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  • Alkalinity, total; Aragonite saturation state; Balanophyllia europaea; Benthos; Bicarbonate ion; Biomass/Abundance/Elemental composition; Calcite saturation state; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon; Carbon, inorganic, dissolved; Carbon/Nitrogen ratio; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Category; Chlorophyll a; Chlorophyll a per cell; CO2 vent; Coast and continental shelf; Effective quantum yield; Entire community; Field observation; Fluorescence, maximum; Fluorescence, minimum; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Mediterranean Sea; Nitrogen; OA-ICC; Ocean Acidification International Coordination Centre; Other studied parameter or process; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH; Primary production/Photosynthesis; Rocky-shore community; Salinity; Site; Symbiont cell density; Temperate; Temperature, water; Time point, descriptive; Type; δ13C; δ15N  (1)
  • Dunaliella  (1)
Document type
Keywords
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  • 1
    Electronic Resource
    Electronic Resource
    On the red coloration of saltern crystallizer ponds. II. Additional evidence for the contribution of halobacterial pigments (1994)
    Springer
    International journal of salt lake research 3 (1994), S. 9-13 
    Details
    ISSN: 1573-8590
    Keywords: solar salterns ; Halobacterium ; Dunaliella ; bacterioruberin ; β-carotene
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geography
    Notes: Abstract In a previous paper we attempted to assess the contribution of red bacteria of theHalobacterium — Haloferax — Haloarcula group and of the β-carotene-rich green algaDunaliella salina to the red colour of saltern crystallizer ponds. By means of light absorption measurements, we showed that bacterioruberin contained in the bacteria was mainly responsible for the colour of the brines, in spite of the fact that β-carotene derived fromDunaliella was the pigment present in the greatest amount. This apparent discrepancy was explained by the very smallin vivo optical cross-section of β-carotene, which is densely packed in globules inside theD. salina cells. We recently observed that the centrifugation technique used in the previous study to collect biomass from the ponds was unsuitable for this type of measurements, as a substantial part of theDunaliella cells present did not sediment upon centrifugation due to the low specific gravity caused by the high β-carotene content. Therefore similar measurements were performed with biomass collected by filtration. Again,in vivo absorption spectra were dominated by the absorption peaks of bacterioruberin. The results reported here show that, in spite of the methodological problem associated with the earlier study, all views and conclusions expressed in our earlier paper retain their validity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01990638
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    Paper (German National Licenses)
    Fulltext
  • 2
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    Unknown
    Seawater carbonate chemistry and acclimatization of a coral-dinoflagellate mutualism at a CO2 vent (2023)
    PANGAEA
    Details
    Publication Date: 2024-03-15
    Description: Ocean acidification caused by shifts in ocean carbonate chemistry resulting from increased atmospheric CO2 concentrations is threatening many calcifying organisms, including corals. Here we assessed autotrophy vs heterotrophy shifts in the Mediterranean zooxanthellate scleractinian coral Balanophyllia europaea acclimatized to low pH/high pCO2 conditions at a CO2 vent off Panarea Island (Italy). Dinoflagellate endosymbiont densities were higher at lowest pH Sites where changes in the distribution of distinct haplotypes of a host-specific symbiont species, Philozoon balanophyllum, were observed. An increase in symbiont C/N ratios was observed at low pH, likely as a result of increased C fixation by higher symbiont cell densities. δ13C values of the symbionts and host tissue reached similar values at the lowest pH Site, suggesting an increased influence of autotrophy with increasing acidification. Host tissue δ15N values of 0‰ strongly suggest that diazotroph N2 fixation is occurring within the coral tissue/mucus at the low pH Sites, likely explaining the decrease in host tissue C/N ratios with acidification. Overall, our findings show an acclimatization of this coral-dinoflagellate mutualism through trophic adjustment and symbiont haplotype differences with increasing acidification, highlighting that some corals are capable of acclimatizing to ocean acidification predicted under end-of-century scenarios.
    Keywords: Alkalinity, total; Aragonite saturation state; Balanophyllia europaea; Benthos; Bicarbonate ion; Biomass/Abundance/Elemental composition; Calcite saturation state; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon; Carbon, inorganic, dissolved; Carbon/Nitrogen ratio; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Category; Chlorophyll a; Chlorophyll a per cell; CO2 vent; Coast and continental shelf; Effective quantum yield; Entire community; Field observation; Fluorescence, maximum; Fluorescence, minimum; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Mediterranean Sea; Nitrogen; OA-ICC; Ocean Acidification International Coordination Centre; Other studied parameter or process; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH; Primary production/Photosynthesis; Rocky-shore community; Salinity; Site; Symbiont cell density; Temperate; Temperature, water; Time point, descriptive; Type; δ13C; δ15N
    Type: Dataset
    Format: text/tab-separated-values, 10150 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
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