pH up-regulation as a potential mechanism for the cold-water coral Lophelia pertusa to sustain growth in aragonite undersaturated conditions
Cold-water corals are important habitat formers in deep-water ecosystems and at high latitudes. Ocean acidification and the resulting change in aragonite saturation are expected to affect these habitats and impact coral growth. Counter to expectations, the deep water coral Lophelia pertusa has been...
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ftdoajarticles:oai:doaj.org/article:17d6b50b4c70415f8d76b1e0754652bc 2023-05-15T17:08:39+02:00 pH up-regulation as a potential mechanism for the cold-water coral Lophelia pertusa to sustain growth in aragonite undersaturated conditions M. Wall F. Ragazzola L. C. Foster A. Form D. N. Schmidt 2015-12-01T00:00:00Z https://doi.org/10.5194/bg-12-6869-2015 https://doaj.org/article/17d6b50b4c70415f8d76b1e0754652bc EN eng Copernicus Publications http://www.biogeosciences.net/12/6869/2015/bg-12-6869-2015.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 1726-4170 1726-4189 doi:10.5194/bg-12-6869-2015 https://doaj.org/article/17d6b50b4c70415f8d76b1e0754652bc Biogeosciences, Vol 12, Iss 23, Pp 6869-6880 (2015) Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 article 2015 ftdoajarticles https://doi.org/10.5194/bg-12-6869-2015 2022-12-31T13:06:45Z Cold-water corals are important habitat formers in deep-water ecosystems and at high latitudes. Ocean acidification and the resulting change in aragonite saturation are expected to affect these habitats and impact coral growth. Counter to expectations, the deep water coral Lophelia pertusa has been found to be able to sustain growth even in undersaturated conditions. However, it is important to know whether such undersaturation modifies the skeleton and thus its ecosystem functioning. Here we used Synchrotron X-Ray Tomography and Raman spectroscopy to examine changes in skeleton morphology and fibre orientation. We combined the morphological assessment with boron isotope analysis to determine if changes in growth are related to changes in control of calcification pH. We compared the isotopic composition and structure formed in their natural environment to material grown in culture at lower pH conditions. Skeletal morphology is highly variable but shows no distinctive differences between natural and low pH conditions. Raman investigations found no difference in macromorphological skeletal arrangement of early mineralization zones and secondary thickening between the treatments. The δ 11 B analyses show that L. pertusa up-regulates the internal calcifying fluid pH (pH cf ) during calcification compared to ambient seawater pH and maintains a similar elevated pH cf at increased p CO 2 conditions. We suggest that as long as the energy is available to sustain the up-regulation, i.e. individuals are well fed, there is no detrimental effect to the skeletal morphology. Article in Journal/Newspaper Lophelia pertusa Ocean acidification Directory of Open Access Journals: DOAJ Articles Biogeosciences 12 23 6869 6880 |
institution |
Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
spellingShingle |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 M. Wall F. Ragazzola L. C. Foster A. Form D. N. Schmidt pH up-regulation as a potential mechanism for the cold-water coral Lophelia pertusa to sustain growth in aragonite undersaturated conditions |
topic_facet |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
description |
Cold-water corals are important habitat formers in deep-water ecosystems and at high latitudes. Ocean acidification and the resulting change in aragonite saturation are expected to affect these habitats and impact coral growth. Counter to expectations, the deep water coral Lophelia pertusa has been found to be able to sustain growth even in undersaturated conditions. However, it is important to know whether such undersaturation modifies the skeleton and thus its ecosystem functioning. Here we used Synchrotron X-Ray Tomography and Raman spectroscopy to examine changes in skeleton morphology and fibre orientation. We combined the morphological assessment with boron isotope analysis to determine if changes in growth are related to changes in control of calcification pH. We compared the isotopic composition and structure formed in their natural environment to material grown in culture at lower pH conditions. Skeletal morphology is highly variable but shows no distinctive differences between natural and low pH conditions. Raman investigations found no difference in macromorphological skeletal arrangement of early mineralization zones and secondary thickening between the treatments. The δ 11 B analyses show that L. pertusa up-regulates the internal calcifying fluid pH (pH cf ) during calcification compared to ambient seawater pH and maintains a similar elevated pH cf at increased p CO 2 conditions. We suggest that as long as the energy is available to sustain the up-regulation, i.e. individuals are well fed, there is no detrimental effect to the skeletal morphology. |
format |
Article in Journal/Newspaper |
author |
M. Wall F. Ragazzola L. C. Foster A. Form D. N. Schmidt |
author_facet |
M. Wall F. Ragazzola L. C. Foster A. Form D. N. Schmidt |
author_sort |
M. Wall |
title |
pH up-regulation as a potential mechanism for the cold-water coral Lophelia pertusa to sustain growth in aragonite undersaturated conditions |
title_short |
pH up-regulation as a potential mechanism for the cold-water coral Lophelia pertusa to sustain growth in aragonite undersaturated conditions |
title_full |
pH up-regulation as a potential mechanism for the cold-water coral Lophelia pertusa to sustain growth in aragonite undersaturated conditions |
title_fullStr |
pH up-regulation as a potential mechanism for the cold-water coral Lophelia pertusa to sustain growth in aragonite undersaturated conditions |
title_full_unstemmed |
pH up-regulation as a potential mechanism for the cold-water coral Lophelia pertusa to sustain growth in aragonite undersaturated conditions |
title_sort |
ph up-regulation as a potential mechanism for the cold-water coral lophelia pertusa to sustain growth in aragonite undersaturated conditions |
publisher |
Copernicus Publications |
publishDate |
2015 |
url |
https://doi.org/10.5194/bg-12-6869-2015 https://doaj.org/article/17d6b50b4c70415f8d76b1e0754652bc |
genre |
Lophelia pertusa Ocean acidification |
genre_facet |
Lophelia pertusa Ocean acidification |
op_source |
Biogeosciences, Vol 12, Iss 23, Pp 6869-6880 (2015) |
op_relation |
http://www.biogeosciences.net/12/6869/2015/bg-12-6869-2015.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 1726-4170 1726-4189 doi:10.5194/bg-12-6869-2015 https://doaj.org/article/17d6b50b4c70415f8d76b1e0754652bc |
op_doi |
https://doi.org/10.5194/bg-12-6869-2015 |
container_title |
Biogeosciences |
container_volume |
12 |
container_issue |
23 |
container_start_page |
6869 |
op_container_end_page |
6880 |
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1766064473386254336 |