Quantifying the pH 'vital effect' in the temperate zooxanthellate coral Cladocora caespitosa: Validation of the boron seawater pH proxy
Boron isotopic and elemental systematics are used to define the vital effects for the temperate shallow water Mediterranean coral Cladocora caespitosa. The corals are from a range of seawater pH conditions (pHT ~7.6 to ~8.1) and environmental settings: (1) naturally living colonies harvested from no...
Published in: | Earth and Planetary Science Letters |
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Online Access: | http://hdl.handle.net/1885/66937 https://doi.org/10.1016/j.epsl.2011.01.030 https://openresearch-repository.anu.edu.au/bitstream/1885/66937/5/Trotter_Mortimer_Quantifying_2011.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/66937/7/01_Trotter_Quantifying_the_pH_%27vital_2011.pdf.jpg |
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ftanucanberra:oai:openresearch-repository.anu.edu.au:1885/66937 2024-01-14T10:09:42+01:00 Quantifying the pH 'vital effect' in the temperate zooxanthellate coral Cladocora caespitosa: Validation of the boron seawater pH proxy Trotter, Julie Montagna, Paolo McCulloch, Malcolm Thomas Silenzi , Sergio Reynaud, Stephanie Mortimer, Graham Martin, Sophie Ferrier-Pagès, Christine Gattuso, Jean-Pierre Rodolfo-Metalpa, Riccardo http://hdl.handle.net/1885/66937 https://doi.org/10.1016/j.epsl.2011.01.030 https://openresearch-repository.anu.edu.au/bitstream/1885/66937/5/Trotter_Mortimer_Quantifying_2011.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/66937/7/01_Trotter_Quantifying_the_pH_%27vital_2011.pdf.jpg unknown Elsevier 0012-821X http://hdl.handle.net/1885/66937 doi:10.1016/j.epsl.2011.01.030 https://openresearch-repository.anu.edu.au/bitstream/1885/66937/5/Trotter_Mortimer_Quantifying_2011.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/66937/7/01_Trotter_Quantifying_the_pH_%27vital_2011.pdf.jpg Earth and Planetary Science Letters Keywords: Acropora Biological fractionation Boron isotopes Cladocora caespitosa Fractionation factors Laser ablation inductively coupled mass spectrometries Linear relationships Mediterranean New approaches Ocean acidification PCO2 pH condition PH depen Boron Seawater pH Journal article ftanucanberra https://doi.org/10.1016/j.epsl.2011.01.030 2023-12-15T09:37:56Z Boron isotopic and elemental systematics are used to define the vital effects for the temperate shallow water Mediterranean coral Cladocora caespitosa. The corals are from a range of seawater pH conditions (pHT ~7.6 to ~8.1) and environmental settings: (1) naturally living colonies harvested from normal pH waters offshore Levanto, (2) colonies transplanted nearby a subsea volcanic vent system, and (3) corals cultured in aquaria exposed to high (700μatm) and near present day (400μatm) pCO2 levels. B/Ca compositions measured using laser ablation inductively coupled mass spectrometry (LA-ICPMS) show that boron uptake by C. caespitosa cultured at different pCO2 levels is independent of ambient seawater pH being mainly controlled by temperature-dependent calcification. In contrast, the boron isotope compositions (δ11Bcarb) of the full suite of corals determined by positive thermal ionisation mass spectrometry (PTIMS) shows a clear trend of decreasing δ11Bcarb (from 26.7 to 22.2‰) with decreasing seawater pH, reflecting the strong pH dependence of the boron isotope system. The δ11Bcarb compositions together with measurements of ambient seawater parameters enable calibration of the boron pH proxy for C. caespitosa, by using a new approach that defines the relationship between ambient seawater pH (pHsw) and the internally controlled pH at the site of calcification (pHbiol). C. caespitosa exhibits a linear relationship between pHsw and the shift in pH due to physiological processes (δpH=pHbiol-pHsw) giving the regression δpHClad=4.80-0.52×pHsw for this species. We further apply this method ("δpH-pHsw") to calibrate tropical species of Porites, Acropora, and Stylophora reported in the literature. The temperate and tropical species calibrations are all linearly correlated (r2>0.9) and the biological fractionation component (δpH) between species varies within ~0.2 pH units. Our "δpH-pHsw" approach provides a robust and accurate tool to reconstruct palaeoseawater pHsw for both temperate and tropical corals, further ... Article in Journal/Newspaper Ocean acidification Australian National University: ANU Digital Collections Earth and Planetary Science Letters 303 3-4 163 173 |
institution |
Open Polar |
collection |
Australian National University: ANU Digital Collections |
op_collection_id |
ftanucanberra |
language |
unknown |
topic |
Keywords: Acropora Biological fractionation Boron isotopes Cladocora caespitosa Fractionation factors Laser ablation inductively coupled mass spectrometries Linear relationships Mediterranean New approaches Ocean acidification PCO2 pH condition PH depen Boron Seawater pH |
spellingShingle |
Keywords: Acropora Biological fractionation Boron isotopes Cladocora caespitosa Fractionation factors Laser ablation inductively coupled mass spectrometries Linear relationships Mediterranean New approaches Ocean acidification PCO2 pH condition PH depen Boron Seawater pH Trotter, Julie Montagna, Paolo McCulloch, Malcolm Thomas Silenzi , Sergio Reynaud, Stephanie Mortimer, Graham Martin, Sophie Ferrier-Pagès, Christine Gattuso, Jean-Pierre Rodolfo-Metalpa, Riccardo Quantifying the pH 'vital effect' in the temperate zooxanthellate coral Cladocora caespitosa: Validation of the boron seawater pH proxy |
topic_facet |
Keywords: Acropora Biological fractionation Boron isotopes Cladocora caespitosa Fractionation factors Laser ablation inductively coupled mass spectrometries Linear relationships Mediterranean New approaches Ocean acidification PCO2 pH condition PH depen Boron Seawater pH |
description |
Boron isotopic and elemental systematics are used to define the vital effects for the temperate shallow water Mediterranean coral Cladocora caespitosa. The corals are from a range of seawater pH conditions (pHT ~7.6 to ~8.1) and environmental settings: (1) naturally living colonies harvested from normal pH waters offshore Levanto, (2) colonies transplanted nearby a subsea volcanic vent system, and (3) corals cultured in aquaria exposed to high (700μatm) and near present day (400μatm) pCO2 levels. B/Ca compositions measured using laser ablation inductively coupled mass spectrometry (LA-ICPMS) show that boron uptake by C. caespitosa cultured at different pCO2 levels is independent of ambient seawater pH being mainly controlled by temperature-dependent calcification. In contrast, the boron isotope compositions (δ11Bcarb) of the full suite of corals determined by positive thermal ionisation mass spectrometry (PTIMS) shows a clear trend of decreasing δ11Bcarb (from 26.7 to 22.2‰) with decreasing seawater pH, reflecting the strong pH dependence of the boron isotope system. The δ11Bcarb compositions together with measurements of ambient seawater parameters enable calibration of the boron pH proxy for C. caespitosa, by using a new approach that defines the relationship between ambient seawater pH (pHsw) and the internally controlled pH at the site of calcification (pHbiol). C. caespitosa exhibits a linear relationship between pHsw and the shift in pH due to physiological processes (δpH=pHbiol-pHsw) giving the regression δpHClad=4.80-0.52×pHsw for this species. We further apply this method ("δpH-pHsw") to calibrate tropical species of Porites, Acropora, and Stylophora reported in the literature. The temperate and tropical species calibrations are all linearly correlated (r2>0.9) and the biological fractionation component (δpH) between species varies within ~0.2 pH units. Our "δpH-pHsw" approach provides a robust and accurate tool to reconstruct palaeoseawater pHsw for both temperate and tropical corals, further ... |
format |
Article in Journal/Newspaper |
author |
Trotter, Julie Montagna, Paolo McCulloch, Malcolm Thomas Silenzi , Sergio Reynaud, Stephanie Mortimer, Graham Martin, Sophie Ferrier-Pagès, Christine Gattuso, Jean-Pierre Rodolfo-Metalpa, Riccardo |
author_facet |
Trotter, Julie Montagna, Paolo McCulloch, Malcolm Thomas Silenzi , Sergio Reynaud, Stephanie Mortimer, Graham Martin, Sophie Ferrier-Pagès, Christine Gattuso, Jean-Pierre Rodolfo-Metalpa, Riccardo |
author_sort |
Trotter, Julie |
title |
Quantifying the pH 'vital effect' in the temperate zooxanthellate coral Cladocora caespitosa: Validation of the boron seawater pH proxy |
title_short |
Quantifying the pH 'vital effect' in the temperate zooxanthellate coral Cladocora caespitosa: Validation of the boron seawater pH proxy |
title_full |
Quantifying the pH 'vital effect' in the temperate zooxanthellate coral Cladocora caespitosa: Validation of the boron seawater pH proxy |
title_fullStr |
Quantifying the pH 'vital effect' in the temperate zooxanthellate coral Cladocora caespitosa: Validation of the boron seawater pH proxy |
title_full_unstemmed |
Quantifying the pH 'vital effect' in the temperate zooxanthellate coral Cladocora caespitosa: Validation of the boron seawater pH proxy |
title_sort |
quantifying the ph 'vital effect' in the temperate zooxanthellate coral cladocora caespitosa: validation of the boron seawater ph proxy |
publisher |
Elsevier |
url |
http://hdl.handle.net/1885/66937 https://doi.org/10.1016/j.epsl.2011.01.030 https://openresearch-repository.anu.edu.au/bitstream/1885/66937/5/Trotter_Mortimer_Quantifying_2011.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/66937/7/01_Trotter_Quantifying_the_pH_%27vital_2011.pdf.jpg |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Earth and Planetary Science Letters |
op_relation |
0012-821X http://hdl.handle.net/1885/66937 doi:10.1016/j.epsl.2011.01.030 https://openresearch-repository.anu.edu.au/bitstream/1885/66937/5/Trotter_Mortimer_Quantifying_2011.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/66937/7/01_Trotter_Quantifying_the_pH_%27vital_2011.pdf.jpg |
op_doi |
https://doi.org/10.1016/j.epsl.2011.01.030 |
container_title |
Earth and Planetary Science Letters |
container_volume |
303 |
container_issue |
3-4 |
container_start_page |
163 |
op_container_end_page |
173 |
_version_ |
1788064270890565632 |