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  • PANGAEA  (2)
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  • 1
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    PANGAEA
    In:  Supplement to: Hendriks, Iris; Olsen, Ylva; Ramajo, L; Basso, L; Steckbauer, Alexandra; Moore, T S; Howard, J; Duarte, Carlos Manuel (2014): Photosynthetic activity buffers ocean acidification in seagrass meadows. Biogeosciences, 11(2), 333-346, https://doi.org/10.5194/bg-11-333-2014
    Publication Date: 2024-03-15
    Description: Macrophytes growing in shallow coastal zones characterised by intense metabolic activity have the capacity to modify pH within their canopy and beyond. We observed diel pH changes in shallow (5-12 m) seagrass (Posidonia oceanica) meadows spanning 0.06 pH units in September to 0.24 units in June. The carbonate system (pH, DIC, and aragonite saturation state (omega Ar)) and O2 within the meadows displayed strong diel variability driven by primary productivity, and changes in chemistry were related to structural parameters of the meadow, in particular, the leaf surface area available for photosynthesis (LAI). LAI was positively correlated to mean, max and range pHNBS and max and range omega Ar. In June, vertical mixing (as Turbulent Kinetic Energy) influenced max and min omega Ar, while in September there was no effect of hydrodynamics on the carbonate system within the canopy. Max and range omega Ar within the meadow showed a positive trend with the calcium carbonate load of the leaves, pointing to a possible link between structural parameters, omega Ar and carbonate deposition.
    Keywords: Alkalinity, total; Aragonite saturation state; Benthos; Bicarbonate ion; Biomass; Biomass/Abundance/Elemental composition; Calcite saturation state; Calcium carbonate, inorganic; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Coast and continental shelf; Field observation; Flow velocity, water; Flow velocity, water, standard error; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Growth/Morphology; Illuminance; Illuminance, standard deviation; Leaf area index; Macroalgae; Mediterranean Sea; Mediterranean Sea Acidification in a Changing Climate; MedSeA; OA-ICC; Ocean Acidification International Coordination Centre; Oxygen; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH; Plantae; Posidonia oceanica; Potentiometric; Pyrheliometer, Eppley, NIP, SN 16523E6, WRMC No. 31296; Salinity; Salinity, standard deviation; Season; Shoot density; Shoot density, standard error; Single species; Site; Species; Station label; Temperate; Temperature, water; Temperature, water, standard deviation; Time; Time point, descriptive; Tracheophyta
    Type: Dataset
    Format: text/tab-separated-values, 560 data points
    Location Call Number Expected Availability
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  • 2
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    Unknown
    PANGAEA
    In:  Supplement to: Basso, L; Hendriks, Iris; Duarte, Carlos Manuel (2015): Juvenile pen shells (Pinna nobilis) tolerate acidification but are vulnerable to warming. Estuaries and Coasts, 38(6), 1976-1985, https://doi.org/10.1007/s12237-015-9948-0
    Publication Date: 2024-03-15
    Description: In the course of this century, rising anthropogenic CO2 emissions will likely cause a decrease in ocean pH, know as ocean acidification, together with an increase of water temperature. Only in the last years, studies have focused on synergetic effects of both stressors on marine invertebrates, particularly on early life stages considered more vulnerable. Disparate responses of their singular and combined effects were reported, highlighting the importance of extending the studies to different species and populations of marine invertebrates. Here, we observed the response of important parameters such as growth, mortality and oxygen consumption of juvenile pen shell Pinna nobilis at supplied pCO2 gas levels of 400 ppm (ambient) and 1000 ppm and at three temperatures (20, 23 and 26 °C) during 36 days. To our knowledge, this is the first study on ocean acidification and temperature effects on juveniles of this species. We show that the two stressors play roles at distinct levels, with pCO2 influencing growth and partially mortality, and temperature increasing mortality rates and oxygen consumption strongly. Therefore, juveniles of P. nobilis are more likely affected by increasing temperature than the pCO2 levels expected by the end of the twenty-first century.
    Keywords: Alkalinity, total; Alkalinity, total, standard error; Animalia; Aragonite saturation state; Aragonite saturation state, standard error; Benthic animals; Benthos; Bicarbonate, standard deviation; Bicarbonate ion; Calcite saturation state; Calcite saturation state, standard error; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard deviation; Carbonate ion; Carbonate ion, standard error; Carbonate system computation flag; Carbon dioxide; Coast and continental shelf; Containers and aquaria (20-1000 L or 〈 1 m**2); EXP; Experiment; Figure; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Growth/Morphology; Growth rate; Growth rate, standard deviation; Laboratory experiment; Mallorca; Mediterranean Sea; Mollusca; Mortality; Mortality, standard deviation; Mortality, standard error; Mortality/Survival; OA-ICC; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Partial pressure of carbon dioxide (water) at sea surface temperature (wet air), standard error; pH; pH, standard error; Pinna nobilis; Potentiometric titration; Registration number of species; Respiration; Respiration rate, oxygen; Respiration rate, oxygen, standard deviation; Salinity; Salinity, standard error; Single species; Species; Spectrophotometric; Temperate; Temperature; Temperature, water; Temperature, water, standard error; Type; Uniform resource locator/link to reference
    Type: Dataset
    Format: text/tab-separated-values, 690 data points
    Location Call Number Expected Availability
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