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  • 1
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    Seawater carbonate chemistry and plasticity of symbiont acquisition in new recruits of the massive coral Platygyra daedalea (2021)
    PANGAEA
    Details
    Publication Date: 2024-03-15
    Description: Symbiosis establishment is a milestone in the life cycles of most broadcast-spawning corals; however, it remains largely unknown how initial symbiont infection is affected by ocean warming and acidification, particularly for massive corals. This study investigated the combined effects of elevated temperature (29 vs. 31 °C) and pCO2 (450 vs.  1000 μatm) on the recruits of a widespread massive coral, Platygyra daedalea. Results showed that geometric diameter and symbiosis establishment were unaffected by high pCO2, while elevated temperature significantly reduced successful symbiont infection by 50% and retarded the geometric diameter by 6%. Although neither increased temperature, pCO2, nor their interaction affected survival or algal pigmentation of recruits, there was an inverse relationship between symbiont infection rates and survivorship, especially at high temperatures, possibly as a result of oxidative stress caused by algal symbionts under increased temperature. Intriguingly, the proportion of Durusdinium did not increase in recruits at 31 °C, while recruits reared under high pCO2 hosted less Breviolum and more Durusdinium, indicating a high degree of plasticity of early symbiosis and contrasting to the previous finding that heat stress usually leads to the prevalence of thermally tolerant Durusdinium in coral recruits. These results suggest that ocean warming is likely to be more deleterious for the early success of P. daedalea than ocean acidification and provide insights into our understanding of coral-algal symbiotic partnerships under future climatic conditions.
    Keywords: Alkalinity, total; Alkalinity, total, standard deviation; Animalia; Aragonite saturation state; Aragonite saturation state, standard deviation; Benthic animals; Benthos; Bicarbonate ion; Bicarbonate ion, standard deviation; Calcite saturation state; Calcite saturation state, standard deviation; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Calculated using seacarb after Orr et al. (2018); Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard deviation; Carbonate ion; Carbonate ion, standard deviation; Carbonate system computation flag; Carbon dioxide; Carbon dioxide, standard deviation; Cnidaria; Coast and continental shelf; Containers and aquaria (20-1000 L or 〈 1 m**2); Day of experiment; Diameter; EXP; Experiment; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Fugacity of carbon dioxide in seawater, standard deviation; Growth/Morphology; Infection; Laboratory experiment; Luhuitou_fringing_reef; Mortality/Survival; North Pacific; OA-ICC; Ocean Acidification International Coordination Centre; Other studied parameter or process; Partial pressure of carbon dioxide, standard deviation; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH; pH, standard deviation; Platygyra daedalea; Potentiometric; Potentiometric titration; Registration number of species; Salinity; Salinity, standard deviation; Single species; Species; Survival; Temperature; Temperature, water; Temperature, water, standard deviation; Treatment; Tropical; Type; Uniform resource locator/link to reference
    Type: Dataset
    Format: text/tab-separated-values, 18218 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
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    Effects of elevated pCO2 on the post-settlement development of Pocillopora damicornis (2015)
    PANGAEA
    In:  Supplement to: Jiang, Lei; Huang, Hui; Yuan, Xiangcheng; Yuan, Tao; Zhang, Yuyang; Wen, Colin Kuo-Chang; Li, Xiubao; Zhou, Guowei (2015): Effects of elevated pCO2 on the post-settlement development of Pocillopora damicornis. Journal of Experimental Marine Biology and Ecology, 473, 169-175, https://doi.org/10.1016/j.jembe.2015.09.004
    Details
    Publication Date: 2024-03-15
    Description: Ocean acidification represents a key threat to the recruitment of scleractinian corals. Here, we investigated the effect of increased partial pressure of carbon dioxide (pCO2) on the early development of Pocillopora damicornis by rearing the recruits for 12 days at 3 pCO2 levels (446, 896 and 1681 µatm). Results showed that increased pCO2 exerted minor effects on symbiont density and maximum quantum yield (Fv/Fm), while significantly enhanced the relative electron transport through photosystem II (PSII) of Symbiodinium. Notably, calcification and biomass of recruits decreased sharply by 34% and 24% respectively in 896 µatm, and tended to remain constant as pCO2 was raised from 896 to 1681 µatm. Furthermore, recruits in 1681 matm, with comparable surface area as those in 896 µatm, produced fewer buds. These findings indicated that juvenile P. damicornis under high pCO2 would enhance electron transport rate and suppress asexual budding to favor skeletal and tissue growths, which are more critical for their persistence and survival in a high pCO2 environment. This work suggested the physiological plasticity of juvenile corals under short-term exposure to elevated pCO2.
    Keywords: Alkalinity, total; Alkalinity, total, standard error; Animalia; Aragonite saturation state; Aragonite saturation state, standard error; Area; Area, standard error; Benthic animals; Benthos; Bicarbonate ion; Bicarbonate ion, standard error; Biomass/Abundance/Elemental composition; Bottles or small containers/Aquaria (〈20 L); Calcite saturation state; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard error; Carbonate ion; Carbonate ion, standard error; Carbonate system computation flag; Carbon dioxide; Carbon dioxide, standard error; Cnidaria; Coast and continental shelf; Electron transport rate, relative; Electron transport rate, relative, standard error; EXP; Experiment; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Growth/Morphology; Growth rate; Growth rate, standard error; Irradiance; Laboratory experiment; Mass; Mass, standard error; Maximal electron transport rate, relative; Maximal electron transport rate, relative, standard error; Maximum photochemical quantum yield of photosystem II; Maximum photochemical quantum yield of photosystem II, standard error; North Pacific; OA-ICC; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Partial pressure of carbon dioxide (water) at sea surface temperature (wet air), standard error; pH; Pocillopora damicornis; Polyp number; Polyp number, standard error; Potentiometric; Potentiometric titration; Primary production/Photosynthesis; Registration number of species; Salinity; Salinity, standard error; Sanya_Bay; Saturation light intensity; Saturation light intensity, standard error; Single species; Species; Temperature, water; Temperature, water, standard error; Treatment; Tropical; Type; Uniform resource locator/link to reference
    Type: Dataset
    Format: text/tab-separated-values, 1149 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    Seawater carbonate chemistry and calcification of juvenile Pocillopora damicornis (2017)
    PANGAEA
    In:  Supplement to: Jiang, Lei; Zhang, Fang; Guo, Ming-Lan; Guo, Ya Juan; Zhang, Yuyang; Zhou, Guowei; Cai, Lin; Lian, Jian-Sheng; Qian, Pei Yuan; Huang, Hui (2018): Increased temperature mitigates the effects of ocean acidification on the calcification of juvenile Pocillopora damicornis, but at a cost. Coral Reefs, 37(1), 71-79, https://doi.org/10.1007/s00338-017-1634-1
    Details
    Publication Date: 2024-03-15
    Description: This study tested the interactive effects of increased seawater temperature and CO2 partial pressure (pCO2) on the photochemistry, bleaching, and early growth of the reef coral Pocillopora damicornis. New recruits were maintained at ambient or high temperature (29 or 30.8 °C) and pCO2 (500 and 1100 µatm) in a full-factorial experiment for 3 weeks. Neither a sharp decline in photochemical efficiency (Fv/Fm) nor evident bleaching was observed at high temperature and/or high pCO2. Furthermore, elevated temperature greatly promoted lateral growth and calcification, while polyp budding exhibited temperature-dependent responses to pCO2. High pCO2 depressed calcification by 28% at ambient temperature, but did not impact calcification at 30.8 °C. Interestingly, elevated temperature in concert with high pCO2 significantly retarded the budding process. These results suggest that increased temperature can mitigate the adverse effects of acidification on the calcification of juvenile P. damicornis, but at a substantial cost to asexual budding.
    Keywords: Alkalinity, total; Alkalinity, total, standard deviation; Animalia; Aragonite saturation state; Aragonite saturation state, standard deviation; Benthic animals; Benthos; Bicarbonate ion; Bleaching; Budding rate; Calcification/Dissolution; Calcification rate; Calcite saturation state; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard deviation; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Cnidaria; Coast and continental shelf; Containers and aquaria (20-1000 L or 〈 1 m**2); EXP; Experiment; Experiment duration; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Growth/Morphology; Growth rate; Laboratory experiment; Luhuitou_fringing_reef; Maximum photochemical quantum yield of photosystem II; North Pacific; OA-ICC; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide, standard deviation; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH; pH, standard deviation; Pocillopora damicornis; Potentiometric; Potentiometric titration; Primary production/Photosynthesis; Registration number of species; Salinity; Single species; Species; Temperature; Temperature, water; Temperature, water, standard deviation; Tropical; Type; Uniform resource locator/link to reference
    Type: Dataset
    Format: text/tab-separated-values, 9660 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    Seawater carbonate chemistry and photochemical efficiency and symbiont density of reef coral Pocillopora damicornis (2022)
    PANGAEA
    Details
    Publication Date: 2024-03-15
    Description: Establishing the thermal reaction norm of coral larvae under elevated pCO2 is crucial to anticipate how larval dispersal and population maintenance may be affected by future climate change. Here, we characterized the functional relationship between temperature (27−33 °C) and larval performance of the reef coral Pocillopora damicornis under two pCO2 levels. The results showed that the temperature threshold of larvae was between 32 and 33 °C, as evidenced by the abrupt declines in photochemical efficiency and symbiont density, whereas no oxidative damage was observed between 27 and 33 °C and elevated pCO2 did not influence any of these parameters. In addition, larval respiration and photosynthesis rates exhibited parabolic responses to temperature, and this relationship conformed to the Gaussian–Gompertz model with an optimal temperature around 31.5 °C, which was approximately 2.5 °C above the summer mean temperature, suggesting the potential for thermal acclimation. Most importantly, elevated pCO2 significantly enhanced the larval photosynthesis and the stimulatory effect of elevated pCO2 on the photosynthetic rates and capacity was more pronounced in cool and warm temperatures, indicative of shifted thermal sensitivity under high pCO2. These results suggest that ocean acidification could alter the thermal performance curves and tolerance window of brooded P. damicornis larvae, with profound and important implications for larval ecology in a future changing ocean.
    Keywords: Alkalinity, total; Alkalinity, total, standard deviation; Animalia; Aragonite saturation state; Aragonite saturation state, standard deviation; Bicarbonate ion; Bottles or small containers/Aquaria (〈20 L); Calcite saturation state; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Cnidaria; Coast and continental shelf; EXP; Experiment; Experiment duration; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Gross photosynthesis rate, oxygen, per individual; Laboratory experiment; Luhuitou_fringing_reef; Malondialdehyde, per protein mass; Mortality/Survival; Net photosynthesis rate, oxygen, per individual; North Pacific; OA-ICC; Ocean Acidification International Coordination Centre; Other studied parameter or process; Partial pressure of carbon dioxide, standard deviation; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Pelagos; pH; pH, standard deviation; Photochemical efficiency; Pocillopora damicornis; Potentiometric; Potentiometric titration; Primary production/Photosynthesis; Ratio; Registration number of species; Respiration; Respiration rate, oxygen, per individual; Salinity; Salinity, standard deviation; Single species; Species; Survival; Symbiont cell density per larvae; Temperature; Temperature, water; Temperature, water, standard deviation; Treatment; Tropical; Type; Uniform resource locator/link to reference; Zooplankton
    Type: Dataset
    Format: text/tab-separated-values, 4840 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    Seawater carbonate chemistry and physiological responses of coral recruits (2019)
    PANGAEA
    Details
    Publication Date: 2024-03-20
    Description: Diurnal pCO2 fluctuations have the potential to modulate the biological impact of ocean acidification (OA) on reef calcifiers, yet little is known about the physiological and biochemical responses of scleractinian corals to fluctuating carbonate chemistry under OA. Here, we exposed newly settled Pocillopora damicornis for 7 days to ambient pCO2, steady and elevated pCO2 (stable OA) and diurnally fluctuating pCO2 under future OA scenario (fluctuating OA). We measured the photo-physiology, growth (lateral growth, budding and calcification), oxidative stress and activities of carbonic anhydrase (CA), Ca-ATPase and Mg-ATPase. Results showed that while OA enhanced the photochemical performance of in hospite symbionts, it also increased catalase activity and lipid peroxidation. Furthermore, both OA treatments altered the activities of host and symbiont CA, suggesting functional changes in the uptake of dissolved inorganic carbon (DIC) for photosynthesis and calcification. Most importantly, only the fluctuating OA treatment resulted in a slight drop in calcification with concurrent up-regulation of Ca-ATPase and Mg-ATPase, implying increased energy expenditure on calcification. Consequently, asexual budding rates decreased by 50% under fluctuating OA. These results suggest that diel pCO2 oscillations could modify the physiological responses and potentially alter the energy budget of coral recruits under future OA, and that fluctuating OA is more energetically expensive for the maintenance of coral recruits than stable OA.
    Keywords: Alkalinity, total; Alkalinity, total, standard deviation; Animalia; Aragonite saturation state; Aragonite saturation state, standard deviation; Benthic animals; Benthos; Bicarbonate ion; Biomass per individual; Budding rate; Calcification/Dissolution; Calcification per individual; Calcite saturation state; Calcium adenosine triphosphatase activity; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard deviation; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Catalase, unit per protein mass; Catalase activity, unit per protein mass; Cnidaria; Coast and continental shelf; Containers and aquaria (20-1000 L or 〈 1 m**2); Effective quantum yield; Excitation pressure; EXP; Experiment; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Growth/Morphology; Growth rate; Identification; Laboratory experiment; Lipid peroxidation, per protein; Luhuitou_reef; Magnesium adenosine triphosphatase activity; Maximum quantum yield of photosystem II; Non photochemical quenching; North Pacific; OA-ICC; Ocean Acidification International Coordination Centre; Other; Other metabolic rates; Partial pressure of carbon dioxide, standard deviation; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH; pH, standard deviation; Pocillopora damicornis; Potentiometric; Potentiometric titration; Primary production/Photosynthesis; Registration number of species; Reproduction; Salinity; Salinity, standard deviation; Single species; Species; Temperature, water; Temperature, water, standard deviation; Time point, descriptive; Treatment; Tropical; Type; Uniform resource locator/link to reference
    Type: Dataset
    Format: text/tab-separated-values, 10497 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
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    LncRNA XIST regulates myocardial infarction by targeting miR-130a-3p (2017)
    Wiley-Blackwell
    Details
    Publication Date: 2017-12-12
    Description: The study was employed to probe long non-coding RNA X-inactive specific transcript RNA (lncRNA XIST) expression profile and its influence on cell cycle, proliferation and apoptosis in myocardial cells. We also aimed to explore the possible meditating relationship between XIST, PDE4D and miR-130a-3p. Gene differential analysis was carried out using Human LncRNA Microarray V3.0. Quantitative real-time PCR (qRT-PCR) was used to test mRNA expressions of XIST, miR-130a-3p and PDE4D in normal cells and post-myocardial infarction (MI) cells. Western blot was applied to determine the protein expression profile of PED4D . Changes in viability and cell cycle/apoptosis of post-MI myocardial cells after silencing of XIST or PDE4D were investigated by MTT assay and flow cytometry, respectively. The targeting relationship between miR-130a-3p and XIST, PDE4D in myocardial cells were verified by dual luciferase reporter assay. Simulated MI environment was constructed by performing anoxic preconditioning in normal cells to probe the influence of XIST on myocardial cell apoptosis. XIST and PDE4D were overexpressed in post-MI myocardial cells, while miR-130a-3p was underexpressed in post-MI myocardial cells. High-expressed XIST and PDE4D both promoted myocardial cell apoptosis. High-expressed XIST also inhibited myocardial cell proliferation. XIST down-regulated miR-130a-3p and PDE4D was a direct target of miR-130a-3p. LncRNA XIST promotes MI by targeting miR-130a-3p. MI induced by PDE4D can be reversed by miR-130a-3p. This article is protected by copyright. All rights reserved
    Electronic ISSN: 1097-4652
    Topics: Biology , Medicine
    Published by Wiley-Blackwell
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  • 7
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    Effects of astragalus polysaccharide on apoptosis of myocardial microvascular endothelial cells in rats undergoing hypoxia/reoxygenation by mediation of the PI3K/Akt/eNOS signaling pathway (2017)
    Wiley-Blackwell
    Details
    Publication Date: 2017-06-29
    Description: ABSTRACT The study explores the effect of astragalus polysaccharide (APS) mediating P13K/Akt/eNOS signaling pathway on apoptosis of myocardial microvascular endothelial cells (MMECs) in hypoxia/reoxygenation (H/R). MMECs were classified into blank, H/R, H/R + 25 mg/L APS, H/R + 50 mg/L APS, H/R + 100 mg/L APS, H/R + LY and HR + 100 mg/L APS + LY groups. Cell viability was detected using MTT assay and apoptotic cell morphological changes by Hoechst staining. NO content, cell cycle and apoptosis, PI3K/Akt/eNOS signaling pathway proteins were detected using nitrate reductase assay, flow cytometry and western blotting. An increased cell survival rate, NO content and expression of PI3K/Akt/eNOS signaling pathway associated proteins, and a decreased apoptosis rate was observed in the H/R + 50 mg/L APS and H/R + 100 mg/L APS groups compared with the H/R and H/R + 25 mg/L APS groups. Compared with the H/R + 50 mg/L APS group, the apoptosis rate decreased, whereas the cell survival rate, NO content and expression of PI3K/Akt/eNOS signaling pathway associated proteins increased in the H/R + 100 mg/L APS group. The H/R + LY and HR + 100 mg/L APS + LY groups followed opposite trends. In comparison to the HR + 100 mg/L APS group, the apoptosis rate in the H/R + LY and HR + 100 mg/L APS + LY groups increased, and the cell survival rate, NO content and expression of PI3K/Akt/eNOS signaling pathway associated proteins decreased. Collectively, APS improves the damage caused by H/P by mediating PI3K/Akt/eNOS signaling pathway. This article is protected by copyright. All rights reserved
    Electronic ISSN: 0091-7419
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Published by Wiley-Blackwell
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