Growth, DMS and DMSP production in Emiliania huxleyi under elevated CO2 and UV radiation

Yu, Juan; Tian, Jiyuan; Gao, Guang; Xu, Ruiyi; Lai, Jing‐Guang; Yang, Gui‐Peng

doi:10.1016/j.envpol.2021.118643

Cited by 5 publications

(2 citation statements)

References 62 publications

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“…Coccolithophores can contribute up to 10% of marine primary production over the global surface ocean, and about 50% of pelagic CaCO 3 sediments (Poulton et al 2007, Broecker & Clark 2009. They are also a major producer of dimethyl sulfoniopropionate (DMSP), which is a precursor of dimethyl sulfide (DMS), a volatile biogenic active gas influencing climate (Yu et al 2022). DMS is the dominant precursor for cloud condensation nuclei in the marine atmosphere, and the emissions decrease solar radiation due to increasing cloud cover (Brown & Yoder 1994).…”

Section: Introductionmentioning

confidence: 99%

Observation of a coccolithophore <i>Gephyrocapsa oceanica</i> bloom in the temperate coastal waters of Sagami Bay, Japan

Yano,

Takayama,

Shimode

et al. 2024

Plankton Benthos Res

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In mid-May 2020, a coccolithophore bloom of Gephyrocapsa oceanica Kamptner, 1943 was observed in Sagami Bay, Japan, possibly for the first time in 25 years. This species is a common yet elusive taxon in the waters around Japan, but there has only been one report of a bloom observation in Sagami Bay in 1995. The G. oceanica bloom in 2020 was observed by the combined approach of the JAXA ocean color remote sensing satellite "Shikisai" and field surveys. The true-color RGB images from the satellite showed the initial bloom in Tokyo Bay appears to have advected into Sagami Bay on May 5. On May 15, ad hoc field sampling was conducted based on visual confirmation from the shore. Nitrate, nitrite and phosphate concentrations at the sea surface were 3.28 µM, 0.11 µM and 0.29 µM, respectively, and higher than the median of May from 1997 to 2019. Chlorophyll a concentration was 2.23 µg L −1 at the sea surface, and cell density was 5.3 × 10 3 cells mL −1 . The large bloom appears to have reached the western shorelines of the bay, and dispersed counterclockwise within the bay. The bloom reached an estimated 1119.02 km 2 surface expression on May 17, and completely disappeared by May 24. Further, the median value of 19′-hexanoyloxyfucoxanthin (a signature pigment of haptophytes, including coccolithophores) concentration has been increasing from 2017 to 2020, and the coastal area of Sagami Bay may have changed to a region favorable for haptophytes.

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Section: Introductionmentioning

confidence: 99%

Observation of a coccolithophore <i>Gephyrocapsa oceanica</i> bloom in the temperate coastal waters of Sagami Bay, Japan

Yano,

Takayama,

Shimode

et al. 2024

Plankton Benthos Res

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“…It has been suggested that UVR can bring extensively deleterious influences on the growth, physiological performances and primary production of algae (Li et al, 2022a). For instance, excessive UVB (280-315 nm) impairs DNA and PSII protein synthesis of phytoplankton, inhibits its growth and photosynthetic activity, and stimulates the increase of reactive oxygen species (ROS) and photoprotective pigments (Yu et al, 2022). Furthermore, membrane proteins can also be damaged by UVB, limiting nutrient uptake and carbon assimilation (Chen et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Effects of seawater acidification and solar ultraviolet radiation on photosynthetic performances and biochemical compositions of Rhodosorus sp. SCSIO-45730

Wang

Yang

et al. 2022

Front. Mar. Sci.

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Ocean acidification (OA) caused by rising atmospheric CO2 concentration and solar ultraviolet radiation (UVR) resulting from ozone depletion may affect marine organisms, but little is known regarding how unicellular Rhodosorus sp. SCSIO-45730, an excellent species resource containing various biological-active compounds, responds to OA and UVR. Therefore, we conducted a factorial coupling experiment to unravel the combined effects of OA and UVR on the growth, photosynthetic performances, biochemical compositions and enzyme activities of Rhodosorus sp. SCSIO-45730, which were exposed to two levels of CO2 (LC, 400 μatm, current CO2 level; HC, 1000 μatm, future CO2 level) and three levels of UVR (photosynthetically active radiation (PAR), PAR plus UVA, PAR plus UVB) treatments in all combinations, respectively. Compared to LC treatment, HC stimulated the relative growth rate (RGR) due to higher optimum and effective quantum yields, photosynthetic efficiency, maximum electron transport rates and photosynthetic pigments contents regardless of UVR. However, the presence of UVA had no significant effect but UVB markedly reduced the RGR. Additionally, higher carbohydrate content and lower protein and lipid contents were observed when Rhodosorus sp. SCSIO-45730 was cultured under HC due to the ample HCO3− applications and active stimulation of metabolic enzymes of carbonic anhydrase and nitrate reductase, thus resulting in higher TC/TN. OA also triggered the production of reactive oxygen species (ROS), and the increase of ROS coincided approximately with superoxide dismutase and catalase activities, as well as phenols contents. However, UVR induced photochemical inhibition and damaged macromolecules, making algal cells need more energy for self-protection. Generally, these results revealed that OA counteracted UVR-related inhibition on Rhodosorus sp. SCSIO-45730, adding our understanding of the red algae responding to future global climate changes.

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Effects of elevated temperature and acidification on sulfate assimilation and reduction of microalgae

Duan

et al. 2023

J Appl Phycol

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Growth, DMS and DMSP production in Emiliania huxleyi under elevated CO2 and UV radiation

Cited by 5 publications

References 62 publications

Observation of a coccolithophore <i>Gephyrocapsa oceanica</i> bloom in the temperate coastal waters of Sagami Bay, Japan

Observation of a coccolithophore <i>Gephyrocapsa oceanica</i> bloom in the temperate coastal waters of Sagami Bay, Japan

Effects of seawater acidification and solar ultraviolet radiation on photosynthetic performances and biochemical compositions of Rhodosorus sp. SCSIO-45730

Effects of elevated temperature and acidification on sulfate assimilation and reduction of microalgae

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