Seasonal and spatial characterization of the Gulf of California phytoplankton photosynthetic parameters

Holguín, José Eduardo Valdez; Borrego, Saúl Álvarez; Trees, Charles C.

doi:10.7773/cm.v25i4.732

Cited by 9 publications

(10 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Under LN conditions, Chl was significantly different than under "normal" conditions, but PP did not show significant differences relative to these latter conditions. This is probably because, under LN conditions, the physical dynamics of the gulf, with greater turbulence in the water column, likely favors the dominance of large cells, and Chl and PP values increase because the physiological conditioning and maximum photosynthetic capacity of phytoplankton are deterred, as reported by Álvarez-Borrego and Gaxiola-Castro (1988) and Valdez-Holguín et al (1999).…”

Section: Discussionmentioning

confidence: 92%

“…En el centro y la RIG, la abundancia de fitoplancton (predominantemente microfitoplancton) es generalmente mayor, del orden de millones de células por litro en la cuenca de Guaymas y >100,000 células por litro en la región norte (Gilbert y Allen 1943) durante condiciones de "invierno", y un mayor aporte de nutrientes asociado a los eventos LN no incrementa significativamente la actividad fotosintética. El efecto de LN en la PP es un tanto atenuado en primavera en la región central y RIG debido a la alta dinámica física; la mezcla vertical intensa por vientos y mareas transporta por turbulencia al fitoplancton a lo largo de la columna de agua, hacia arriba y abajo, y no permite el acondicionamiento del mismo a irradiancias altas, como lo sugirieron diversos autores para LN 1998(Valdez-Holguín et al 1999, Espinosa-Carreón y Valdez-Holguín 2007. Otro aspecto que posiblemente atenúa el efecto de LN en la PP es el pastoreo, que no permite que se incremente la tasa fotosintética por una disminución de la biomasa productiva (García-Pámanes y Lara-Lara 2001).…”

Section: Discussionunclassified

See 1 more Smart Citation

Temporal and spatial variation of sea surface temperature, chlorophyll a, and primary productivity in the Gulf of California

et al. 2013

View full text Add to dashboard Cite

ABSTRACT. Using satellite derived data from 1997-2010, sea surface temperature (SST), chlorophyll a (Chl) and primary productivity (PP) variations are described at different temporal and spatial scales in the Gulf of California. Interannual signals of El Niño (EN) and La Niña (LN) were more evident at the entrance to the gulf. Once EN or LN events were over, there was a delayed response of three to six months for the reestablishment of "normal" phytoplankton activity levels. Phytoplankton response to high concentrations of nutrients due to LN was not immediate. At regional scale, EN significantly decreased the Chl mean with regard to "normal" conditions at the entrance, central gulf, and Midriff Islands region (MIR); however, PP under EN conditions decreased significantly only at the entrance. The increase in Chl and PP due to LN relative to "normal" conditions was significant only at the entrance. SST, Chl, and PP annual signals are the main source of variation, particularly for the central gulf and entrance, but in the MIR, "winter" PP (1.96 g C m ). Highest PP was found in the central gulf and MIR, where inferences of production attributable to new production were estimated at more than 60% of PP. At the gulf entrance, primary productivity was mainly attributable to regenerated production, particularly during summer and autumn.Key words: Gulf of California, chlorophyll a, primary productivity, remote sensing, El Niño. RESUMEN.Con datos satelitales de 1997 a 2010, se describe la variación de temperatura superficial del mar (TSM), clorofila a (Chl) y productividad primaria (PP) a diferentes escalas temporales y espaciales en el golfo de California. Las señales interanuales El Niño (EN) y La Niña (LN) fueron más evidentes en la boca del golfo. Existió una respuesta desfasada de tres a seis meses para el restablecimiento de las condiciones "normales" de la actividad fitoplanctónica una vez que cesaba un evento EN o LN. La respuesta fitoplanctónica ante las mayores concentraciones de nutrientes que supone el evento LN no fue inmediata. En la escala regional, la condición EN redujo significativamente el promedio de Chl respecto a condiciones "normales" en la boca, el centro y la región de las islas grandes (RIG) del golfo; sin embargo, la PP bajo la condición EN sólo se redujo significativamente en la boca. El incremento de Chl y PP por LN con relación a condiciones "normales" sólo fue significativo en la boca. Se confirma que la señal anual de TSM, Chl y PP es la componente mayor de la variación, sobre todo para las regiones de la boca y centro. Sin embargo, en la RIG, la PP de "invierno" (1.96 g C m ). La PP más alta se encontró en la RIG y en el centro del golfo, en donde las inferencias de producción atribuible a la producción nueva se calcularon en más del 60% de PP. En la boca del golfo, la productividad primaria fue principalmente atribuible a la producción regenerada, particularmente durante verano y otoño.Palabras clave: golfo de California, clorofila a, productividad primaria, percepción remota, El Niño.

show abstract

Section: Discussionmentioning

confidence: 92%

Section: Discussionunclassified

Temporal and spatial variation of sea surface temperature, chlorophyll a, and primary productivity in the Gulf of California

et al. 2013

View full text Add to dashboard Cite

show abstract

“…A cluster analysis of surface temperature was used to define the cool season as the period end of November-end of June, and the rest of the year is considered the warm season. However, to be consistent with the previously defined 'winter' and 'summer' conditions, with November and June as transition periods, and recognizing interannual variability, we followed the criteria in Valdez-Holguín et al (1999) and considered mean surface temperatures of < 24°C as indicative of cool season. Surface temperatures < 24°C indicate either strong mixing or the start of upwelling events off the east coast.…”

Section: Methodsmentioning

confidence: 99%

Chlorophyll profiles and the water column structure in the Gulf of California

Hidalgo-González

Alvarez-Borrego

2001

Oceanologica Acta

View full text Add to dashboard Cite

Remote sensors provide information on the photosynthetic pigment concentration for the upper 22% of the euphotic zone. To model primary production in the water column from satellite-derived photosynthetic pigments, estimates of the vertical distribution of pigment concentration are required. A Gaussian distribution function is used to represent the pigment vertical profile with four parameters. We used 268 chlorophyll concentration profiles from 1973 through 1993, to estimate these parameters. Cluster analysis of surface temperature was used to define the cool season as the period end of November-end of June, and the rest of the year is considered the warm season. Cluster analysis of surface temperature and chlorophyll data grouped the stations into four regions for the cool season and into two regions for the warm season. Regression models were developed for each region and season to estimate the depth of the deep chlorophyll maximum as a function of the mixed layer depth or an index of stratification. We were not able to generate useful regression models to predict the other three Gaussian parameters. Thus, their representative means were calculated for each region and season. Assuming a homogeneous biomass profile resulted in underestimation of integrated primary production by as much as 60% with respect to the values derived from the non-homogeneous profiles.

show abstract

“…, y los de aguas caso II se generaron de acuerdo a Cervantes-Duarte et al (2000). Se utilizaron los valores de los parámetros fotosintéticos ( , y  max ) de Valdez-Holguín et al (1999). Se calculó la PF para cada hora de la mañana, y la suma se multiplicó por dos para obtener la PF de todo el día (se supuso simetría de PAR y constancia de Chl (z) en el día).…”

Section: Resultsunclassified

Nutrient input from the Colorado River to the northern Gulf of California is not required to maintain a productive pelagic ecosystem

et al. 2015

View full text Add to dashboard Cite

El golfo de California es uno de los ecosistemas marinos más productivos del planeta. Es un sistema eutrófico con una producción fitoplanctónica (PF) integrada de >1 g C m-2 día-1 y en algunos lugares >4 g C m-2 día-1 (Álvarez-Borrego y Nutrient input from the Colorado River to the northern Gulf of California is not required to maintain a productive pelagic ecosystem El aporte de nutrientes del río Colorado al norte del golfo de California no se requiere para mantener un ecosistema pelágico productivo

show abstract

Seasonal and spatial characterization of the Gulf of California phytoplankton photosynthetic parameters

Cited by 9 publications

References 24 publications

Temporal and spatial variation of sea surface temperature, chlorophyll a, and primary productivity in the Gulf of California

Temporal and spatial variation of sea surface temperature, chlorophyll a, and primary productivity in the Gulf of California

Chlorophyll profiles and the water column structure in the Gulf of California

Nutrient input from the Colorado River to the northern Gulf of California is not required to maintain a productive pelagic ecosystem

Contact Info

Product

Resources

About