Seawater carbonate chemistry and calcification, respiration, and photosynthesis of the widespread diatom‐bearing LBF Operculina ammonoides
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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
2020
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| author | Oron, Shai Evans, David Abramovich, Sigal Almogi-Labin, Ahuva Erez, Jonathan |
| author_facet | Oron, Shai Evans, David Abramovich, Sigal Almogi-Labin, Ahuva Erez, Jonathan |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Larger benthic foraminifera (LBF) are unicellular eukaryotic calcifying organisms and an important component of tropical and subtropical modern and ancient oceanic ecosystems. They are major calcium carbonate producers and important contributors to primary production due to the photosynthetic activity of their symbiotic algae. Studies investigating the response of LBF to seawater carbonate chemistry changes are therefore essential for understanding the impact of climate changes and ocean acidification (OA) on shallow marine ecosystems. In this study, calcification, respiration, and photosynthesis of the widespread diatom‐bearing LBF Operculina ammonoides were measured in laboratory experiments that included manipulation of carbonate chemistry parameters. pH was altered while keeping dissolved inorganic carbon (DIC) constant, and DIC was altered while keeping pH constant. The results show clear vulnerability of O. ammonoides to low pH and CO32− under constant DIC conditions, and no increased photosynthesis or calcification under high DIC concentrations. Our results call into question previous hypotheses, suggesting that mechanisms such as the degree of cellular control on calcification site pH/DIC and/or enhanced symbiont photosynthesis in response to OA may render the hyaline (perforate and calcitic‐radial) LBF to be less responsive to OA than porcelaneous LBF. In addition, manipulating DIC did not affect calcification when pH was close to present seawater levels in a model encompassing the total population size range. In contrast, larger individuals (>1,200 μm, >1 mg) were sensitive to changes in DIC, a phenomenon we attribute to their physiological requirement to concentrate large quantities of DIC for their calcification process. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_929866 |
| institution | PANGAEA |
| language | en |
| publishDate | 2020 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Seawater carbonate chemistry and calcification, respiration, and photosynthesis of the widespread diatom‐bearing LBF Operculina ammonoides Oron, Shai Evans, David Abramovich, Sigal Almogi-Labin, Ahuva Erez, Jonathan Alkalinity, total; Aragonite saturation state; Benthos; Bicarbonate ion; Bottles or small containers/Aquaria (<20 L); Calcification/Dissolution; Calcification rate of calcium carbonate; Calcite saturation state; Calcium carbonate, mass; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Chromista; Coast and continental shelf; Experiment; Experiment duration; Foraminifera; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Hydroxide ion; Identification; Individuals; Laboratory experiment; Mass; OA-ICC; Ocean acidification; Ocean Acidification International Coordination Centre; Operculina ammonoides; Oxygen evolution; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH, NBS scale; pH, total scale; Photosynthesis rate; Primary production/Photosynthesis; Ratio; Red Sea; Registration number of species; Respiration; Salinity; Single species; Size; Species; Temperate; Temperature, water; Time in hours; Treatment; Type; Uniform resource locator/link to reference; Zooplankton Larger benthic foraminifera (LBF) are unicellular eukaryotic calcifying organisms and an important component of tropical and subtropical modern and ancient oceanic ecosystems. They are major calcium carbonate producers and important contributors to primary production due to the photosynthetic activity of their symbiotic algae. Studies investigating the response of LBF to seawater carbonate chemistry changes are therefore essential for understanding the impact of climate changes and ocean acidification (OA) on shallow marine ecosystems. In this study, calcification, respiration, and photosynthesis of the widespread diatom‐bearing LBF Operculina ammonoides were measured in laboratory experiments that included manipulation of carbonate chemistry parameters. pH was altered while keeping dissolved inorganic carbon (DIC) constant, and DIC was altered while keeping pH constant. The results show clear vulnerability of O. ammonoides to low pH and CO32− under constant DIC conditions, and no increased photosynthesis or calcification under high DIC concentrations. Our results call into question previous hypotheses, suggesting that mechanisms such as the degree of cellular control on calcification site pH/DIC and/or enhanced symbiont photosynthesis in response to OA may render the hyaline (perforate and calcitic‐radial) LBF to be less responsive to OA than porcelaneous LBF. In addition, manipulating DIC did not affect calcification when pH was close to present seawater levels in a model encompassing the total population size range. In contrast, larger individuals (>1,200 μm, >1 mg) were sensitive to changes in DIC, a phenomenon we attribute to their physiological requirement to concentrate large quantities of DIC for their calcification process. |
| title | Seawater carbonate chemistry and calcification, respiration, and photosynthesis of the widespread diatom‐bearing LBF Operculina ammonoides |
| topic | Alkalinity, total; Aragonite saturation state; Benthos; Bicarbonate ion; Bottles or small containers/Aquaria (<20 L); Calcification/Dissolution; Calcification rate of calcium carbonate; Calcite saturation state; Calcium carbonate, mass; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Chromista; Coast and continental shelf; Experiment; Experiment duration; Foraminifera; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Hydroxide ion; Identification; Individuals; Laboratory experiment; Mass; OA-ICC; Ocean acidification; Ocean Acidification International Coordination Centre; Operculina ammonoides; Oxygen evolution; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH, NBS scale; pH, total scale; Photosynthesis rate; Primary production/Photosynthesis; Ratio; Red Sea; Registration number of species; Respiration; Salinity; Single species; Size; Species; Temperate; Temperature, water; Time in hours; Treatment; Type; Uniform resource locator/link to reference; Zooplankton |
| url | https://doi.org/10.1594/PANGAEA.929866 |