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

Figueroa, Félix L.; Barufi, José Bonomi; Malta, Erik-jan; Conde-Álvarez, Rafael M.; Nitschke, Udo; Arenas, Francisco; Mata, Teresa M.; Connan, Solène; Abreu, Helena; Marquardt, Ronny; Vaz-Pinto, Fátima; Konotchick, Talina; Celis-Plá, Paula S. M.; Hermoso, Michaël; Ordoñez, G.; Ruiz, Emilio Muñoz; Flores, Pilar; Ríos, J. de los; Kirke, D.A.; Chow, Fungyi; Nassar, Cristina Aparecida Gomes; Robledo, Daniel; Pérez-Ruzafa, Ángel; Bañares‐España, Elena; Altamirano, Marı́a; Jiménez, Carlos; Korbee, Nathalie; Bischof, Kai; Stengel, Dagmar B.

doi:10.3354/ab00610

Cited by 51 publications

(20 citation statements)

References 104 publications

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“…By contrast, due to their weight, all C. tamariscifolia and E. elongata specimens were permanently placed at the bottom of the vessels, even though the same vigorous water movement was applied, and it is likely that these 2 species experienced a more constant light climate. In the case of C. tama riscifolia, water colour changed over time, which explained the differences in light levels between surface and bottom measurements; most likely this change in water colour and light penetration was related to the exudation of phenolics released by C. tamariscifolia (Figueroa et al 2014c); such ex u da tion of screening compounds has already been observed under high light for the brown macroalga Macro cystis integrifolia (Swanson & Druehl 2002). In the confined environment of the experimental vessels, this exudation resulted in reduced light, particularly UV, availability.…”

Section: Light Climate Within Vesselsmentioning

confidence: 99%

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Short-term effects of CO2, nutrients and temperature on three marine macroalgae under solar radiation

Stengel¹,

Conde-Álvarez²,

Connan³

et al. 2014

Aquat. Biol.

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Three macroalgal species belonging to Chlorophyta (Ulva rigida), Rhodophyta (Ellisolandia elongata) and Phaeophyceae (Heterokontophyta; Cystoseira tamariscifolia), naturally growing at the same shore level and representing 3 morpho-functional groups, were exposed to short-term changes in temperature under different carbon and nitrogen regimes. Experiments were conducted in outdoor tanks at 4 combinations of carbon and nitrogen levels under reduced solar radiation. In vivo chl a fluorescence parameters and pigment contents were monitored to assess diurnal physiological responses and potential for recovery. Strong fluctuations in chl a fluorescence parameters, but not in chl a content, were observed in response to diurnal variation in solar radiation and light climate within the tanks; sensitivity varied between algal species and, in some cases, depended on the carbon and nitrogen regime. Nitrogen uptake was similarly high in U. rigida and E. elongata and lowest in C. tamariscifolia. In U. rigida and E. elongata, chl a concentrations decreased after high-carbon treatments. Effective photosystem II quantum efficiency was reduced in all species at noon, and lowest in C. tamariscifolia. The results highlight the complexity of physiological short-term acclimations which were most likely linked to biochemical changes at the cellular level. Long-term experiments are required in future for more comprehensive investigation of the observed interactive effects of the different environmental parameters

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Section: Light Climate Within Vesselsmentioning

confidence: 99%

“…Regarding Cystoseira tamariscifolia, both PAR and UVR were considerably lower at the bottom compared to surface solar radiation (Fig. 2c), and nearly no UV radiation was available at depth due to absorption by exuded phenolic compounds (Figueroa et al 2014c). …”

Section: Light Climatementioning

confidence: 99%

Short-term effects of CO2, nutrients and temperature on three marine macroalgae under solar radiation

Stengel¹,

Conde-Álvarez²,

Connan³

et al. 2014

Aquat. Biol.

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“…This is in agreement with the use of nitrate by this nitrophilic species, increasing the use of it as a sink of electrons due to the demand of ATP and NADPH for nitrate reduction to amino acids and proteins. The susceptibility to N availability has been reported both at photosynthetic and biochemical levels in U. rigida (Cabello-Pasini & Figueroa 2005, Figueroa et al 2014. These data seem to indicate that a higher nitrate availability would be related not only to a slower decrease in energy efficiency throughout the morning but also to a greater capacity to process the energy available throughout the day, while CO 2 did not have an impact.…”

Section: During the Light Periodsmentioning

confidence: 69%

“…Each sample holder was positioned in the treatment vessels (one head per treatment) ( Fig. 1A), which contained other U. rigida thalli used for different measurements and analyses (Figueroa et al 2014, this Theme Section, Stengel et al 2014. Although the sample holder was positioned very close to the water surface, other floating Ulva thalli could not be prevented from passing over the sensor, causing some temporal shading.…”

Section: Species and Experimental Designmentioning

confidence: 99%

Continuous monitoring of in vivo chlorophyll a fluorescence in Ulva rigida (Chlorophyta) submitted to different CO2, nutrient and temperature regimes

Figueroa¹,

Conde-Álvarez²,

Barufi³

et al. 2014

Aquat. Biol.

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A Monitoring-PAM fluorometer with high temporal resolution (every 5 min) was used to assess the effects on photosynthesis in Ulva rigida (Chlorophyta) during exposure to 2 different CO 2 conditions: current ('LC', 390 ppm), and the predicted level for the year 2100 ('HC', 700 ppm) in a crossed combination with 2 different daily pulsed nitrate concentrations ('LN', 5 µM and 'HN', 50 µM) and 2 temperature regimes (ambient and ambient + 4°C). Effective quantum yield (ΔF/F m ') in the afternoon was lower under HCLN conditions than under the other treatments. The decrease in ΔF/F m ' from noon to the afternoon was significantly lower under + 4°C compared to ambient temperature. Maximal quantum yield (F v /F m) decreased during the night with a transient increase 1 to 3 h after sunset, whereas a transient increase in ΔF/F m ' was observed after sunrise. These transient increases have been related to activation/deactivation of the electron transport rate and the relaxation of non-photochemical quenching. Relative electron transport rate was higher under the LC and + 4°C treatment, but the differences were not significant due to high variability in daily irradiances. Redundancy analysis on the data matrix for the light periods indicates that photosynthetically active radiation through the day is the main variable determining the physiological responses. The effects of nutrient levels (mainly carbon) and experimental increase of temperature were low but significant. During the night, the effect of nutrient availability is of special importance with an opposite effect of nitrogen compared to carbon increase. The application of the Monitoring-PAM to evaluate the effects of environmental conditions by simulating climate change variations under outdoor-controlled, semi-controlled conditions is discussed. KEY WORDS: Climate change • In vivo chlorophyll fluorescence • Monitoring-PAM • Nitrate • Ocean acidification • Temperature • Ulva rigida OPEN PEN ACCESS CCESS Contribution to the Theme Section 'Environmental forcing of aquatic primary productivity'

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“…Increasing irradiance levels enhance the production and accumulation of ROS, which leads to a subsequent increase in antioxidant activity (Celis‐Plá et al., ; Ji, Xu, Zou, & Gao, ) and in photoprotective compounds such as carotenoids (Ramlov et al., ; Wu, ). The increase in antioxidant activity is thus interpreted as an increase in environmental stress caused by changes in the factors controlling photosynthesis such as excess light (Figueroa et al., ). Furthermore, excessive irradiance can damage the photosynthetic pigments Chl‐ a and phycobiliproteins (Figueroa et al., ).…”

Section: Introductionmentioning

confidence: 99%

Depth influence on biochemical performance and thallus size of the red alga Gelidium corneum

et al. 2018

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Recent declines in the foundation species Gelidium corneum (Hudson) J.V. Lamouroux in pristine coastal stretches of the Southeastern Bay of Biscay have been documented in which individuals showed a high bleaching incidence. Among the potential factorsthat may be responsible for these changes in G. corneum abundance, it has been suggested that high levels of irradiance may be imposing stressful environmental conditions for shallow populations. Given that light is reduced exponentially as depth increases, in this investigation we examined the influence of depth on the stress of G. corneum by comparing the performance of several biochemical parameters and thallus size in plants collected at three different depths. The results revealed that plants growing in shallow waters showed lower antioxidant activity, lower concentrations of photosynthetic pigments (Chl‐a, total carotenoids, phycoerythrin), lower internal nitrogen levels (higher C:N ratio) and shorter thallus lengths than those living in deeper waters. Some of these results may be an expression of photoacclimation, but the low antioxidant activity and total carotenoid concentration detected in plants living in shallow waters suggest that the photoprotective mechanisms of G. corneum may have failed to offset photodamage. If so, our findings support previous studies that suggest that recent changes in solar radiation are partially responsible for G. corneum declines. Nevertheless, given that the metabolic performance of macroalgae is determined by the inter‐play of irradiance with other factors, including temperature and nutrient availability, further research is needed to reach a better understanding of the factors causing stress in G. corneum.

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

Cited by 51 publications

References 104 publications

Short-term effects of CO2, nutrients and temperature on three marine macroalgae under solar radiation

Short-term effects of CO2, nutrients and temperature on three marine macroalgae under solar radiation

Continuous monitoring of in vivo chlorophyll a fluorescence in Ulva rigida (Chlorophyta) submitted to different CO2, nutrient and temperature regimes

Depth influence on biochemical performance and thallus size of the red alga Gelidium corneum

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