interannual processes. Some of these processes have produced changes in oceanic circulation and the atmosphere, which have been reflected in the structure of the water column. Stratification, defined as the amount of energy needed to mix water throughout the water column, determines nutrient availability in the euphotic zone for phytoplankton growth. The aim of this study is to describe and relate the interannual variations of phytoplankton production and biomass with changes in the structure of the water column. To this end, we analyzed time series (1997–2016) for integrated Chlorophyll a, integrated primary production, pycnocline depth, mixed layer depth, and stratification indices along line 100 of the Investigaciones Mexicanas de la Corriente de California (IMECOCAL) program. The results showed 2 periods of high stratification and a decrease in phytoplankton production and biomass off Baja California, corresponding to the intrusion of subarctic water and El Niño 2015–2016. Finally, by using generalized additive models, we related 2 photosynthethic parameters-maximum photosynthetic rate and maximum light utilization coefficient-with water stratification. These relationships explained interannual variations in phytoplankton production in terms of water column stratification. The time series and the analysis reported here for IMECOCAL line 100 could be used to extrapolate the effects of interannual physical processes on phytoplankton in other zones off the Baja California peninsula.
format info:eu-repo/semantics/article
author Gómez-Ocampo, Eliana
Durazo, Reginaldo
Gaxiola-Castro, Gilberto
De la Cruz-Orozco, Martin
Sosa-Ávalos, Ramón
spellingShingle Gómez-Ocampo, Eliana
Durazo, Reginaldo
Gaxiola-Castro, Gilberto
De la Cruz-Orozco, Martin
Sosa-Ávalos, Ramón
Effects of the interannual variability of water column stratification on phytoplankton production and biomass in the northern zone off Baja California
author_facet Gómez-Ocampo, Eliana
Durazo, Reginaldo
Gaxiola-Castro, Gilberto
De la Cruz-Orozco, Martin
Sosa-Ávalos, Ramón
author_sort Gómez-Ocampo, Eliana
title Effects of the interannual variability of water column stratification on phytoplankton production and biomass in the northern zone off Baja California
title_short Effects of the interannual variability of water column stratification on phytoplankton production and biomass in the northern zone off Baja California
title_full Effects of the interannual variability of water column stratification on phytoplankton production and biomass in the northern zone off Baja California
title_fullStr Effects of the interannual variability of water column stratification on phytoplankton production and biomass in the northern zone off Baja California
title_full_unstemmed Effects of the interannual variability of water column stratification on phytoplankton production and biomass in the northern zone off Baja California
title_sort effects of the interannual variability of water column stratification on phytoplankton production and biomass in the northern zone off baja california
publisher Iniversidad Autónoma de Baja California
publishDate 2017
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/2759
_version_ 1792610340373004288
spelling repositorioinstitucional-20.500.12930-75282023-05-09T14:30:57Z Effects of the interannual variability of water column stratification on phytoplankton production and biomass in the northern zone off Baja California Efectos de la variabilidad interanual de la estratificación de la columna deagua sobre la producción y biomasa del fitoplancton en la zona norte frente a Baja California Gómez-Ocampo, Eliana Durazo, Reginaldo Gaxiola-Castro, Gilberto De la Cruz-Orozco, Martin Sosa-Ávalos, Ramón The ocean off the Baja California Peninsula (Mexico) has been affected by interannual processes. Some of these processes have produced changes in oceanic circulation and the atmosphere, which have been reflected in the structure of the water column. Stratification, defined as the amount of energy needed to mix water throughout the water column, determines nutrient availability in the euphotic zone for phytoplankton growth. The aim of this study is to describe and relate the interannual variations of phytoplankton production and biomass with changes in the structure of the water column. To this end, we analyzed time series (1997–2016) for integrated Chlorophyll a, integrated primary production, pycnocline depth, mixed layer depth, and stratification indices along line 100 of the Investigaciones Mexicanas de la Corriente de California (IMECOCAL) program. The results showed 2 periods of high stratification and a decrease in phytoplankton production and biomass off Baja California, corresponding to the intrusion of subarctic water and El Niño 2015–2016. Finally, by using generalized additive models, we related 2 photosynthethic parameters-maximum photosynthetic rate and maximum light utilization coefficient-with water stratification. These relationships explained interannual variations in phytoplankton production in terms of water column stratification. The time series and the analysis reported here for IMECOCAL line 100 could be used to extrapolate the effects of interannual physical processes on phytoplankton in other zones off the Baja California peninsula. El océano frente a las costas de la península de Baja California ha sido afectado por diferentes procesos interanuales. Algunos de estos procesos han generado cambios en la circulación oceánica y en la atmósfera que se han reflejado en la estratificación de la columna de agua. La estratificación, definida como la cantidad de energía necesaria para mezclar una columna de agua, determina la disponibilidad de nutrientes necesarios para el crecimiento del fitoplancton. El objetivo de este artículo es describir y relacionar las variaciones interanuales de la biomasa y producción del fitoplancton con la estructura de la columna de agua. Para esto, se analizaron las series de tiempo (1997–2016) de clorofila a y producción primaria integradas, profundidad de la picnoclina y de la capa de mezcla y los índices de estratificación entre la superficie y los 100 y 200 m en la Línea 100 del programa Investigaciones Mexicanas de la Corriente de California (IMECOCAL). Los resultados mostraron que los periodos de mayor estratificación en la columna de agua fueron durante la intrusión de agua subártica 2002–2007 y El Niño 2015–2016, los cuales trajeron como consecuencia el mayor declive en la biomasa del fitoplancton (en ambos periodos) y de producción primaria (durante El Niño 2015–2016) en la zona norte frente a Baja California. Finalmente, se relacionaron la tasa fotosintética máxima y el coeficiente de utilización máxima de la luz, con el índice de estratificación por medio de modelos aditivos generalizados. Estas relaciones explicaron las variaciones interanuales en la producción primaria en correspondencia con la estratificación de la columna de agua. Las series de tiempo y el análisis presentado aquí para la línea 100 del IMECOCAL podrán ser extrapoladas a otras zonas frente a la península para entender la relación entre los procesos físicos con la biomasa y producción primaria del fitoplancton. Palabras clave: fitoplancton, estratificación, producción primaria, Baja California, MECOCAL. 2017-06-30 2021-06-03T03:55:34Z 2021-06-03T03:55:34Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/2759 10.7773/cm.v43i2.2759 https://hdl.handle.net/20.500.12930/7528 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/2759/1651 Copyright (c) 2017 Ciencias Marinas application/pdf Iniversidad Autónoma de Baja California Ciencias Marinas; Vol. 43 No. 2 (2017); 109-122 Ciencias Marinas; Vol. 43 Núm. 2 (2017); 109-122 2395-9053 0185-3880