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  • 1
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    Dealing with the effects of ocean acidification on coral reefs in the Indian Ocean and Asia (2019)
    Elsevier
    In:  Regional Studies in Marine Science, 28 . pp. 1-10.
    Details
    Publication Date: 2020-01-02
    Description: Shallow coral reefs provide food, income, well-being and coastal protection to countries around the Indian Ocean and Asia. These reefs are under threat due to many anthropogenic stressors including pollution, sedimentation, overfishing, sea surface warming and habitat destruction. Ocean acidification interacts with these factors to exacerbate stress on coral reefs. Effective solutions in tackling the impact of ocean acidification require a thorough understanding of the current adaptive capacity of each nation to deal with the consequences. Here, we aim to help the decision-making process for policy makers in dealing with these future challenges at the regional and national levels. We recommend that a series of evaluations be made to understand the current status of each nation in this region in dealing with ocean acidification impacts by assessing the climate policy, education, policy coherence, related research activities, adaptive capacity of reef-dependent economic sectors and local management. Indonesia and Thailand, are selected as case studies. We also highlight general recommendations on mitigation and adaptation to ocean acidification impacts on coral reefs and propose well-designed research program would be necessary for developing a more targeted policy agenda in this region.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1016/j.rsma.2019.100560
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 2
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    Exploring New Frontiers in Marine Radioisotope Tracing – Adapting to New Opportunities and Challenges (2020)
    In:  EPIC3Frontiers in Marine Science, 7, ISSN: 2296-7745
    Details
    Publication Date: 2021-05-11
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Format: application/pdf
    Location Call Number Limitation Availability
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    PAPER (OA)
  • 3
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    Exploring new frontiers in marine radioisotope tracing - adapting to new opportunities and challenges (2020)
    Frontiers Media
    Details
    Publication Date: 2022-10-26
    Description: © The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Cresswell, T., Metian, M., Fisher, N. S., Charmasson, S., Hansman, R. L., Bam, W., Bock, C., & Swarzenski, P. W. Exploring new frontiers in marine radioisotope tracing - adapting to new opportunities and challenges. Frontiers in Marine Science, 7, (2020): 406, doi:10.3389/fmars.2020.00406.
    Description: Radioisotopes have been used in earth and environmental sciences for over 150 years and provide unique tools to study environmental processes in great detail from a cellular level through to an oceanic basin scale. These nuclear techniques have been employed to understand coastal and marine ecosystems via laboratory and field studies in terms of how aquatic organisms respond to environmental stressors, including temperature, pH, nutrients, metals, organic anthropogenic contaminants, and biological toxins. Global marine issues, such as ocean warming, deoxygenation, plastic pollution, ocean acidification, increased duration, and intensity of toxic harmful algal blooms (HABs), and coastal contamination are all impacting marine environments, thereby imposing various environmental and economic risks. Being able to reliably assess the condition of coastal and marine ecosystems, and how they may respond to future disturbances, can provide vital information for society in the sustainable management of their marine environments. This paper summarizes the historical use of radiotracers in these systems, describes how existing techniques of radioecological tracing can be developed for specific current environmental issues and provides information on emerging issues that would benefit from current and new radiotracer methods. Current challenges with using radioecological tracers and opportunities are highlighted, as well as opportunities to maximize the application of these methods to greatly increase the ability of environmental managers to conduct evidence-based management of coastal and marine ecosystems.
    Description: The IAEA is grateful for the support provided to its Environment Laboratories by the Government of the Principality of Monaco. This contribution was made within the framework of the IAEA CRP on “Applied radioecological tracers to assess coastal and marine ecosystem health” (K41019).
    Keywords: Radionuclides ; Radiotracers ; Radioecology ; Ecosystem condition ; Marine ; Coastal
    Repository Name: Woods Hole Open Access Server
    Type: Article
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    PAPER (OA)
  • 4
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    Limited effects of increased CO2 and temperature on metal and radionuclide bioaccumulation in a sessile invertebrate, the oyster Crassostrea gigas (2016)
    PANGAEA
    In:  Supplement to: Belivermis, Murat; Warnau, Michel; Metian, Marc; Oberhänsli, F; Teyssié, Jean-Louis; Lacoue-Labarthe, Thomas (2016): Limited effects of increased CO2 and temperature on metal and radionuclide bioaccumulation in a sessile invertebrate, the oyster Crassostrea gigas. ICES Journal of Marine Science, 73(3), 753-763, https://doi.org/10.1093/icesjms/fsv236
    Details
    Publication Date: 2024-03-15
    Description: This study investigated the combined effects of reduced pH and increased temperature on the capacities of the Pacific cupped oyster Crassostrea gigas to bioconcentrate radionuclide and metals. Oysters were exposed to dissolved radiotracers (110mAg, 241Am, 109Cd,57Co,54Mn, and 65Zn) at three pH (7.5, 7.8, 8.1) and two temperatures (21 and 24°C) under controlled laboratory conditions. Although calcifying organisms are recognized as particularly vulnerable to ocean acidification, the oyster did not accumulate differently the studied metals when exposed under the different pH conditions. However, temperature alone or in combination with pH somewhat altered the bioaccumulation of the studied elements. At pH 7.5, Cd was accumulated with an uptake rate constant twofold higher at 24°C than 21°C. Bioaccumulation of Mn was significantly affected by an interactive effect between seawater pH and temperature, with a decreased uptake rate at pH 7.5 when temperature increased (27 ± 1 vs. 17 ± 1 /day at 21 and 24°C, respectively). Retention of Co and Mn tended also to decrease at the same pH with decreasing temperature. Neither pH nor temperature affected strongly the elements distribution between shell and soft tissues. Significant effects of pH were found on the bioaccessibility of Mn, Zn, and 241Am during experimental in vitro simulation of human digestion.
    Keywords: Activity; Activity, standard deviation; Alkalinity, total; Americium-241, activity, normalized; Americium-241, concentration factors; Americium-241, standard deviation; Americium-241 activity per mass; Animalia; Aragonite saturation state; Benthic animals; Benthos; Bicarbonate ion; Biomass/Abundance/Elemental composition; Cadmium-109, activity; Cadmium-109, activity, normalized; Cadmium-109, activity, normalized, standard deviation; Cadmium-109, concentration factors; Caesium-134, activity, normalized; Caesium-134, concentration factors; Caesium-134 activity per mass; Calcite saturation state; Calculated using seacarb; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Coast and continental shelf; Cobalt-57, activity; Cobalt-57, activity, normalized; Cobalt-57, activity, normalized, standard deviation; Cobalt-57, concentration factors; Containers and aquaria (20-1000 L or 〈 1 m**2); Crassostrea gigas; Date; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Growth/Morphology; Identification; Laboratory experiment; Manganese-54, activity; Manganese-54, activity, normalized; Manganese-54, activity, normalized, standard deviation; Manganese-54, concentration factors; Mollusca; North Atlantic; OA-ICC; Ocean Acidification International Coordination Centre; 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; Position; Potentiometric; Registration number of species; Replicate; Salinity; Sampling date; Silver-110m, activity; Silver-110m, activity, normalized; Silver-110m, activity, normalized, standard deviation; Silver-110m, concentration factors; Single species; Species; Temperate; Temperature; Temperature, water; Temperature, water, standard deviation; Time in days; Treatment; Type; Uniform resource locator/link to reference; Wet mass; Zinc-65, activity; Zinc-65, activity, normalized; Zinc-65, activity, normalized, standard deviation; Zinc-65, concentration factors
    Type: Dataset
    Format: text/tab-separated-values, 81131 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    Seawater carbonate chemistry and coral calcification (2020)
    PANGAEA
    Details
    Publication Date: 2024-03-15
    Description: Coral reefs are constructed by calcifiers that precipitate calcium carbonate to build their shells or skeletons through the process of calcification. Accurately assessing coral calcification rates is crucial to determine the health of these ecosystems and their response to major environmental changes such as ocean warming and acidification. Several approaches have been used to assess rates of coral calcification but there is a real need to compare these approaches in order to ascertain that high quality and intercomparable results can be produced. Here, we assessed four methods (total alkalinity anomaly, calcium anomaly, 45Ca incorporation and 13C incorporation) to determine coral calcification of the reef-building coral Stylophora pistillata. Given the importance of environmental conditions on this process, the study was performed under two pH (ambient and low level) and two light (light and dark) conditions. Under all conditions, calcification rates estimated using the alkalinity and calcium anomaly techniques as well as 45Ca incorporation were highly correlated. Such a strong correlation between the alkalinity anomaly and 45Ca incorporation techniques has not been observed in previous studies and most probably results from improvements described in the present paper. The only method which provided calcification rates significantly different from the other three techniques was 13C incorporation. Calcification rates based on this method were consistently higher than those measured using the other techniques. Although reasons for these discrepancies remain unclear, the use of this technique for assessing calcification rates in corals is not recommended without further investigations.
    Keywords: Alkalinity, total; Alkalinity, total, standard deviation; Animalia; Aragonite saturation state; Aragonite saturation state, standard deviation; Benthic animals; Bicarbonate ion; Bicarbonate ion, standard deviation; Bottles or small containers/Aquaria (〈20 L); Calcification/Dissolution; Calcification rate, standard error; Calcification rate of calcium carbonate; Calcite saturation state; Calcite saturation state, standard deviation; Calcium; Calcium-45 activity; Calcium-45 activity, standard deviation; Calcium ion, standard deviation; 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; Date/time end; Date/time start; Dry mass; Experiment; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Fugacity of carbon dioxide in seawater, standard deviation; Identification; Incubation duration; Laboratory experiment; Laboratory strains; Light; Mass; Not applicable; 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; Potentiometric; Potentiometric titration; Registration number of species; Salinity; Single species; Size; Species; Stylophora pistillata; Temperature, water; Temperature, water, standard deviation; Treatment; Type; Uniform resource locator/link to reference; δ13C; δ13C, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 2610 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
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    Seawater carbonate chemistry and tissue necrosis, photosynthetic efficiency and colour index of seven coral species (2021)
    PANGAEA
    Details
    Publication Date: 2024-03-15
    Description: Responses of corals to seawater acidification have been extensively studied. Sensitivity varies widely between species, highlighting the need to avoid extrapolation from one to another to get an accurate understanding of coral community responses. We tested the responses of seven coral species (Acropora cytherea, Acropora hyacinthus, Acropora pulchra, Leptastrea pruinosa, Montipora grisea, Pavona cactus, Pocillopora verrucosa) from the Mo'orea lagoon to a 48-day exposure to three pH scenarios (pH 7.95, 7.7 and 7.3). Tissue necrosis, mortality, growth rates, photophysiological performances and colour index were recorded. Few significant differences were noted between pH 7.95 and 7.7, but species-specific responses were observed at pH 7.3. While our data do not allow identification of the mechanisms behind this diversity in response between species inhabiting the same environment, it can exclude several hypotheses such as local adaptation, skeletal type, corallum morphology or calcification rate as sole factors determining coral sensitivity to pH.
    Keywords: Acropora cytherea; Acropora hyacinthus; Acropora pulchra; Alkalinity, total; Alkalinity, total, standard error; Animalia; Aragonite saturation state; Benthic animals; Benthos; 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; Change; Cnidaria; Coast and continental shelf; Colony number/ID; Containers and aquaria (20-1000 L or 〈 1 m**2); EXP; Experiment; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Identification; Individuals; Laboratory experiment; Leptastrea pruinosa; Montipora grisea; Moorea_Lagoon; Mortality/Survival; Number; OA-ICC; Ocean Acidification International Coordination Centre; Other studied parameter or process; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Pavona cactus; pH; pH, standard error; Photosynthetic efficiency; Pocillopora verrucosa; Potentiometric; Potentiometric titration; Primary production/Photosynthesis; Proportion; Registration number of species; Replicate; Salinity; Salinity, standard error; Single species; South Pacific; Species; Temperature, water; Temperature, water, standard error; Treatment; Tropical; Type; Uniform resource locator/link to reference
    Type: Dataset
    Format: text/tab-separated-values, 20345 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 7
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    Seawater carbonate chemistry and bioaccumulation of inorganic and organic mercury in the cuttlefish Sepia officinalis (2023)
    PANGAEA
    Details
    Publication Date: 2024-03-15
    Description: The bioaccumulation of mercury (Hg) in marine organisms through various pathways has not yet been fully explored, particularly in cephalopods. This study utilises radiotracer techniques using the isotope 203Hg to investigate the toxicokinetics and the organotropism of waterborne inorganic Hg (iHg) and dietary inorganic and organic Hg (methylHg, MeHg) in juvenile common cuttlefish Sepia officinalis. The effect of two contrasting CO2 partial pressures in seawater (400 and 1600 μatm, equivalent to pH 8.08 and 7.54 respectively) and two types of prey (fish and shrimp) were tested as potential driving factors of Hg bioaccumulation. After 14 days of waterborne exposure, juvenile cuttlefish showed a stable concentration factor of 709 ± 54 and 893 ± 117 at pH 8.08 and 7.54, respectively. The accumulated dissolved i203Hg was depurated relatively rapidly with a radiotracer biological half-life (Tb1/2) of 44 ± 12 and 55 ± 16 days at pH 8.08 and 7.54, respectively. During the whole exposure period, approximately half of the i203Hg was found in the gills, but i203Hg also increased in the digestive gland. When fed with 203Hg-radiolabelled prey, cuttlefish assimilated almost all the Hg provided (〉95%) independently of the prey type. Nevertheless, the prey type played a major role on the depuration kinetics with Hg Tb1/2 approaching infinity in fish fed cuttlefish vs. 25 days in shrimp fed cuttlefish. Such a difference is explained by the different proportion of Hg species in the prey, with fish prey containing more than 80% of MeHg vs. only 30% in shrimp. Four days after ingestion of radiolabelled food, iHg was primarily found in the digestive organs while MeHg was transferred towards the muscular tissues. No significant effect of pH/pCO2 variation was observed during both the waterborne and dietary exposures on the bioaccumulation kinetics and tissue distribution of i203Hg and Me203Hg. Dietary exposure is the predominant pathway of Hg bioaccumulation in juvenile cuttlefish.
    Keywords: Activity; Activity, standard deviation; Alkalinity, total; Alkalinity, total, standard deviation; Animalia; Aragonite saturation state; Aragonite saturation state, standard deviation; Arcachon_Bay; Assimilation efficiency; Assimilation efficiency, standard deviation; Bicarbonate ion; Bicarbonate ion, standard deviation; Calcite saturation state; Calcite saturation state, standard deviation; 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; Coast and continental shelf; Containers and aquaria (20-1000 L or 〈 1 m**2); Contamination; Day of experiment; EXP; Experiment; Figure; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Fugacity of carbon dioxide in seawater, standard deviation; Identification; Laboratory experiment; Mass; Mercury-203, biological half-life; Mercury-203, biological half-life, standard deviation; Mercury-203, concentration factors; Mercury-203, concentration factors, standard deviation; Mercury-203, depuration rate constant; Mercury-203, distribution; Mercury-203, distribution, standard deviation; Mercury-203, uptake rate constant; Mollusca; Nekton; North Atlantic; OA-ICC; Ocean Acidification International Coordination Centre; Other; Other metabolic rates; 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; Phase; Prey taxa; Salinity; Sepia officinalis; Single species; Species, unique identification; Species, unique identification (Semantic URI); Species, unique identification (URI); Temperate; Temperature, water; Temperature, water, standard deviation; Time in days; Tissues; Treatment: pH; Type
    Type: Dataset
    Format: text/tab-separated-values, 19382 data points
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    DATA PANGAEA
  • 8
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    Seawater carbonate chemistry and 109Cd, 57Co, and 134Cs bioconcentration by the European oyster (Ostrea edulis) (2018)
    PANGAEA
    In:  Supplement to: Sezer, Narin; Kılıç, Önder; Metian, Marc; Belivermis, Murat (2018): Effects of ocean acidification on 109Cd, 57Co, and 134Cs bioconcentration by the European oyster (Ostrea edulis): Biokinetics and tissue-to-subcellular partitioning. Journal of Environmental Radioactivity, 192, 376-384, https://doi.org/10.1016/j.jenvrad.2018.07.011
    Details
    Publication Date: 2024-03-15
    Description: The uptake and depuration kinetics of dissolved 109Cd, 57Co and 134Cs were determined experimentally in the European flat oyster Ostrea edulis (Linnaeus, 1758) under different pH conditions (i.e., 8.1, 7.8 and 7.5) for 59 days. Uptake and depuration rates were variable within these elements; no effects were observed under different pH conditions for the uptake biokinetics of 109Cd and 57Co and depuration of 109Cd and 134Cs in oyster. The uptake and depuration rate constants of 134Cs differed during the exposure phase between treatments, while the steady state concentration factors (CFss) were similar. The resulting Cs activity that was purged during short- and long-term depuration phases differed, while the remaining activities after thirty-nine days depuration phase (RA39d) were similar. Co-57 depuration was affected by pCO2 conditions: RA39d were found to be significantly higher in oysters reared in normocapnia (pCO2 = 350 μatm) compared to high pCO2 conditions. Co-57 tissue distribution did not differ among the variable pCO2 conditions, while 109Cd and 134Cs accumulated in soft tissue of oysters were found to be higher under the highest pCO2. Additionally, Cd, Co and Cs were stored differently in various compartments of the oyster cells, i.e. cellular debris, metal-rich granules (MRG) and metallothionein-like proteins (MTLP), respectively. The subcellular sequestration of the elements at the end of the depuration phase did not differ among pH treatments. These results suggest that bioconcentration and tissue/subcellular distribution are element-specific in the oyster, and the effects of higher pCO2 driven acidification and/or coastal acidification variably influence these processes.
    Keywords: Activity; Alkalinity, total; Alkalinity, total, standard deviation; Animalia; Aragonite saturation state; Benthic animals; Benthos; Bicarbonate ion; Cadmium-109, activity; Cadmium-109, activity, normalized; Cadmium-109, concentration factors; Caesium-134; Caesium-134, concentration factors; Caesium-134 activity per mass; Calcite saturation state; Calculated using seacarb; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Coast and continental shelf; Cobalt-57, activity; Cobalt-57, activity, normalized; Cobalt-57, concentration factors; Containers and aquaria (20-1000 L or 〈 1 m**2); Date; DATE/TIME; Duration, number of days; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Laboratory experiment; Mediterranean Sea; Mollusca; Number; OA-ICC; Ocean Acidification International Coordination Centre; Ostrea edulis; Other studied parameter or process; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Percentage; pH; pH, standard deviation; Position; Potentiometric; Potentiometric titration; Registration number of species; Salinity; Single species; Species; Temperate; Temperature, water; Temperature, water, standard deviation; Type; Uniform resource locator/link to reference; Wet mass
    Type: Dataset
    Format: text/tab-separated-values, 38839 data points
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    DATA PANGAEA
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