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  • 1
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    Interactive Effects of Ocean Acidification, Elevated Temperature, and Reduced Salinity on Early-Life Stages of the Pacific Oyster (2014)
    American Chemistry Society
    In:  Environmental Science & Technology, 48 (17). pp. 10079-10088.
    Details
    Publication Date: 2018-01-16
    Description: Ocean acidification (OA) effects on larvae are partially attributed for the rapidly declining oyster production in the Pacific Northwest region of the United States. This OA effect is a serious concern in SE Asia, which produces 〉80% of the world’s oysters. Because climate-related stressors rarely act alone, we need to consider OA effects on oysters in combination with warming and reduced salinity. Here, the interactive effects of these three climate-related stressors on the larval growth of the Pacific oyster, Crassostrea gigas, were examined. Larvae were cultured in combinations of temperature (24 and 30 °C), pH (8.1 and 7.4), and salinity (15 psu and 25 psu) for 58 days to the early juvenile stage. Decreased pH (pH 7.4), elevated temperature (30 °C), and reduced salinity (15 psu) significantly delayed pre- and post-settlement growth. Elevated temperature lowered the larval lipid index, a proxy for physiological quality, and negated the negative effects of decreased pH on attachment and metamorphosis only in a salinity of 25 psu. The negative effects of multiple stressors on larval metamorphosis were not due to reduced size or depleted lipid reserves at the time of metamorphosis. Our results supported the hypothesis that the C. gigas larvae are vulnerable to the interactions of OA with reduced salinity and warming in Yellow Sea coastal waters now and in the future.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1021/es501611u
    Location Call Number Limitation Availability
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 2
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    Biological impacts of ocean acidification: a postgraduate perspective on research priorities (2013)
    Springer
    In:  Marine Biology, 160 (8). pp. 1789-1805.
    Details
    Publication Date: 2019-01-22
    Description: Research into the effects of ocean acidification (OA) on marine organisms has greatly increased during the past decade, as realization of the potential dramatic impacts has grown. Studies have revealed the multifarious responses of organisms to OA conditions, indicating a high level of intra- and interspecific variation in species’ ability to accommodate these alterations. If we are to provide policy makers with sound, scientific input regarding the expected consequences of OA, we need a broader understanding of these predicted changes. As a group of 20 multi-disciplinary postgraduate students from around the globe, with a study focus on OA, we are a strong representation of ‘next generation’ scientists in this field. In this unique cumulative paper, we review knowledge gaps in terms of assessing the biological impacts of OA, outlining directions for future research.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1007/s00227-012-2033-3
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 3
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    The proteome of Atlantic herring (Clupea harengus L.) larvae is resistant to elevated pCO2 (2014)
    Elsevier
    In:  Marine Pollution Bulletin, 86 (1-2). pp. 154-160.
    Details
    Publication Date: 2019-09-23
    Description: Elevated anthropogenic pCO2 can delay growth and impair otolith structure and function in the larvae of some fishes. These effects may concurrently alter the larva’s proteome expression pattern. To test this hypothesis, Atlantic herring larvae were exposed to ambient (370 μatm) and elevated (1800 μatm) pCO2 for one-month. The proteome structure of the larvae was examined using a 2-DE and mass spectrometry. The length of herring larvae was marginally less in the elevated pCO2 treatment compared to the control. The proteome structure was also different between the control and treatment, but only slightly: the expression of a small number of proteins was altered by a factor of less than 2-fold at elevated pCO2. This comparative proteome analysis suggests that the proteome of herring larvae is resilient to elevated pCO2. These observations suggest that herring larvae can cope with levels of CO2 projected for near future without significant proteome-wide changes.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1016/j.marpolbul.2014.07.030
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 4
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    Elevated CO2 alters larval proteome and its phosphorylation status in the commercial oyster, Crassostrea hongkongensis (2013)
    PANGAEA
    In:  Supplement to: Dineshram, R; Thiyagarajan, Vengatesen; Lane, Ackley Charles; Yu, Ziniu; Shu, Xiao; Leung, Priscilla TY (2013): Elevated CO2 alters larval proteome and its phosphorylation status in the commercial oyster, Crassostrea hongkongensis. Marine Biology, 160(8), 2189-2205, https://doi.org/10.1007/s00227-013-2176-x
    Details
    Publication Date: 2024-03-15
    Description: Ocean acidification (OA) is beginning to have noticeable negative impact on calcification rate, shell structure and physiological energy budgeting of several marine organisms; these alter the growth of many economically important shellfish including oysters. Early life stages of oysters may be particularly vulnerable to OA-driven low pH conditions because their shell is made up of the highly soluble form of calcium carbonate (CaCO3) mineral, aragonite. Our long-term CO2 perturbation experiment showed that larval shell growth rate of the oyster species Crassostrea hongkongensis was significantly reduced at pH 〈 7.9 compared to the control (8.2). To gain new insights into the underlying mechanisms of low-pH-induced delays in larval growth, we have examined the effect of pH on the protein expression pattern, including protein phosphorylation status at the pediveliger larval stage. Using two-dimensional electrophoresis and mass spectrometry, we demonstrated that the larval proteome was significantly altered by the two low pH treatments (7.9 and 7.6) compared to the control pH (8.2). Generally, the number of expressed proteins and their phosphorylation level decreased with low pH. Proteins involved in larval energy metabolism and calcification appeared to be down-regulated in response to low pH, whereas cell motility and production of cytoskeletal proteins were increased. This study on larval growth coupled with proteome change is the first step toward the search for novel Protein Expression Signatures indicative of low pH, which may help in understanding the mechanisms involved in low pH tolerance.
    Keywords: Alkalinity, total; Animalia; Aragonite saturation state; Bicarbonate ion; 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; Coast and continental shelf; Containers and aquaria (20-1000 L or 〈 1 m**2); Crassostrea hongkongensis; Figure; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Gene expression (incl. proteomics); Growth/Morphology; Growth rate; Growth rate, standard deviation; Incubation duration; Laboratory experiment; Mollusca; North Pacific; OA-ICC; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Pelagos; pH; Potentiometric; Potentiometric titration; Protein name; Protein spots, total; Protein spots, total, standard deviation; Replicates; Salinity; Shell length; Single species; Species; Spot intensity, relative; Spot intensity, relative, standard deviation; Temperature, water; Treatment; Tropical; Zooplankton
    Type: Dataset
    Format: text/tab-separated-values, 6308 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    Quantitative analysis of oyster larval proteome provides new insights into the effects of multiple climate change stressors (2016)
    PANGAEA
    In:  Supplement to: Dineshram, R; Chandramouli, K; Ko, W K Ginger; Zhang, Huoming; Qian, Pei Yuan; Ravasi, Timothy; Thiyagarajan, Vengatesen (2016): Quantitative analysis of oyster larval proteome provides new insights into the effects of multiple climate change stressors. Global Change Biology, 22(6), 2054-2068, https://doi.org/10.1111/gcb.13249
    Details
    Publication Date: 2024-03-15
    Description: The metamorphosis of planktonic larvae of the Pacific oyster (Crassostrea gigas) underpins their complex life-history strategy by switching on the molecular machinery required for sessile life and building calcite shells. Metamorphosis becomes a survival bottleneck, which will be pressured by different anthropogenically induced climate change-related variables. Therefore, it is important to understand how metamorphosing larvae interact with emerging climate change stressors. To predict how larvae might be affected in a future ocean, we examined changes in the proteome of metamorphosing larvae under multiple stressors: decreased pH (pH 7.4), increased temperature (30 °C), and reduced salinity (15 psu). Quantitative protein expression profiling using iTRAQ-LC-MS/MS identified more than 1300 proteins. Decreased pH had a negative effect on metamorphosis by down-regulating several proteins involved in energy production, metabolism, and protein synthesis. However, warming switched on these down-regulated pathways at pH 7.4. Under multiple stressors, cell signaling, energy production, growth, and developmental pathways were up-regulated, although metamorphosis was still reduced. Despite the lack of lethal effects, significant physiological responses to both individual and interacting climate change related stressors were observed at proteome level. The metamorphosing larvae of the C. gigas population in the Yellow Sea appear to have adequate phenotypic plasticity at the proteome level to survive in future coastal oceans, but with developmental and physiological costs.
    Keywords: Accession number; Alkalinity, total; Alkalinity, total, standard deviation; Animalia; Aragonite saturation state; Bicarbonate ion; 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; Coast and continental shelf; Containers and aquaria (20-1000 L or 〈 1 m**2); Crassostrea gigas; EXP; Experiment; Fold change; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Gene expression (incl. proteomics); Identification; Individuals; Jiaozhou_Bay; Laboratory experiment; Mollusca; Mortality/Survival; North Pacific; Number of expressed proteins; OA-ICC; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Pelagos; pH; pH, standard deviation; Proteins; Registration number of species; Salinity; Salinity, standard deviation; Single species; Species; Survival; Temperate; Temperature; Temperature, water; Temperature, water, standard deviation; Treatment; Type; Uniform resource locator/link to reference; Zooplankton
    Type: Dataset
    Format: text/tab-separated-values, 269779 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
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    Interactive effects of ocean acidification, elevated temperature, and reduced salinity on early-life stages of the Pacific oyster (2014)
    PANGAEA
    In:  Supplement to: Ko, W K Ginger; Dineshram, R; Campanati, Camilla; Chan, B S Vera; Havenhand, Jonathan N; Thiyagarajan, Vengatesen (2014): Interactive Effects of Ocean Acidification, Elevated Temperature, and Reduced Salinity on Early-Life Stages of the Pacific Oyster. Environmental Science & Technology, 48(17), 10079-10088, https://doi.org/10.1021/es501611u
    Details
    Publication Date: 2024-03-15
    Description: Ocean acidification (OA) effects on larvae are partially attributed for the rapidly declining oyster production in the Pacific Northwest region of the United States. This OA effect is a serious concern in SE Asia, which produces 〉80% of the world's oysters. Because climate-related stressors rarely act alone, we need to consider OA effects on oysters in combination with warming and reduced salinity. Here, the interactive effects of these three climate-related stressors on the larval growth of the Pacific oyster, Crassostrea gigas, were examined. Larvae were cultured in combinations of temperature (24 and 30 °C), pH (8.1 and 7.4), and salinity (15 psu and 25 psu) for 58 days to the early juvenile stage. Decreased pH (pH 7.4), elevated temperature (30 °C), and reduced salinity (15 psu) significantly delayed pre- and post-settlement growth. Elevated temperature lowered the larval lipid index, a proxy for physiological quality, and negated the negative effects of decreased pH on attachment and metamorphosis only in a salinity of 25 psu. The negative effects of multiple stressors on larval metamorphosis were not due to reduced size or depleted lipid reserves at the time of metamorphosis. Our results supported the hypothesis that the C. gigas larvae are vulnerable to the interactions of OA with reduced salinity and warming in Yellow Sea coastal waters now and in the future.
    Keywords: Alkalinity, total; Animalia; Aragonite saturation state; Bicarbonate ion; Calcite saturation state; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Coast and continental shelf; Containers and aquaria (20-1000 L or 〈 1 m**2); Crassostrea gigas; Development; EXP; Experiment; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Growth/Morphology; Growth rate; Laboratory experiment; Larvae; Lipid index; Mollusca; North Pacific; OA-ICC; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Pelagos; pH; Replicate; Salinity; Settlement; Single species; Species; Temperate; Temperature; Temperature, water; Treatment; Tsingdao; Zooplankton
    Type: Dataset
    Format: text/tab-separated-values, 1563 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 7
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    Analysis of Pacific oyster larval proteome and its response to high-CO2 (2012)
    PANGAEA
    In:  Supplement to: Dineshram, R; Wong, Kevin K W; Shu, Xiao; Yu, Ziniu; Qian, Pei Yuan; Thiyagarajan, Vengatesen (2012): Analysis of Pacific oyster larval proteome and its response to high-CO2. Marine Pollution Bulletin, 64(10), 2160-2167, https://doi.org/10.1016/j.marpolbul.2012.07.043
    Details
    Publication Date: 2024-03-15
    Description: Most calcifying organisms show depressed metabolic, growth and calcification rates as symptoms to high-CO(2) due to ocean acidification (OA) process. Analysis of the global expression pattern of proteins (proteome analysis) represents a powerful tool to examine these physiological symptoms at molecular level, but its applications are inadequate. To address this knowledge gap, 2-DE coupled with mass spectrophotometer was used to compare the global protein expression pattern of oyster larvae exposed to ambient and to high-CO(2). Exposure to OA resulted in marked reduction of global protein expression with a decrease or loss of 71 proteins (18% of the expressed proteins in control), indicating a wide-spread depression of metabolic genes expression in larvae reared under OA. This is, to our knowledge, the first proteome analysis that provides insights into the link between physiological suppression and protein down-regulation under OA in oyster larvae.
    Keywords: Alkalinity, total; Animalia; Aragonite saturation state; Bicarbonate ion; 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; Coast and continental shelf; Containers and aquaria (20-1000 L or 〈 1 m**2); Crassostrea gigas; Duration, number of days; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Gene expression (incl. proteomics); Growth/Morphology; Identification; Laboratory experiment; Mollusca; North Pacific; OA-ICC; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Pelagos; pH; Protein name; Replicate; Salinity; Shell length; Single species; Species; Spot intensity, relative; Temperature, water; Treatment; Tropical; Zooplankton
    Type: Dataset
    Format: text/tab-separated-values, 1861 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 8
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    Larval and post-larval stages of pacific oyster (Crassostrea gigas) are resistant to elevated CO2 (2013)
    PANGAEA
    In:  Supplement to: Ko, W K Ginger; Chan, B S Vera; Dineshram, R; Choi, K S Dennis; Li, J Adela; Yu, Ziniu; Thiyagarajan, Vengatesen (2013): Larval and Post-Larval Stages of Pacific Oyster (Crassostrea gigas) Are Resistant to Elevated CO2. PLoS ONE, 8(5), e64147, https://doi.org/10.1371/journal.pone.0064147.t001
    Details
    Publication Date: 2024-05-24
    Description: Rising anthropogenic carbon dioxide (CO2) dissolving into coastal waters is decreasing the pH and carbonate ion concentration, thereby lowering the saturation state of calcium carbonate (CaCO3) minerals through a process named ocean acidification (OA). The unprecedented threats posed by such low pH on calcifying larvae of several edible oyster species have not yet been fully explored. Effects of low pH (7.9, 7.6, 7.4) on the early growth phase of Portuguese oyster (Crassostrea angulata) veliger larvae was examined at ambient salinity (34 ppt) and the low-salinity (27 ppt) treatment. Additionally, the combined effect of pH (8.1, 7.6), salinity (24 and 34 ppt) and temperature (24 °C and 30 °C) was examined using factorial experimental design. Surprisingly, the early growth phase from hatching to 5-day-old veliger stage showed high tolerance to pH 7.9 and pH 7.6 at both 34 ppt and 27 ppt. Larval shell area was significantly smaller at pH 7.4 only in low-salinity. In the 3-factor experiment, shell area was affected by salinity and the interaction between salinity and temperature but not by other combinations. Larvae produced the largest shell at the elevated temperature in low-salinity, regardless of pH. Thus the growth of the Portuguese oyster larvae appears to be robust to near-future pH level (〉 7.6) when combined with projected elevated temperature and low-salinity in the coastal aquaculture zones of South China Sea.
    Keywords: Alkalinity, total; Alkalinity, total, standard deviation; Animalia; Aragonite saturation state; Bicarbonate ion; Biomass, ash free dry mass; Biomass, ash free dry mass, shell-free, standard deviation; 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; Coast and continental shelf; Containers and aquaria (20-1000 L or 〈 1 m**2); Crassostrea gigas; Development; EXP; Experiment; Figure; Filtering rate; Filtering rate, standard deviation; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Growth/Morphology; Growth rate; Growth rate, standard deviation; Incubation duration; Individuals; Laboratory experiment; Mollusca; North Pacific; OA-ICC; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Pelagos; Percentage; Percentage, standard deviation; pH; pH, standard deviation; Potentiometric; Potentiometric titration; Replicate; Respiration; Respiration rate, oxygen, per dry mass; Respiration rate, standard deviation; Salinity; Salinity, standard deviation; Single species; Size; Species; Stage; Temperate; Temperature; Temperature, standard deviation; Temperature, water; Treatment; Tsingdao; Zooplankton
    Type: Dataset
    Format: text/tab-separated-values, 9573 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
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