Intra-Specific Variation Reveals Potential for Adaptation to Ocean Acidification in a Cold-Water Coral from the Gulf of Mexico
Ocean acidification, the decrease in seawater pH due to the absorption of atmospheric CO2, profoundly threatens the survival of a large number of marine species. Cold-water corals are considered to be among the most vulnerable organisms to ocean acidification because they are already exposed to rela...
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ftdoajarticles:oai:doaj.org/article:63a39093d4104575823d9771a127c755 2023-05-15T17:08:42+02:00 Intra-Specific Variation Reveals Potential for Adaptation to Ocean Acidification in a Cold-Water Coral from the Gulf of Mexico Melissa D. Kurman Carlos E. Gómez Samuel E. Georgian Jay J. Lunden Erik E. Cordes 2017-05-01T00:00:00Z https://doi.org/10.3389/fmars.2017.00111 https://doaj.org/article/63a39093d4104575823d9771a127c755 EN eng Frontiers Media S.A. http://journal.frontiersin.org/article/10.3389/fmars.2017.00111/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2017.00111 https://doaj.org/article/63a39093d4104575823d9771a127c755 Frontiers in Marine Science, Vol 4 (2017) Lophelia pertusa climate change deep sea carbonic anhydrase carbonate saturation Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2017 ftdoajarticles https://doi.org/10.3389/fmars.2017.00111 2022-12-31T14:40:19Z Ocean acidification, the decrease in seawater pH due to the absorption of atmospheric CO2, profoundly threatens the survival of a large number of marine species. Cold-water corals are considered to be among the most vulnerable organisms to ocean acidification because they are already exposed to relatively low pH and corresponding low calcium carbonate saturation states (Ω). Lophelia pertusa is a globally distributed cold-water scleractinian coral that provides critical three-dimensional habitat for many ecologically and economically significant species. In this study, four different genotypes of L. pertusa were exposed to three pH treatments (pH = 7.60, 7.75, and 7.90) over a short (2-week) experimental period, and six genotypes were exposed to two pH treatments (pH = 7.60 and 7.90) over a long (6-month) experimental period. Their physiological response was measured as net calcification rate and the activity of carbonic anhydrase, a key enzyme in the calcification pathway. In the short-term experiment, net calcification rates did not significantly change with pH, although they were highly variable in the low pH treatment, including some genotypes that maintained positive net calcification in undersaturated conditions. In the 6-month experiment, average net calcification was significantly reduced at low pH, with corals exhibiting net dissolution of skeleton. However, one of the same genotypes that maintained positive net calcification (+0.04% day−1) under the low pH treatment in the short-term experiment also maintained positive net calcification longer than the other genotypes in the long-term experiment, although none of the corals maintained positive calcification for the entire 6 months. Average carbonic anhydrase activity was not affected by pH, although some genotypes exhibited small, insignificant, increases in activity after the sixth month. Our results suggest that while net calcification in L. pertusa is adversely affected by ocean acidification in the long term, it is possible that some genotypes may ... Article in Journal/Newspaper Lophelia pertusa Ocean acidification Directory of Open Access Journals: DOAJ Articles Frontiers in Marine Science 4 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Lophelia pertusa climate change deep sea carbonic anhydrase carbonate saturation Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
Lophelia pertusa climate change deep sea carbonic anhydrase carbonate saturation Science Q General. Including nature conservation geographical distribution QH1-199.5 Melissa D. Kurman Carlos E. Gómez Samuel E. Georgian Jay J. Lunden Erik E. Cordes Intra-Specific Variation Reveals Potential for Adaptation to Ocean Acidification in a Cold-Water Coral from the Gulf of Mexico |
topic_facet |
Lophelia pertusa climate change deep sea carbonic anhydrase carbonate saturation Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
Ocean acidification, the decrease in seawater pH due to the absorption of atmospheric CO2, profoundly threatens the survival of a large number of marine species. Cold-water corals are considered to be among the most vulnerable organisms to ocean acidification because they are already exposed to relatively low pH and corresponding low calcium carbonate saturation states (Ω). Lophelia pertusa is a globally distributed cold-water scleractinian coral that provides critical three-dimensional habitat for many ecologically and economically significant species. In this study, four different genotypes of L. pertusa were exposed to three pH treatments (pH = 7.60, 7.75, and 7.90) over a short (2-week) experimental period, and six genotypes were exposed to two pH treatments (pH = 7.60 and 7.90) over a long (6-month) experimental period. Their physiological response was measured as net calcification rate and the activity of carbonic anhydrase, a key enzyme in the calcification pathway. In the short-term experiment, net calcification rates did not significantly change with pH, although they were highly variable in the low pH treatment, including some genotypes that maintained positive net calcification in undersaturated conditions. In the 6-month experiment, average net calcification was significantly reduced at low pH, with corals exhibiting net dissolution of skeleton. However, one of the same genotypes that maintained positive net calcification (+0.04% day−1) under the low pH treatment in the short-term experiment also maintained positive net calcification longer than the other genotypes in the long-term experiment, although none of the corals maintained positive calcification for the entire 6 months. Average carbonic anhydrase activity was not affected by pH, although some genotypes exhibited small, insignificant, increases in activity after the sixth month. Our results suggest that while net calcification in L. pertusa is adversely affected by ocean acidification in the long term, it is possible that some genotypes may ... |
format |
Article in Journal/Newspaper |
author |
Melissa D. Kurman Carlos E. Gómez Samuel E. Georgian Jay J. Lunden Erik E. Cordes |
author_facet |
Melissa D. Kurman Carlos E. Gómez Samuel E. Georgian Jay J. Lunden Erik E. Cordes |
author_sort |
Melissa D. Kurman |
title |
Intra-Specific Variation Reveals Potential for Adaptation to Ocean Acidification in a Cold-Water Coral from the Gulf of Mexico |
title_short |
Intra-Specific Variation Reveals Potential for Adaptation to Ocean Acidification in a Cold-Water Coral from the Gulf of Mexico |
title_full |
Intra-Specific Variation Reveals Potential for Adaptation to Ocean Acidification in a Cold-Water Coral from the Gulf of Mexico |
title_fullStr |
Intra-Specific Variation Reveals Potential for Adaptation to Ocean Acidification in a Cold-Water Coral from the Gulf of Mexico |
title_full_unstemmed |
Intra-Specific Variation Reveals Potential for Adaptation to Ocean Acidification in a Cold-Water Coral from the Gulf of Mexico |
title_sort |
intra-specific variation reveals potential for adaptation to ocean acidification in a cold-water coral from the gulf of mexico |
publisher |
Frontiers Media S.A. |
publishDate |
2017 |
url |
https://doi.org/10.3389/fmars.2017.00111 https://doaj.org/article/63a39093d4104575823d9771a127c755 |
genre |
Lophelia pertusa Ocean acidification |
genre_facet |
Lophelia pertusa Ocean acidification |
op_source |
Frontiers in Marine Science, Vol 4 (2017) |
op_relation |
http://journal.frontiersin.org/article/10.3389/fmars.2017.00111/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2017.00111 https://doaj.org/article/63a39093d4104575823d9771a127c755 |
op_doi |
https://doi.org/10.3389/fmars.2017.00111 |
container_title |
Frontiers in Marine Science |
container_volume |
4 |
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1766064526869921792 |