Benthic Ecosystem Calcification Measured with Coupled pH and O Aquatic Eddy Covariance.
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| Auteurs principaux: | , , , , , , , , |
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| Format: | Artículo científico |
| Langue: | en |
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ACS ES&T water
2026
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| _version_ | 1868266048924418048 |
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| author | Koopmans, Dirk Schaap, Allison Meyer, Volker Färber, Paul Queiss, Lauren Montilla, Luis Loucaides, Socratis Ahmerkamp, Soeren Cardini, Ulisse |
| author_facet | Koopmans, Dirk Schaap, Allison Meyer, Volker Färber, Paul Queiss, Lauren Montilla, Luis Loucaides, Socratis Ahmerkamp, Soeren Cardini, Ulisse Koopmans, Dirk Schaap, Allison Meyer, Volker Färber, Paul Queiss, Lauren Montilla, Luis Loucaides, Socratis Ahmerkamp, Soeren Cardini, Ulisse |
| collection | PubMed - marine biology |
| contents | Benthic Ecosystem Calcification Measured with Coupled pH and O Aquatic Eddy Covariance. Koopmans, Dirk Schaap, Allison Meyer, Volker Färber, Paul Queiss, Lauren Montilla, Luis Loucaides, Socratis Ahmerkamp, Soeren Cardini, Ulisse We present a method to quantify benthic ecosystem calcification from simultaneous pH (proton) and O eddy covariance flux measurements. In benthic ecosystems, photosynthesis is a proton sink, while calcification is a proton source. Where calcification is the dominant nonmetabolic proton source, it can be isolated as the residual between the measured proton flux and the flux predicted from O-derived metabolism. We demonstrate this technique in seagrass meadows near Ischia, Italy, where coralline algae epiphytes are the primary calcifiers. The method resolved a diurnal calcification signal consistent in magnitude with previous estimates for seagrass epiphytes. However, our pH measurements and proton fluxes also revealed widespread, diffusive CO vent influence at both the vent-adjacent site and the control site (670 m away), demonstrating that control sites near natural CO vents may not provide the stable baseline often assumed. Excluding the vent-affected data removed substantial portions of the data set, resulting in high uncertainty, while also illustrating the insights that high-speed multiparameter sensing provides. Our error analysis identifies accuracy in pH, alkalinity, and the ecosystem photosynthetic quotient as critical constraints on this and other pH-O based calcification measurements, particularly in environments where calcification rates are small relative to metabolic fluxes. |
| format | Artículo científico |
| id | pubmed_42131257 |
| institution | PubMed |
| language | en |
| publishDate | 2026 |
| publisher | ACS ES&T water |
| record_format | pubmed |
| spellingShingle | Benthic Ecosystem Calcification Measured with Coupled pH and O Aquatic Eddy Covariance. Koopmans, Dirk Schaap, Allison Meyer, Volker Färber, Paul Queiss, Lauren Montilla, Luis Loucaides, Socratis Ahmerkamp, Soeren Cardini, Ulisse Benthic Ecosystem Calcification Measured with Coupled pH and O Aquatic Eddy Covariance. Koopmans, Dirk Schaap, Allison Meyer, Volker Färber, Paul Queiss, Lauren Montilla, Luis Loucaides, Socratis Ahmerkamp, Soeren Cardini, Ulisse We present a method to quantify benthic ecosystem calcification from simultaneous pH (proton) and O eddy covariance flux measurements. In benthic ecosystems, photosynthesis is a proton sink, while calcification is a proton source. Where calcification is the dominant nonmetabolic proton source, it can be isolated as the residual between the measured proton flux and the flux predicted from O-derived metabolism. We demonstrate this technique in seagrass meadows near Ischia, Italy, where coralline algae epiphytes are the primary calcifiers. The method resolved a diurnal calcification signal consistent in magnitude with previous estimates for seagrass epiphytes. However, our pH measurements and proton fluxes also revealed widespread, diffusive CO vent influence at both the vent-adjacent site and the control site (670 m away), demonstrating that control sites near natural CO vents may not provide the stable baseline often assumed. Excluding the vent-affected data removed substantial portions of the data set, resulting in high uncertainty, while also illustrating the insights that high-speed multiparameter sensing provides. Our error analysis identifies accuracy in pH, alkalinity, and the ecosystem photosynthetic quotient as critical constraints on this and other pH-O based calcification measurements, particularly in environments where calcification rates are small relative to metabolic fluxes. |
| title | Benthic Ecosystem Calcification Measured with Coupled pH and O Aquatic Eddy Covariance. |
| url | https://pubmed.ncbi.nlm.nih.gov/42131257/ |