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  • GEOMAR Catalogue / E-Books  (3)
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  • 1
    Online Resource
    Online Resource
    Newark :John Wiley & Sons, Incorporated,
    Keywords: Aquatic plants - Ecophysiology. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (224 pages)
    Edition: 1st ed.
    ISBN: 9781118803448
    DDC: 572.46
    Language: English
    Note: Intro -- Photosynthesis in the Marine Environment -- Contents -- Photosynthesis in theMarine Environment -- About the authors -- Contributing authors -- Preface -- About the companion website -- Part I Plants and the Oceans -- Introduction -- Chapter 1 The evolution of photosynthetic organisms in the oceans -- Chapter 2 The different groups of marine plants -- 2.1 Cyanobacteria -- 2.2 Eukaryotic microalgae -- 2.3 Photosymbionts -- 2.4 Macroalgae -- 2.4.1 The green algae -- 2.4.2 The brown algae -- 2.4.3 The red algae -- 2.5 Seagrasses -- Chapter 3 Seawater as a medium for photosynthesis and plant growth -- 3.1 Light -- 3.2 Inorganic carbon -- 3.2.1 pH -- 3.3 Other abiotic factors -- 3.3.1 Salinity -- 3.3.2 Nutrients -- 3.3.3 Temperature -- 3.3.4 Water velocities -- Summary notes of Part I -- Part II Mechanisms of Photosynthesis, and Carbon Acquisition in Marine Plants -- Introduction to Part II -- Chapter 4 Harvesting of light in marine plants: The photosynthetic pigments -- 4.1 Chlorophylls -- 4.2 Carotenoids -- 4.3 Phycobilins -- Chapter 5 Light reactions -- 5.1 Photochemistry: excitation, de-excitation, energy transfer and primary electron transfer -- 5.2 Electron transport -- 5.3 ATP formation -- 5.4 Alternative pathways of electron flow -- Chapter 6 Photosynthetic CO2-fixation and -reduction -- 6.1 The Calvin Cycle -- 6.2 CO2-concentrating mechanisms -- Chapter 7 Acquisition of carbon in marine plants -- 7.1 Cyanobacteria and microalgae -- 7.1.1 Cyanobacteria -- 7.1.2 Eukaryotic microalgae -- 7.2 Photosymbionts -- 7.3 Macroalgae -- 7.3.1 Use of HCO3 -- 7.3.2 Mechanisms of HCO3- use -- 7.3.3 Rubisco and macroalgal photosynthesis: The need for a CO2 concentrating mechanism -- 7.4 Seagrasses -- 7.4.1 Use of HCO3- -- 7.4.2 Mechanisms of HCO3-use -- 7.5 Calcification and photosynthesis -- Summary notes of Part II. , Part III Quantitative Measurements, and Ecological Aspects, of Marine Photosynthesis -- Introduction to Part III -- Chapter 8 Quantitative measurements -- 8.1 Gas exchange -- 8.2 How to measure gas exchange -- 8.3 Pulse amplitude modulated (PAM) fluorometry -- 8.3.1 Quantum yields -- 8.3.2 Fv∕Fm -- 8.3.3 Electron transport rates -- 8.4 How to measure PAM fluorescence -- 8.4.1 Macrophytes -- 8.4.2 Microalgae -- 8.5 What method to use: Strengths and limitations -- 8.5.1 Rapid light curves -- 8.5.2 Fv∕Fm -- 8.5.3 Alpha, "uses and misuses" -- 8.5.4 Using whole plants -- Chapter 9 Photosynthetic responses, acclimations and adaptations to light -- 9.1 Responses of high and low-light plants to irradiance -- 9.2 Light responses of cyanobacteria and microalgae -- 9.3 Light effects on photosymbionts -- 9.4 Adaptations of Carbon acquisition mechanisms to light -- 9.5 Acclimations of seagrasses to high and low irradiances -- Chapter 10 Photosynthetic acclimations and adaptations to stress in the intertidal -- 10.1 Adaptations of macrophytes to desiccation -- 10.1.1 The ever-tolerant Ulva -- 10.1.2 The intertidal Fucus -- 10.1.3 The extremely tolerant Porphyra -- 10.1.4 Acclimations of seagrasses to desiccation (or not) -- 10.2 Other stresses in the intertidal -- Chapter 11 How some marine plants modify the environment for other organisms -- 11.1 Epiphytes and other 'thieves' -- 11.2 Ulva can generate its own empires -- 11.3 Seagrasses can alter environments for macroalgae and vice versa -- 11.4 Cyanobacteria and eukaryotic microalgae -- Chapter 12 Future perspectives on marine photosynthesis -- 12.1 'Harvesting' marine plant photosynthesis -- 12.2 Predictions for the future -- 12.3 Scaling of photosynthesis towards community and ecosystem production -- Summary notes of Part III -- References -- Index.
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  • 2
    Online Resource
    Online Resource
    Singapore :Springer,
    Keywords: Environmental chemistry. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (340 pages)
    Edition: 1st ed.
    ISBN: 9789811553547
    DDC: 577.14
    Language: English
    Note: Intro -- Preface -- Contents -- About the Editors -- Part I: Measurement of Environmental Parameters Affecting Marine Plankton Physiology -- Chapter 1: Characteristics of Marine Chemical Environment and the Measurements and Analyses of Seawater Carbonate Chemistry -- 1.1 Dissolved Inorganic Carbon -- 1.2 Total Alkalinity -- 1.3 pH -- 1.4 Seawater Partial Pressure of CO2 -- 1.5 Carbonate Mineral Saturation State -- 1.6 Determination of Seawater Carbonate System Parameters -- Chapter 2: Photosynthetically Active Radiation and Ultraviolet Radiation Measurements -- 2.1 Introduction -- 2.1.1 Light Intensity Measurement -- 2.1.2 Light Absorption and Extinction Coefficient -- 2.1.3 Planer and Spherical Radiometer Calibration -- References -- Part II: Plankton Culture Techniques -- Chapter 3: Manipulation of Seawater Carbonate Chemistry -- 3.1 Changes in the Carbonate Chemistry in Algal Cultures -- 3.2 Perturbation and Controlling of Seawater Carbonate Chemistry Parameters -- 3.2.1 Altering Concentration of Dissolved Inorganic Carbon -- 3.2.1.1 Controlling CO2 Partial Pressures -- 3.2.1.2 Adding CO2 Saturated Sea Water -- 3.2.1.3 Adding Strong Acid and CO32- or/and HCO3- -- 3.2.2 Changing Total Alkalinity -- 3.2.2.1 Adding Strong Acid and Alkali -- 3.2.2.2 Adding CO32- or/and HCO3- -- 3.2.2.3 Controlling Concentration of Ca2+ -- 3.3 Control of Microalgal Cell Density or Biomass -- 3.4 Analyses of Advantages and Disadvantages -- 3.5 Recommendations and Suggestions -- 3.5.1 Filtration and Sterilization -- 3.5.2 Maintain Carbonate Chemistry -- 3.5.3 Effects of Dissolved Organic Matters, Inorganic Nutrients, and Buffers on TA -- 3.5.4 The Treatment of Isotope Inorganic Carbon -- 3.5.5 Determination of Carbonate System Parameters -- 3.5.6 Measurement of pH -- References -- Chapter 4: Microalgae Continuous and Semi-continuous Cultures -- 4.1 Introduction. , 4.2 Microalgal Continuous Culture -- 4.2.1 Turbidostat -- 4.2.2 Chemostat -- 4.3 Microalgal Semicontinuous Culture -- 4.4 The Specific Growth Rates Calculation -- 4.4.1 Batch Culture -- 4.4.2 Semicontinuous Culture -- 4.4.3 Continuous Culture -- 4.5 Relative Merits and Optimization Recommendations -- 4.5.1 Relative Merits of Continuous Culture -- 4.5.2 The Advantages and Disadvantages of Microalgae Semicontinuous Cultures -- 4.5.3 Details in Culture Optimizing -- References -- Chapter 5: Culturing Techniques for Planktonic Copepods -- 5.1 Introduction -- 5.2 Copepod Culturing Methods -- 5.3 Procedures for Copepod Culture -- 5.3.1 Provenance Copepod Collection -- 5.3.2 Copepod Isolation, Purification and Culture -- 5.3.3 Feeding Food -- 5.3.4 Water Quality Control of Culture Medium -- 5.3.5 Harvesting -- 5.4 The Advantages and Disadvantages of Different Culture Methods and Points for Attention -- References -- Part III: Determination of Key Enzymes in Primary Producers -- Chapter 6: Carbonic Anhydrase -- 6.1 Introduction -- 6.2 Immunochemical Quantitative Analysis of Carbonic Anhydrase -- 6.2.1 Preparation of a Protein Sample of Carbonic Anhydrase -- 6.2.2 Separation of Proteins by Electrophoresis (Bailly and Coleman 1988 -- Zhao 2008) -- 6.2.2.1 Sample Treatment -- 6.2.2.2 Loading Sample and Electrophoresis -- 6.2.3 Transfer Proteins to Membrane -- 6.2.4 Blocking -- 6.2.5 Primary Antibody Incubation -- 6.2.6 Secondary Antibody Incubation -- 6.2.7 Protein Detection -- 6.3 Determination of Activity of Carbonic Anhydrase (Willbur and Anderson 1948 -- Xia and Huang 2010) -- 6.3.1 Measurement of Extracellular CA -- 6.3.2 Measurement of Intracellular CA -- 6.3.3 Advantage and Disadvantage -- References -- Chapter 7: Rubisco -- 7.1 Introduction -- 7.2 Experimental Materials and Methods -- 7.2.1 Protein Extraction. , 7.2.1.1 Extraction of Denatured Total Protein -- Materials, Reagents, Instruments and Experimental Methods -- 7.2.1.2 Extraction of Soluble Native Protein -- Materials, Reagents, Instruments, and Experimental Methods -- 7.2.2 Quantification of Rubisco -- 7.2.2.1 Rubisco Quantification Using Immunochemical Methods -- Materials, Reagents, Instruments, and Experimental Methods -- 7.2.2.2 Quantitative Rubisco Using 14C-CABP (2-Carboxy-d-arabinitol-1,5-bisphosphate) -- Materials, Reagents, Instruments, and Experimental Methods -- 7.2.3 Detection of Rubisco Activity -- 7.2.3.1 Detection of Rubisco Enzyme Activity Using NaH14CO3 -- Materials, Reagents, Instruments, and Experimental Methods -- 7.2.3.2 Enzyme-Linked Method of Detection of Rubisco Enzyme Activity -- Materials, Reagents, Instruments, and Experimental Methods -- 7.3 Advantages, Disadvantages, and Misunderstanding -- References -- Chapter 8: Phosphoenolpyruvate Carboxylase -- 8.1 PEPC and C4 Pathway -- 8.2 Preparation and Assay of PEPC -- 8.2.1 Preparation of Reagents -- 8.2.2 Preparation of Cell Extract -- 8.2.3 Procedure -- 8.2.4 14C Isotope Assay Methods -- 8.3 Note -- References -- Chapter 9: Nitrate Reductase -- 9.1 Introduction -- 9.2 Materials and Method -- 9.2.1 Materials -- 9.2.2 Reagent Preparation -- 9.2.3 Methods -- 9.3 Discussion -- References -- Chapter 10: Antioxidants and Reactive Oxygen Species (ROS) Scavenging Enzymes -- 10.1 Introduction -- 10.2 Superoxide Dismutase (SOD) Activity -- 10.2.1 Materials -- 10.2.2 Reagent Preparation -- 10.2.3 Methods -- 10.3 Catalase (CAT) Activity -- 10.3.1 Materials -- 10.3.2 Reagent Preparation -- 10.3.3 Methods -- 10.4 Peroxidase (POD) Activity -- 10.4.1 Materials -- 10.4.2 Reagent Preparation -- 10.4.3 Methods -- 10.5 Ascorbate Peroxidase (APX) Activity -- 10.5.1 Materials -- 10.5.2 Reagent Preparation -- 10.5.3 Methods. , 10.6 Glutathione Reductase (GR) Activity -- 10.6.1 Methods -- 10.7 Discussion -- References -- Part IV: Measurements and Analyses of Pigments -- Chapter 11: Chlorophylls -- 11.1 Distribution, Structure, and Spectral Characteristics of Chlorophylls -- 11.2 Quantitative Analysis of Chlorophyll -- 11.2.1 Spectrophotometry -- 11.2.2 High Performance Liquid Chromatography (HPLC) -- 11.3 The Advantages and Disadvantages of These Methods -- References -- Chapter 12: Phycobiliproteins -- 12.1 Quantitative Analysis of Phycobiliprotein -- 12.2 Isolation and Purification of Phycobiliprotein -- 12.3 Advantages and Disadvantages of Extraction Methods -- References -- Chapter 13: Carotenoids -- 13.1 Distribution of Carotenoids in the Algal Class -- 13.2 Carotenoid Analysis by HPLC -- 13.3 Quantification of Total Carotenoids -- 13.4 Note -- References -- Chapter 14: Phenolic Compounds and Other UV-Absorbing Compounds -- 14.1 Introduction -- 14.2 Determination of Phenolic Compounds -- 14.2.1 Spectrophotometer -- 14.2.2 HPLC -- 14.2.2.1 Preparation of Microalgae Extracts for Isolation and Quantification of Phenolic Compounds -- 14.2.2.2 Solid-Phase Extraction -- 14.2.2.3 Quantification of the Phenolic Compounds -- 14.2.3 Strengths and Limitations -- 14.3 Determination of UV-Absorbing Compounds -- 14.3.1 Extraction of Samples for HPLC Analysis of Mycosporine Amino Acids -- 14.3.2 HPLC Analysis -- References -- Part V: Measurements and Analyses of Photosynthesis and Respiration -- Chapter 15: Photosynthetic Oxygen Evolution -- 15.1 Instruments and Equipment -- 15.2 Solution Preparation -- 15.3 Operation Procedures -- 15.3.1 Installation of the Liquid Oxygen Electrode -- 15.3.2 Calibration of the Liquid Oxygen Electrode -- 15.3.3 Determination of Dissolved Oxygen -- 15.3.4 Calculation of Oxygen Evolution/Oxygen Consumption Rate of Samples. , 15.4 The Advantages, Disadvantages, and Considerations -- References -- Chapter 16: Photosynthetic Carbon Fixation -- 16.1 Introduction -- 16.2 14C Isotope Tracer Method -- 16.2.1 Sampling Protocols -- 16.2.2 14C Inoculation and Incubation -- 16.2.3 14C Collection, Treatment, and Measurement -- 16.3 Matters Needing Attention -- 16.3.1 Volume of Incubation Flask -- 16.3.2 Amount of 14C Addition -- 16.3.3 Incubation Time -- 16.4 Advantages and Disadvantages of the 14C Method -- 16.5 Application of the 14C Method in the Laboratory -- References -- Chapter 17: Photorespiration and Dark Respiration -- 17.1 Introduction -- 17.2 Materials and Methods -- 17.2.1 Algal Materials -- 17.2.2 Instruments -- 17.2.3 Method -- References -- Chapter 18: Carbon Dioxide vs. Bicarbonate Utilisation -- 18.1 Introduction -- 18.2 Methodology -- 18.2.1 Isotope Disequilibria -- 18.2.2 pH Dependence of K0.5 Values -- 18.2.3 Photosynthetic Rates at Different pH Values -- 18.2.3.1 Kinetics of O2 Evolution vs. Uncatalyzed CO2 Supply from HCO3- -- 18.2.3.2 MIMS -- 18.3 Merits and Demerits -- References -- Chapter 19: Action Spectra of Photosynthetic Carbon Fixation -- 19.1 Introduction -- 19.2 Action Spectrum of Visible Light -- 19.2.1 Absorption Spectrum of Pigment -- 19.2.2 Production of Action Spectrum -- 19.3 Biological Weighting Function of UV Radiation -- 19.3.1 Sample Collection -- 19.3.2 Solar Radiation Monitoring -- 19.3.3 Ultraviolet Radiation Treatment -- 19.3.4 Determination of Photosynthetic Carbon Fixation Rate -- 19.3.5 Calculation of BWF -- 19.3.5.1 Photosynthetic Carbon Fixation of Phytoplankton -- 19.3.5.2 UV Intensity Between Filters -- 19.3.5.3 Calculation of Biological Weight -- 19.4 Advantages and Disadvantages -- References -- Chapter 20: Determination of the Inorganic Carbon Affinity and CO2 Concentrating Mechanisms of Algae -- 20.1 Introduction. , 20.2 Determination of Inorganic Carbon Affinity.
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  • 3
    Online Resource
    Online Resource
    Cham : Springer
    Keywords: Microalgae Biotechnology ; Microalgae Cultures and culture media
    Description / Table of Contents: This book covers the state-of-the-art of microalgae physiology and biochemistry (and the several -omics). It serves as a key reference work for those working with microalgae, whether in the lab, the field, or for commercial applications. It is aimed at new entrants into the field (i.e. PhD students) as well as experienced practitioners. It has been over 40 years since the publication of a book on algal physiology. Apart from reviews and chapters no other comprehensive book on this topic has been published. Research on microalgae has expanded enormously since then, as has the commercial exploitation of microalgae. This volume thoroughly deals with the most critical physiological and biochemical processes governing algal growth and production
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource
    Edition: Online-Ausg.
    Series Statement: Developments in applied phycology 6
    Language: English
    Note: Includes bibliographical references
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  • 4
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    PANGAEA
    In:  Supplement to: Wu, Yaping; Yue, Furong; Xu, Juntian; Beardall, John (2017): Differential photosynthetic responses of marine planktonic and benthic diatoms to ultraviolet radiation under various temperature regimes. Biogeosciences, 14(22), 5029-5037, https://doi.org/10.5194/bg-14-5029-2017
    Publication Date: 2023-01-13
    Description: We studied the photophysiological response to ultraviolet radiation (UVR) of two diatoms, isolated from different environmental niches. Both species showed the highest sensitivity to UV radiation under relatively low temperature, while they were less inhibited under moderately increased temperature. Under the highest temperature applied in this study, the benthic diatom Nitzschia sp. showed minimal sensitivity to UV radiation, while inhibition of the planktonic species, Skeletonema sp., increased further compared with that at the growth temperature. These photochemical responses were linked to values for the repair and damage processes within the cell; higher damage rates and lower repair rates were observed for Skeletonema sp. under suboptimal temperature, while for Nitzschia sp., repair rates increased and damage rates were stable within the applied temperature range. Our results suggested that the response of phytoplankton to UV radiation correlated with their niche environments, the periodic exposure to extreme temperature promote the resistance of benthic species to the combination of high temperature and UV radiation. Furthermore, the temperature-mediated UV sensitivities might also have implications for phytoplankton in the future warming oceans.
    Keywords: File format; File name; File size; Uniform resource locator/link to file
    Type: Dataset
    Format: text/tab-separated-values, 32 data points
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  • 5
    Publication Date: 2024-03-15
    Description: Experimentally elevated pCO2 and the associated pH drop are known to differentially affect many aspects of the physiology of diatoms under different environmental conditions or in different regions. However, contrasting responses to elevated pCO2 in the dark and light periods of a diel cycle have not been documented. By growing the model diatom Phaeodactylum tricornutum under 3 light levels and 2 different CO2 concentrations, we found that the elevated pCO2/pH drop projected for future ocean acidification reduced the diatom's growth rate by 8–25% during the night period but increased it by up to 9–21% in the light period, resulting in insignificant changes in growth over the diel cycle under the three different light levels. The elevated pCO2 increased the respiration rates irrespective of growth light levels and light or dark periods and enhanced its photosynthetic performance during daytime. With prolonged exposure to complete darkness, simulating the sinking process in the dark zones of the ocean, the growth rates decreased faster under elevated pCO2, along with a faster decline in quantum yield and cell size. Our results suggest that elevated pCO2 enhances the diatom's respiratory energy supplies to cope with acidic stress during the night period but enhances its death rate when the cells sink to dark regions of the oceans below the photic zone, with implications for a possible acidification-induced reduction in vertical transport of organic carbon.
    Keywords: Alkalinity, total; Alkalinity, total, standard deviation; Aragonite saturation state; Bicarbonate ion; Bicarbonate ion, standard deviation; 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 deviation; Carbonate ion; Carbonate ion, standard deviation; Carbonate system computation flag; Carbon dioxide; Carbon dioxide, standard deviation; Carotenoids, standard deviation; Carotenoids/Chlorophyll a ratio; Carotenoids/Chlorophyll a ratio, standard deviation; Carotenoids per cell; Cell, diameter; Cell, diameter, standard deviation; Chlorophyll a, standard deviation; Chlorophyll a per cell; Chromista; Effective photochemical quantum yield; Effective photochemical quantum yield, standard deviation; Electron transport rate, relative; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Growth/Morphology; Growth rate; Laboratory experiment; Laboratory strains; Light; Light mode; Maximum quantum yield of photosystem II; Maximum quantum yield of photosystem II, standard deviation; Net photosynthesis rate, oxygen, per cell; Net photosynthesis rate, standard deviation; Not applicable; OA-ICC; Ocean Acidification International Coordination Centre; Ochrophyta; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Pelagos; pH; pH, standard deviation; Phaeodactylum tricornutum; Phytoplankton; Primary production/Photosynthesis; Ratio; Ratio, standard deviation; Registration number of species; Respiration; Respiration rate, oxygen, per cell; Respiration rate, oxygen, standard deviation; Salinity; Single species; Species; Temperature, water; Time in hours; Treatment; Type; Uniform resource locator/link to reference
    Type: Dataset
    Format: text/tab-separated-values, 3030 data points
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  • 6
    Publication Date: 2024-03-15
    Description: While intertidal macroalgae are exposed to drastic changes in solar photosynthetically active radiation (PAR) and ultraviolet radiation (UVR) during a diel cycle, and to ocean acidification (OA) associated with increasing CO2 levels, little is known about their photosynthetic performance under the combined influences of these drivers. In this work, we examined the photoprotective strategies controlling electron flow through photosystems II (PSII) and photosystem I (PSI) in response to solar radiation with or without UVR and an elevated CO2 concentration in the intertidal, commercially important, red macroalgae Pyropia (previously Porphyra) yezoensis. By using chlorophyll fluorescence techniques, we found that high levels of PAR alone induced photoinhibition of the inter-photosystem electron transport carriers, as evidenced by the increase of chlorophyll fluorescence in both the J- and I-steps of Kautsky curves. In the presence of UVR, photoinduced inhibition was mainly identified in the O2-evolving complex (OEC) and PSII, as evidenced by a significant increase in the variable fluorescence at the K-step (Fk) of Kautsky curves relative to the amplitude of FJ−Fo (Wk) and a decrease of the maximum quantum yield of PSII (Fv/Fm). Such inhibition appeared to ameliorate the function of downstream electron acceptors, protecting PSI from over-reduction. In turn, the stable PSI activity increased the efficiency of cyclic electron transport (CET) around PSI, dissipating excess energy and supplying ATP for CO2 assimilation. When the algal thalli were grown under increased CO2 and OA conditions, the CET activity became further enhanced, which maintained the OEC stability and thus markedly alleviating the UVR-induced photoinhibition. In conclusion, the well-established coordination between PSII and PSI endows P. yezoensis with a highly efficient photochemical performance in response to UVR, especially under the scenario of future increased CO2 levels and OA.
    Keywords: Activity of cyclic electron transport around Photosystem I; Activity of cyclic electron transport around Photosystem I, standard deviation; Alkalinity, total; Alkalinity, total, standard deviation; Aragonite saturation state; Benthos; Bicarbonate ion; Bicarbonate ion, standard deviation; 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 deviation; Carbonate ion; Carbonate ion, standard deviation; Carbonate system computation flag; Carbon dioxide; Carbon dioxide, standard deviation; Coast and continental shelf; Effective quantum yield; Effective quantum yield, standard deviation; EXP; Experiment; Experiment duration; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Gaogong_Island_OA; Laboratory experiment; Light; Macroalgae; North Pacific; OA-ICC; Ocean Acidification International Coordination Centre; Oxygen evolving complex activity; Oxygen evolving complex activity, standard deviation; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH; pH, standard deviation; Photochemical quantum yield; Photochemical quantum yield, standard deviation; Photosystem I donor side activity; Photosystem I donor side activity, standard deviation; Photosystem II acceptor side activity; Photosystem II acceptor side activity, standard deviation; Plantae; Potentiometric; Potentiometric titration; Primary production/Photosynthesis; Pyropia yezoensis; Quantum yield for reduction of Photosystem I acceptor side; Quantum yield for reduction of Photosystem I acceptor side, standard deviation; Quantum yield of electron transport; Quantum yield of electron transport, standard deviation; Registration number of species; Rhodophyta; Salinity; Single species; Species; Temperate; Temperature, water; Temperature, water, standard deviation; Treatment; Type; Uniform resource locator/link to reference
    Type: Dataset
    Format: text/tab-separated-values, 276 data points
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  • 7
    Publication Date: 2024-03-15
    Description: The carbonate chemistry in coastal waters is more variable compared with that of open oceans, both in magnitude and time scale of its fluctuations. However, knowledge of the responses of coastal phytoplankton to dynamic changes in pH/pCO2 has been scarcely documented. Hence, we investigated the physiological performance of a coastal isolate of the coccolithophore Emiliania huxleyi (PML B92/11) under fluctuating and stable pCO2 regimes (steady ambient pCO2, 400 μatm; steady elevated pCO2, 1200 μatm; diurnally fluctuating elevated pCO2, 600–1800 μatm). Elevated pCO2 inhibited the calcification rate in both the steady and fluctuating regimes. However, higher specific growth rates and lower ratios of calcification to photosynthesis were detected in the cells grown under diurnally fluctuating elevated pCO2 conditions. The fluctuating pCO2 regime alleviated the negative effects of elevated pCO2 on effective photochemical quantum yield and relative photosynthetic electron transport rate compared with the steady elevated pCO2 treatment. Our results suggest that growth of E. huxleyi could benefit from diel fluctuations of pH/pCO2 under future-projected ocean acidification, but its calcification was reduced by the fluctuation and the increased concentration of CO2, reflecting a necessity to consider the influences of dynamic pH fluctuations on coastal carbon cycles associated with ocean global changes.
    Keywords: Alkalinity, total; Alkalinity, total, standard deviation; Aragonite saturation state; Bicarbonate ion; Bottles or small containers/Aquaria (〈20 L); Calcification/Dissolution; Calcification rate, standard deviation; Calcification rate of carbon per cell; Calcite saturation state; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Cell size; Cell size, standard deviation; Chromista; Effective photochemical quantum yield; Effective photochemical quantum yield, standard deviation; Electron transport rate, relative; Electron transport rate, relative, standard deviation; Emiliania huxleyi; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Growth/Morphology; Growth rate; Growth rate, standard deviation; Haptophyta; Irradiance; Laboratory experiment; Laboratory strains; Maximum photochemical quantum yield of photosystem II; Maximum photochemical quantum yield of photosystem II, standard deviation; Net photosynthesis rate, per cell; Net photosynthesis rate, standard deviation; Not applicable; OA-ICC; Ocean Acidification International Coordination Centre; Other; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Pelagos; pH; pH, standard deviation; Photosynthesis rate, carbon, per cell; Phytoplankton; Primary production/Photosynthesis; Registration number of species; Salinity; Single species; Species; Temperature, water; Time in hours; Treatment; Type; Uniform resource locator/link to reference
    Type: Dataset
    Format: text/tab-separated-values, 2758 data points
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  • 8
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    PANGAEA
    In:  Supplement to: Jin, Peng; Wang, Tifeng; Liu, Nana; Dupont, Sam; Beardall, John; Boyd, Philip W; Riebesell, Ulf; Gao, Kunshan (2015): Ocean acidification increases the accumulation of toxic phenolic compounds across trophic levels. Nature Communications, 6, 8714, https://doi.org/10.1038/ncomms9714
    Publication Date: 2024-03-15
    Description: Increasing atmospheric CO2 concentrations are causing ocean acidification (OA), altering carbonate chemistry with consequences for marine organisms. Here we show that OA increases by 46-212% the production of phenolic compounds in phytoplankton grown under the elevated CO2 concentrations projected for the end of this century, compared with the ambient CO2 level. At the same time, mitochondrial respiration rate is enhanced under elevated CO2 concentrations by 130-160% in a single species or mixed phytoplankton assemblage. When fed with phytoplankton cells grown under OA, zooplankton assemblages have significantly higher phenolic compound content, by about 28-48%. The functional consequences of the increased accumulation of toxic phenolic compounds in primary and secondary producers have the potential to have profound consequences for marine ecosystem and seafood quality, with the possibility that fishery industries could be influenced as a result of progressive ocean changes.
    Keywords: Alkalinity, total; 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; Chromista; Emiliania huxleyi; EXP; Experiment; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Haptophyta; Immunology/Self-protection; Laboratory experiment; Laboratory strains; Mesocosm or benthocosm; North Pacific; OA-ICC; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Pelagos; pH; Phenolics, all; Phenolics, all, per individual; Phytoplankton; Potentiometric; Registration number of species; Replicate; Respiration; Respiration rate, oxygen, per cell; Salinity; Single species; Species; Temperature, water; Treatment; Type; Uniform resource locator/link to reference; Wuyuan_Bay
    Type: Dataset
    Format: text/tab-separated-values, 1434 data points
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  • 9
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    PANGAEA
    In:  Supplement to: Liu, Nana; Beardall, John; Gao, Kunshan (2017): Elevated CO2 and associated seawater chemistry do not benefit a model diatom grown with increased availability of light. Aquatic Microbial Ecology, 79(2), 137-147, https://doi.org/10.3354/ame01820
    Publication Date: 2024-03-15
    Description: Elevated CO2 is leading to a decrease in pH in marine environments (ocean acidification [OA]), altering marine carbonate chemistry. OA can influence the metabolism of many marine organisms; however, no consensus has been reached on its effects on algal photosynthetic carbon fixation and primary production. Here, we found that when the diatom Phaeodactylum tricornutum was grown under different pCO2 levels, it showed different responses to elevated pCO2 levels under growth-limiting (20 µmol photons/m**2/s, LL) compared with growth-saturating (200 µmol photons/m**2/s, HL) light levels. With pCO2 increased up to 950 µatm, growth rates and primary productivity increased, but in the HL cells, these parameters decreased significantly at higher concentrations up to 5000 µatm, while no difference in growth was observed with pCO2 for the LL cells. Elevated CO2 concentrations reduced the size of the intracellular dissolved inorganic carbon (DIC) pool by 81% and 60% under the LL and HL levels, respectively, with the corresponding photosynthetic affinity for DIC decreasing by 48% and 55%. Little photoinhibition was observed across all treatments. These results suggest that the decreased growth rates under higher CO2 levels in the HL cells were most likely due to acid stress. Low energy demand of growth and energy saving from the down-regulation of the CO2 concentrating mechanisms (CCM) minimized the effects of acid stress on the growth of the LL cells. These findings imply that OA treatment, except for down-regulating CCM, caused stress on the diatom, reflected in diminished C assimilation and growth rates.
    Keywords: Alkalinity, total; Aragonite saturation state; 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; Carbon, inorganic, dissolved, intracellular pool; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Chromista; Cumulative carbon fixation per cell; Effective quantum yield; Factor; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Growth/Morphology; Growth rate; Identification; Initial slope of photosynthesis/dissolved inorganic carbon; Laboratory experiment; Laboratory strains; Light; Light capturing capacity; Light saturated maximum photosynthetic rate per cell; Light saturation point; Maximal electron transport rate, relative; Maximum photochemical quantum yield of photosystem II; Not applicable; OA-ICC; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Pelagos; pH; Phaeodactylum tricornutum; Phytoplankton; Primary production/Photosynthesis; Registration number of species; Salinity; Single species; Species; Temperature, water; Time in seconds; Treatment; Type; Uniform resource locator/link to reference
    Type: Dataset
    Format: text/tab-separated-values, 6177 data points
    Location Call Number Limitation Availability
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  • 10
    Publication Date: 2024-03-15
    Description: Red tide and green tide are two common algal blooms that frequently occur in many areas in the global oceans. The algae causing red tide and green tide often interact with each other in costal ecosystems. However, little is known on how future CO2-induced ocean acidification combined with temperature variation would affect the interaction of red and green tides. In this study, we cultured the red tide alga Skeletonema costatum and the green tide alga Ulva linza under ambient (400 ppm) and future CO2 (1000 ppm) levels and three temperatures (12, 18, 24 °C) in both monoculture and coculture systems. Coculture did not affect the growth rate of U. linza but significantly decreased it for S. costatum. Elevated CO2 relieved the inhibitory effect of U. linza on the growth of S. costatum, particularly for higher temperatures. At elevated CO2, higher temperature increased the growth rate of S. costatum but reduced it for U. linza. Coculture with U. linza reduced the net photosynthetic rate of S. costatum, which was relieved by elevated CO2. This pattern was also found in Chl a content, indicating that U. linza may inhibit growth of S. costatum via harming pigment synthesis and thus photosynthesis. In monoculture, higher temperature did not affect respiration rate of S. costatum but increased it in U. linza. Coculture did not affect respiration of U. linza but stimulated it for S. costatum, which was a signal of responding to biotic and/abiotic stress. The increased growth of S. costatum at higher temperature and decreased inhibition of U. linza on S. costatum at elevated CO2 suggest that red tides may have more advantages over green tides in future warmer and CO2-enriched oceans.
    Keywords: Alkalinity, total; Alkalinity, total, standard deviation; Aragonite saturation state; Benthos; Bicarbonate ion; Bicarbonate ion, standard deviation; 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 deviation; Carbonate ion; Carbonate ion, standard deviation; Carbonate system computation flag; Carbon dioxide; Carbon dioxide, standard deviation; Chlorophyll a, standard deviation; Chlorophyll a per cell; Chlorophyta; Chromista; Coast and continental shelf; EXP; Experiment; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Growth/Morphology; Growth rate; Growth rate, standard deviation; Jiangsu_province; Laboratory experiment; Macroalgae; Net photosynthesis rate, oxygen, per cell; Net photosynthesis rate, standard deviation; North Pacific; OA-ICC; Ocean Acidification International Coordination Centre; Ochrophyta; Partial pressure of carbon dioxide, standard deviation; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Pelagos; pH; pH, standard deviation; Phytoplankton; Plantae; Potentiometric; Potentiometric titration; Primary production/Photosynthesis; Registration number of species; Respiration; Respiration rate, oxygen, per cell; Respiration rate, oxygen, standard deviation; Salinity; Skeletonema costatum; Species; Species interaction; Temperate; Temperature; Temperature, water; Treatment; Type; Ulva linza; Uniform resource locator/link to reference
    Type: Dataset
    Format: text/tab-separated-values, 960 data points
    Location Call Number Limitation Availability
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