Increased irradiance availability mitigates the physiological performance of species of the calcifying green macroalga Halimeda in response to ocean acidification

Wei, Zhangliang; Long, Chao; Yang, Fangfang; Huo, Yuanzi; Ding, Dewen; Mo, Jiahao

doi:10.1016/j.algal.2020.101906

Cited by 13 publications

(16 citation statements)

References 67 publications

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“…For instance, a direct indicator of oxidative stress and damage is the level of malondialdehyde (MDA) as a biochemical marker for lipid peroxidation, which is the result of the decomposition of polyunsaturated fatty acids in cell membranes [ 16 ]. Thus, MDA often accumulates under oxidative stress, and it has widely been used to distinguish between stressed and unstressed seaweeds (e.g., [ 13 , 17 , 18 ]).…”

Section: Introductionmentioning

confidence: 99%

Antioxidative Properties of Baltic Sea Keystone Macroalgae (Fucus vesiculosus, Phaeophyceae) under Ocean Warming and Acidification in a Seasonally Varying Environment

Graiff

Karsten

2021

Biology

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The keystone macroalga Fucus vesiculosus (Phaeophyceae), dominating shallow hard bottom zones, encounters a strongly and rapidly changing environment due to anthropogenic change over the last decades in the Baltic Sea. Thus, in four successive benthic mesocosm experiments, the single and joint effects of increased temperature (Δ + 5 °C) and pCO2 (1100 ppm) under ambient irradiances were experimentally tested on the antioxidative properties of western Baltic F. vesiculosus in all seasons. The antioxidative properties (superoxide dismutase activity and lipid peroxidation) as well as the sensitivity of F. vesiculosus photosynthetic performance (i.e., effective quantum yield) to oxidative stress under these global change scenarios were seasonally examined. F. vesiculosus exhibited high and relatively constant photosynthetic performance under artificial hydrogen peroxide (H2O2) stress in all seasons. High activities of superoxide dismutase and a relatively low degree of the biomarker for lipid peroxidation (malondialdehyde concentration) were found in F. vesiculosus. Thus, Baltic F. vesiculosus is equipped with a high antioxidative potential to tolerate strong oxidative stress for at least short periods. Antioxidative properties of F. vesiculosus were more strongly affected by warming than by acidification, resulting in significantly increased malondialdehyde concentrations under elevated temperature levels in all seasons. Oxidative stress was enhanced in F. vesiculosus under warming but seem to be modulated by seasonally varying environmental conditions (e.g., high and low irradiances) and pCO2 levels. However, more frequent summer heatwaves reaching and surpassing lethal temperatures in shallow coastal waters may determine the F. vesiculosus population’s overall persistence in the Baltic Sea.

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Section: Introductionmentioning

confidence: 99%

Antioxidative Properties of Baltic Sea Keystone Macroalgae (Fucus vesiculosus, Phaeophyceae) under Ocean Warming and Acidification in a Seasonally Varying Environment

Graiff

Karsten

2021

Biology

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“…However, downward trends in growth rate and pigment accumulation have been observed in Pyropia yezoensis (Mercado et al, 1999) and calcifying macroalgae Halimeda spp. (Campbell et al, 2016;Wei et al, 2020a). Egilsdottir et al (2013) investigated the lower mMg/Ca ratio of calcite and fewer structures in new fragments produced by the red calcareous coralline alga Corallina elongata under elevated pCO 2 (550, 750, and 1,000 ppmv) conditions.…”

Section: Introductionmentioning

confidence: 99%

“…The Halimeda genus of green calcareous macroalgae (Chlorophyta, Bryopsidales) is an ecologically important carbonate macroalgae that is widely distributed in tropical and sub-tropical reefs and lagoons (Hofmann et al, 2014;Wei et al, 2020a;Wei et al, 2020b;Wei et al, 2020c). On a global scale, carbonate sediment production by Halimeda species accounts for nearly 8% of the carbonate budget, at 0.15-0.4 Gt CaCO 3 year −1 (Milliman, 1993;Hillis, 2001).…”

Section: Introductionmentioning

confidence: 99%

“…Studies have documented that biotic CaCO 3 precipitation is significantly and adversely affected by the elevation of seawater pCO 2 , because the CaCO 3 saturation (W) and pH values are consequently reduced. However, moderate elevations in pCO 2 induce a higher HCO − 3 availability, which contributes to calcification and photosynthesis processes (Hofmann et al, 2014;Vogel et al, 2015;Campbell et al, 2016;Wei et al, 2020a). For instance, Yildiz et al (2013) found that low pH (7.7) increased the relative electron transport rates (rETR) of calcified rhodophyte Corallina officinalis.…”

Section: Introductionmentioning

confidence: 99%

“…For instance, Yildiz et al (2013) found that low pH (7.7) increased the relative electron transport rates (rETR) of calcified rhodophyte Corallina officinalis. These wide variety of responses by calcifiers is likely due to either taxonomic distinctions (Kroeker et al, 2010;Peach et al, 2017) or the interactive effects of other environmental factors, such as light intensities (Teichberg et al, 2013;Wei et al, 2020a), seawater temperature (Campbell et al, 2016), nutrient regimes (Teichberg et al, 2013) and/or pH fluctuations (Cornwall et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

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Diurnal fluctuations in seawater pCO2 amplify the negative effects of ocean acidification on the biotic performance of the calcifying macroalga Halimeda opuntia

et al. 2022

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Although the adverse effects of increasing atmospheric CO2-induced ocean acidification (OA) on marine calcifying macroalgae have been widely reported, there are limited studies on how daily fluctuations in pCO2 (pH) within shallow ecosystems influence the growth and physiological performance of these calcifiers. Therefore, a 42-day laboratory mimetic experiment to determine how growth, biological performance and related carbon and nitrogen metabolic products of the calcifying macroalga, Halimeda opuntia are generated in response to fluctuating pCO2 under OA conditions (1200 ppmv) was performed. The results of present study showed that the adverse effects of OA were more determined by the adverse influence of elevated acidity (H+) on growth rates, calcification, photosynthesis and the related biotic performance of H. opuntia compared with the positive effects that higher CO2 provided. Moreover, diurnal fluctuations in pCO2 levels [with higher (nearly 8.10) and lower pH (nearly 7.40) values during day and night times, respectively] have amplified these negative influences on H. opuntia. To mitigate elevated pCO2-related stress, higher contents of free amino acids and proline were highly secreted and likely linked to protecting the integrity of algal cellular structures. The above results contribute to increasing our understanding of the biological consequences of pCO2 (pH) variability on calcifying Halimeda species and their physiological plasticity in response to further oceanic pCO2 changes.

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Increased light availability enhances tolerance against ocean acidification-related stress in the calcifying macroalga Halimeda opuntia

et al. 2022

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Increased irradiance availability mitigates the physiological performance of species of the calcifying green macroalga Halimeda in response to ocean acidification

Cited by 13 publications

References 67 publications

Antioxidative Properties of Baltic Sea Keystone Macroalgae (Fucus vesiculosus, Phaeophyceae) under Ocean Warming and Acidification in a Seasonally Varying Environment

Antioxidative Properties of Baltic Sea Keystone Macroalgae (Fucus vesiculosus, Phaeophyceae) under Ocean Warming and Acidification in a Seasonally Varying Environment

Diurnal fluctuations in seawater pCO2 amplify the negative effects of ocean acidification on the biotic performance of the calcifying macroalga Halimeda opuntia

Increased light availability enhances tolerance against ocean acidification-related stress in the calcifying macroalga Halimeda opuntia

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