Seasonal dynamics of inorganic nutrients and phytoplankton biomass in the NW Alboran Sea

Ramı́rez, Teodoro; Cortés, Dolores; Mercado, Jesús M.; Vargas‐Yáñez, Manuel; Sebastián, Marta; Liger, E.

doi:10.1016/j.ecss.2005.07.012

Cited by 93 publications

(68 citation statements)

References 53 publications

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“…Also, contents are higher in summer when irradiance is the highest, as observed in several brown macroalgae from Brittany (Connan et al 2004) and in C. tamariscifolia collected in Southern Spain (Abdala-Díaz et al 2006). In contrast, in our study C. tamariscifolia showed higher phenolic content in winter than in summer, probably in relation to the high winter nitrate availability in Málaga (Ramírez et al 2005). N can enhance the accumulation of phenolic compounds in some brown algae Toth 2000, Celis-Plá et al 2014) as well as in Ulva rigida (Cabello-Pasini et al 2011).…”

Section: Discussioncontrasting

confidence: 54%

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Seasonal photoacclimation patterns in the intertidal macroalga <em>Cystoseira tamariscifolia</em> (Ochrophyta)

et al. 2014

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Summary: Cystoseira tamariscifolia thalli collected from rocky shores and rockpools in winter and summer in Southern Spain were incubated for 7 days in UV transparent cylindrical vessels under outdoor conditions. Photosynthetic activity estimated as in vivo chlorophyll a fluorescence of photosystem II, photosynthetic pigments, antioxidant activity (DPPH assay), phenolic compounds and total internal C and N contents were determined after short-term (3 d) and mid-term (7 d) periods. Maximum quantum yield of PSII (F v /F m ) was significantly higher in field-collected algae and after 7 d incubation in winter than in summer. In rocky shores and rockpools thalli, maximum electron transport rate (ETR max ) and photosynthetic efficiency (a ETR ) were much higher in summer than in winter. ETR of outdoor-grown thalli (in situ ETR) showed a daily pattern, with a decrease at noon in both winter and summer (3 rd and 7 th days). We found much higher antioxidant activity in thalli collected in summer than in winter. However, the concentration of internal UV screen substances (polyphenols) was higher in winter than in summer, whereas the release of phenolic compounds was lower. The highest capacity of acclimation in C. tamariscifolia found in summer and RS with emersion periods was explained by the highest dynamic photoinhibition, energy dissipation (non-photochemical quenching) and antioxidant activity (EC 50 ).Keywords: antioxidant activity; Cystoseira tamariscifolia; phenolic compounds; photoinhibition; photoprotection. Patrones estacionales de fotoaclimatación en el alga intermareal, Cystoseira tamariscifolia (Ochrophyta)Resumen: Talos de Cystoseira tamariscifolia recolectados en pozas y plataformas rocosas intermareales (Sur de España) en invierno y en verano se incubaron bajo radiación solar durante 7 días en recipientes cilíndricos de metacrilato transparentes a la radiación UV. Se estimó la actividad fotosintética a través de la fluorescencia de la clorofila a asociada al fotosistema II, el contenido de pigmentos fotosintéticos y compuestos fenólicos, actividad antioxidante y el contenido total en C y N internos tras 3 y 7 días de incubación. Los valores iniciales del rendimiento cuántico máximo (F v /F m ) fueron significativamente mayores en algas recolectadas en invierno que en verano mientras que la tasa de transporte electrónico máximo (ETR max ) y la eficiencia fotosintética fueron mayores en verano que en invierno en ambas zonas. Por otra parte, la tasa de transporte electrónico determinada bajo radiación solar presentó un patrón diario, con una disminución a mediodía, tanto en invierno como en los períodos de verano. La actividad antioxidante fue mayor en algas recogidas en verano; sin embargo, la concentración interna de compuestos fenólicos fue mayor en invierno que en verano, mientras que en la tasa de excreción se observó lo contrario. La alta capacidad de aclimatación en C. tamariscifolia en algas sometidas a emersión en las plataformas rocosas en verano se explica por su alta fotoinhibición dinámica, su c...

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Section: Discussioncontrasting

confidence: 54%

“…Internal N content was higher in winter-than in summer-collected algae, as is expected according to nitrate content in the water (Ramírez et al 2005). Interestingly, these differences were maintained after 7 days of incubation in cylindrical vessels in spite of the nitrate enrichment (maximum level of 50 mM).…”

Section: Discussionmentioning

confidence: 51%

Seasonal photoacclimation patterns in the intertidal macroalga <em>Cystoseira tamariscifolia</em> (Ochrophyta)

et al. 2014

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“…Although the increased microphytoplankton concentration in the microcosm agreed with field studies in areas with fertilizing processes close to the sampling area, the Strait of Gibraltar (Gómez et al 2000, Echevarría et al 2002, Macias et al 2006) and the upwelling area of the NW Alboran Sea (Ramírez et al 2005, Reul et al 2005, Mercado et al 2012, the shape of the SAS and the magnitude of increasing microphytoplankton were not representative of field conditions. Apart from the mentioned cascade effects, settling is also an important factor that shapes SAS.…”

Section: Carbon Nutrient and Light Effectsmentioning

confidence: 68%

Effect of CO2, nutrients and light on coastal plankton. III. Trophic cascade, size structure and composition

Reul¹,

Muñoz²,

Bautista³

et al. 2014

Aquat. Biol.

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“…The level of 380 ppm used in the experiment as ambient level (LC) of CO 2 is the range surface pCO 2 of the Alborán Sea (367 to 394 ppm of pCO 2 ) according to Takahashi et al (2011) andMcElhany &Busch (2013). This region can be characterized as oligotrophic (Ramírez et al 2005, Mercado et al 2012. The level of 5 µM nitrate is the highest range of the natural levels found during certain periods of the year (Ramírez et al 2005).…”

Section: Algae and Experimental Designmentioning

confidence: 99%

“…This region can be characterized as oligotrophic (Ramírez et al 2005, Mercado et al 2012. The level of 5 µM nitrate is the highest range of the natural levels found during certain periods of the year (Ramírez et al 2005). Thus, the LCLN treatment can be considered a control treatment because it was closest to natural conditions.…”

Section: Algae and Experimental Designmentioning

confidence: 99%

Short-term effects of increasing CO2, nitrate and temperature on three Mediterranean macroalgae: biochemical composition

Figueroa¹,

Barufi²,

Malta³

et al. 2014

Aquat. Biol.

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Seasonal dynamics of inorganic nutrients and phytoplankton biomass in the NW Alboran Sea

Cited by 93 publications

References 53 publications

Seasonal photoacclimation patterns in the intertidal macroalga <em>Cystoseira tamariscifolia</em> (Ochrophyta)

Seasonal photoacclimation patterns in the intertidal macroalga <em>Cystoseira tamariscifolia</em> (Ochrophyta)

Effect of CO2, nutrients and light on coastal plankton. III. Trophic cascade, size structure and composition

Short-term effects of increasing CO2, nitrate and temperature on three Mediterranean macroalgae: biochemical composition

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