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  • 1
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    Investigation of escape response of Norwegian Pecten maximus
    PANGAEA
    In:  Supplement to: Schalkhausser, Burgel; Bock, Christian; Stemmer, Kristina; Brey, Thomas; Pörtner, Hans-Otto; Lannig, Gisela (2013): Impact of ocean acidification on escape performance of the king scallop, Pecten maximus, from Norway. Marine Biology, 160(8), 1995-2006, https://doi.org/10.1007/s00227-012-2057-8
    Details
    Publication Date: 2023-05-12
    Description: The ongoing process of ocean acidification already affects marine life and, according to the concept of oxygen- and capacity limitation of thermal tolerance (OCLTT), these effects may be exacerbated at the boarders of the thermal tolerance window. We studied the effects of elevated CO2 concentrations on clapping performance and energy metabolism of the commercially important scallop Pecten maximus. Individuals were exposed for at least 30 days to 4°C (winter) or to 10°C (spring/summer) at either ambient (0.04 kPa, normocapnia) or predicted future PCO2 levels (0.11 kPa, hypercapnia). Cold (4°C) exposed groups revealed thermal stress exacerbated by PCO2 indicated by a high mortality overall and its increase from 55% under normocapnia to 90% under hypercapnia. We therefore excluded the 4°C groups from further experimentation. Scallops at 10°C showed impaired clapping performance following hypercapnic exposure. Force production was significantly reduced although the number of claps was unchanged between normo- and hypercapnia exposed scallops. The difference between maximal and resting metabolic rate (aerobic scope) of the hypercapnic scallops was significantly reduced compared to normocapnic animals, indicating a reduction in net aerobic scope. Our data confirm that ocean acidification narrows the thermal tolerance range of scallops resulting in elevated vulnerability to temperature extremes and impairs the animal's performance capacity with potentially detrimental consequences for its fitness and survival in the ocean of tomorrow.
    Keywords: BIOACID; Biological Impacts of Ocean Acidification
    Type: Dataset
    Format: application/zip, 5 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
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    Morphology of Pecten maximus and incubation time
    PANGAEA
    Details
    Publication Date: 2023-05-12
    Keywords: Biomass, dry mass; Biomass, shell, dry mass; Biomass, shell, wet mass; Biomass, wet mass; Calculated; Condition index; Duration, number of days; Muscle, diameter; Muscle, dry mass; Muscle, wet mass; Muscle condition index; Pecten maximus, height; Pecten maximus, length; Pecten maximus, width; Sample code/label; Treatment; Vernier caliper; Weighted
    Type: Dataset
    Format: text/tab-separated-values, 750 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    (Fig. 3) Clapping performance of Pecten maximus after long-term incubation under normocapnia and hypercapnia at 10 °C
    PANGAEA
    Details
    Publication Date: 2023-05-12
    Keywords: Advanced Force Gauge (AFG), Mecmesin, 50 N; Force; Number of claps; Sample code/label; Treatment
    Type: Dataset
    Format: text/tab-separated-values, 160 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    (Fig. 4) Oxygen consumption of Pecten maximus after long-term incubation under normocapnia and hypercapnia at 10 °C
    PANGAEA
    Details
    Publication Date: 2023-05-12
    Keywords: Calculated; Net aerobic scope; Oxygen optode, PreSens, Type Heilmayer; Pecten maximus, metabolic oxygen consumption; Sample code/label; Treatment
    Type: Dataset
    Format: text/tab-separated-values, 104 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    (Table 2) Haemolymph parameters of Pecten maximus at rest and after exercise following long-term incubation under normocapnia (seawater PCO2 ~0.040 kPa) and hypercapnia (seawater PCO2 ~0.112 kPa) at 10 °C
    PANGAEA
    Details
    Publication Date: 2023-05-12
    Keywords: Blood gas analyser, Eschweiler, MT 33; Calculated; Gas chromatography, Agilent 6890 N GC System, Agilent Technologies; Pecten maximus, haemolymph, bicarbonate ion; Pecten maximus, haemolymph, carbon dioxide partial pressure; Pecten maximus, haemolymph, oxygen partial pressure; Pecten maximus, haemolymph, pH; Pecten maximus, haemolymph, total carbon dioxide; Sample code/label; Treatment
    Type: Dataset
    Format: text/tab-separated-values, 263 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
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    (Table 1) Physicochemical conditions of seawater after long-term incubations of Pecten maximus during normocapnia and hypercapnia at different temperatures (4 and 10 °C acclimation) (2013)
    PANGAEA
    Details
    Publication Date: 2024-02-16
    Keywords: Calculated; Calculated using CO2SYS; Carbon, inorganic, dissolved; Carbon dioxide, partial pressure; DATE/TIME; pH; pH meter, WTW, pH 3310; Salinity; Salinometer, WTW ProfiLine Cond 1970i; Seal QuAAtro SFA Analyzer, Seal Analytical, 800 TM; Temperature, water; Temperature probe; TP; Treatment
    Type: Dataset
    Format: text/tab-separated-values, 835 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 7
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    Elevated CO2 levels do not affect the shell structure of the bivalve Arctica islandica from the western Baltic (2013)
    PANGAEA
    In:  Supplement to: Stemmer, Kristina; Nehrke, Gernot; Brey, Thomas (2013): Elevated CO2 Levels do not Affect the Shell Structure of the Bivalve Arctica islandica from the Western Baltic. PLoS ONE, 8(7), e70106, https://doi.org/10.1371/journal.pone.0070106
    Details
    Publication Date: 2024-03-15
    Description: Shells of the bivalve Arctica islandica are used to reconstruct paleo-environmental conditions (e.g. temperature) via biogeochemical proxies, i.e. biogenic components that are related closely to environmental parameters at the time of shell formation. Several studies have shown that proxies like element and isotope-ratios can be affected by shell growth and microstructure. Thus it is essential to evaluate the impact of changing environmental parameters such as high pCO2 and consequent changes in carbonate chemistry on shell properties to validate these biogeochemical proxies for a wider range of environmental conditions. Growth experiments with Arctica islandica from the Western Baltic Sea kept under different pCO2 levels (from 380 to 1120 µatm) indicate no affect of elevated pCO2 on shell growth or crystal microstructure, indicating that A. islandica shows an adaptation to a wider range of pCO2 levels than reported for other species. Accordingly, proxy information derived from A. islandica shells of this region contains no pCO2 related bias.
    Keywords: Alkalinity, total; Alkalinity, total, standard deviation; Animalia; Aragonite saturation state; Aragonite saturation state, standard deviation; Arctica islandica; Baltic Sea; Benthic animals; Benthos; Bicarbonate ion; Bottles or small containers/Aquaria (〈20 L); Calcein mark; 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; Coast and continental shelf; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Growth/Morphology; Growth rate; Identification; Laboratory experiment; Mollusca; 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; Potentiometric; Potentiometric titration; Salinity; Salinity, standard deviation; Sample code/label; Single species; Species; Temperate; Temperature, water; Temperature, water, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 1377 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 8
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    Seawater carbonate chemistry and biological processes in experiments of the Norwegian sea (2013)
    PANGAEA
    Details
    Publication Date: 2024-03-15
    Keywords: Acid-base regulation; Advanced Force Gauge (AFG), Mecmesin, 50 N; Alkalinity, total; Animalia; Aragonite saturation state; Behaviour; Benthic animals; Benthos; Bicarbonate ion; Biomass, dry mass; Biomass, shell, dry mass; Biomass, shell, wet mass; Biomass, wet mass; Blood gas analyser, Eschweiler, MT 33; Calcite saturation state; Calculated; 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; Coast and continental shelf; Condition index; Containers and aquaria (20-1000 L or 〈 1 m**2); Coulometric titration; Force; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Gas chromatography, Agilent 6890 N GC System, Agilent Technologies; Growth/Morphology; Height; Incubation duration; Laboratory experiment; Length; Mollusca; Muscle, diameter; Muscle, dry mass; Muscle, wet mass; Muscle condition index; Net aerobic scope; North Atlantic; Number of claps; 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); Pecten maximus; Pecten maximus, haemolymph, bicarbonate ion; Pecten maximus, haemolymph, carbon dioxide partial pressure; Pecten maximus, haemolymph, oxygen partial pressure; Pecten maximus, haemolymph, pH; Pecten maximus, haemolymph, total carbon dioxide; pH; pH, standard deviation; Potentiometric; Respiration; Respiration rate, oxygen; Salinity; Salinity, standard deviation; Salinometer, WTW ProfiLine Cond 1970i; Sample code/label; Single species; Species; Temperate; Temperature; Temperature, standard deviation; Temperature, water; Temperature probe; TP; Treatment; Vernier caliper; Weighted; Width
    Type: Dataset
    Format: text/tab-separated-values, 1973 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 9
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    Shell formation and microstucture of the ocean quahog Arctica islandica: Does ocean acidification matter? (2013)
    Staats- und Universitaetsbibliothek Bremen
    In:  EPIC3Staats- und Universitaetsbibliothek Bremen, 143 p.
    Details
    Publication Date: 2019-07-17
    Description: Carbon dioxide concentration (pCO2) in the ocean is steadily increasing causing a drop of pH, consequently turning the surface seawater more acidic. Due to possible adaptation mechanisms some marine organisms can cope better with high pCO2 and low pH than others. The ocean quahog Arctica islandica is widely distributed in the North Atlantic region. Populations of this species are also well established in the high fluctuating environment of the Kiel Bight in the Western Baltic Sea and show high tolerance to environmental parameters like salinity, temperature and low oxygen levels. In my thesis I am interested in the performance of A. islandica from Kiel Bight to build and maintain its shell in a high pCO2 environment and the general aspects of bivalve shell properties as well as the site of calcification within the bivalve as a prerequisite for a mechanistic understanding of the biomineralization process. This thesis summarizes i) A. islandica from Kiel Bight populations is resistant and most likely pre-adapted towards elevated pCO2 over a short period of time (90 days) and contributes to the fundamental understanding of ii) single organic shell-compounds identified as pigment polyenes, that are not habitat related and may contribute to shell formation and iii) the calcification process itself is not happening inside the bulk EPF but rather within a supersaturated microsite created by active ion pumping by the OME. Understanding the biomineralization process and all components involved is crucial and thus the next challenge in order to estimate the robustness of A. islandica and other marine calcifiers in a high pCO2 world.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Thesis , notRev
    Format: application/pdf
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    PAPER (OA)
  • 10
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    Physiological response of pectinid bivalves to an acidifying and warming ocean (2010)
    In:  EPIC3BIOACID / EPOCA / UKOARP Meeting, Bremerhaven, 2010-09-27-2010-09-30
    Details
    Publication Date: 2019-08-19
    Description: The aim of this research project is to analyse the physiological response of an active calcifier (bivalves) to ocean acidification (OA) and ocean warming on the organismic and cellular level. The work is based on a comparison between temperate (Pecten maximus) and sub-arctic (Chlamys islandica) pectinids. We investigate the effect of different OA scenarios (390, 750, 1120 ppm CO2) at two different temperature regimes (long-term acclimation to mean habitat and elevated temperature). The incubation of C. islandica and P. maximus at 0°C and 10°C, respectively, started using a re-circulated system. Preliminary results obtained on C. islandica after long-term incubation at 390 and 1120 ppm CO2 (≥8 weeks) suggest that OA has no impact on routine metabolism of the animals. Following exhausted exercise metabolic rate rose by a factor of ~2 in both groups indicating again similar rates in control and OA-exposed animals. Further analysis of aerobic and anaerobic metabolites during recovery phase will be conducted using NMR spectroscopy. Tissue samples from different organs will be taken for a mostly complete metabolic analysis (e.g. muscle, mantle, gill) and hemolymph pH will be measured. Energy dependent cellular processes such as ion regulation, protein synthesis will be determined by on-line profiling using Bionas® analyzing system.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , notRev
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    PAPER (OA)
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