The influence of seawater pH on U / Ca ratios in the scleractinian cold-water coral Lophelia pertusa
The increasing p CO 2 in seawater is a serious threat for marine calcifiers and alters the biogeochemistry of the ocean. Therefore, the reconstruction of past-seawater properties and their impact on marine ecosystems is an important way to investigate the underlying mechanisms and to better constrai...
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ftcopernicus:oai:publications.copernicus.org:bg21634 2023-05-15T17:08:38+02:00 The influence of seawater pH on U / Ca ratios in the scleractinian cold-water coral Lophelia pertusa Raddatz, J. Rüggeberg, A. Flögel, S. Hathorne, E. C. Liebetrau, V. Eisenhauer, A. Dullo, W.-Chr. 2018-09-27 application/pdf https://doi.org/10.5194/bg-11-1863-2014 https://www.biogeosciences.net/11/1863/2014/ eng eng doi:10.5194/bg-11-1863-2014 https://www.biogeosciences.net/11/1863/2014/ eISSN: 1726-4189 Text 2018 ftcopernicus https://doi.org/10.5194/bg-11-1863-2014 2019-12-24T09:54:36Z The increasing p CO 2 in seawater is a serious threat for marine calcifiers and alters the biogeochemistry of the ocean. Therefore, the reconstruction of past-seawater properties and their impact on marine ecosystems is an important way to investigate the underlying mechanisms and to better constrain the effects of possible changes in the future ocean. Cold-water coral (CWC) ecosystems are biodiversity hotspots. Living close to aragonite undersaturation, these corals serve as living laboratories as well as archives to reconstruct the boundary conditions of their calcification under the carbonate system of the ocean. We investigated the reef-building CWC Lophelia pertusa as a recorder of intermediate ocean seawater pH. This species-specific field calibration is based on a unique sample set of live in situ collected L. pertusa and corresponding seawater samples. These data demonstrate that uranium speciation and skeletal incorporation for azooxanthellate scleractinian CWCs is pH dependent and can be reconstructed with an uncertainty of ±0.15. Our Lophelia U / Ca–pH calibration appears to be controlled by the high pH values and thus highlighting the need for future coral and seawater sampling to refine this relationship. However, this study recommends L. pertusa as a new archive for the reconstruction of intermediate water mass pH and hence may help to constrain tipping points for ecosystem dynamics and evolutionary characteristics in a changing ocean. Text Lophelia pertusa Copernicus Publications: E-Journals Biogeosciences 11 7 1863 1871 |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
The increasing p CO 2 in seawater is a serious threat for marine calcifiers and alters the biogeochemistry of the ocean. Therefore, the reconstruction of past-seawater properties and their impact on marine ecosystems is an important way to investigate the underlying mechanisms and to better constrain the effects of possible changes in the future ocean. Cold-water coral (CWC) ecosystems are biodiversity hotspots. Living close to aragonite undersaturation, these corals serve as living laboratories as well as archives to reconstruct the boundary conditions of their calcification under the carbonate system of the ocean. We investigated the reef-building CWC Lophelia pertusa as a recorder of intermediate ocean seawater pH. This species-specific field calibration is based on a unique sample set of live in situ collected L. pertusa and corresponding seawater samples. These data demonstrate that uranium speciation and skeletal incorporation for azooxanthellate scleractinian CWCs is pH dependent and can be reconstructed with an uncertainty of ±0.15. Our Lophelia U / Ca–pH calibration appears to be controlled by the high pH values and thus highlighting the need for future coral and seawater sampling to refine this relationship. However, this study recommends L. pertusa as a new archive for the reconstruction of intermediate water mass pH and hence may help to constrain tipping points for ecosystem dynamics and evolutionary characteristics in a changing ocean. |
format |
Text |
author |
Raddatz, J. Rüggeberg, A. Flögel, S. Hathorne, E. C. Liebetrau, V. Eisenhauer, A. Dullo, W.-Chr. |
spellingShingle |
Raddatz, J. Rüggeberg, A. Flögel, S. Hathorne, E. C. Liebetrau, V. Eisenhauer, A. Dullo, W.-Chr. The influence of seawater pH on U / Ca ratios in the scleractinian cold-water coral Lophelia pertusa |
author_facet |
Raddatz, J. Rüggeberg, A. Flögel, S. Hathorne, E. C. Liebetrau, V. Eisenhauer, A. Dullo, W.-Chr. |
author_sort |
Raddatz, J. |
title |
The influence of seawater pH on U / Ca ratios in the scleractinian cold-water coral Lophelia pertusa |
title_short |
The influence of seawater pH on U / Ca ratios in the scleractinian cold-water coral Lophelia pertusa |
title_full |
The influence of seawater pH on U / Ca ratios in the scleractinian cold-water coral Lophelia pertusa |
title_fullStr |
The influence of seawater pH on U / Ca ratios in the scleractinian cold-water coral Lophelia pertusa |
title_full_unstemmed |
The influence of seawater pH on U / Ca ratios in the scleractinian cold-water coral Lophelia pertusa |
title_sort |
influence of seawater ph on u / ca ratios in the scleractinian cold-water coral lophelia pertusa |
publishDate |
2018 |
url |
https://doi.org/10.5194/bg-11-1863-2014 https://www.biogeosciences.net/11/1863/2014/ |
genre |
Lophelia pertusa |
genre_facet |
Lophelia pertusa |
op_source |
eISSN: 1726-4189 |
op_relation |
doi:10.5194/bg-11-1863-2014 https://www.biogeosciences.net/11/1863/2014/ |
op_doi |
https://doi.org/10.5194/bg-11-1863-2014 |
container_title |
Biogeosciences |
container_volume |
11 |
container_issue |
7 |
container_start_page |
1863 |
op_container_end_page |
1871 |
_version_ |
1766064446694752256 |