Responses of branching reef corals Acropora digitifera and Montipora digitata to elevated temperature and pCO 2
Anthropogenic emission of CO 2 into the atmosphere has been increasing exponentially, causing ocean acidification (OA) and ocean warming (OW). The “business-as-usual” scenario predicts that the atmospheric concentration of CO 2 may exceed 1,000 µatm and seawater temperature may increase by up to 3 °...
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crpeerj:10.7717/peerj.10562 2024-09-15T18:28:20+00:00 Responses of branching reef corals Acropora digitifera and Montipora digitata to elevated temperature and pCO 2 Manullang, Cristiana Millyaningrum, Intan Herwindra Iguchi, Akira Miyagi, Aika Tanaka, Yasuaki Nojiri, Yukihiro Sakai, Kazuhiko Japan Society for the Promotion of Science Environment Research and Technology Development Fund University of the Ryukyus President’s Research Award for Leading Scientists 2020 http://dx.doi.org/10.7717/peerj.10562 https://peerj.com/articles/10562.pdf https://peerj.com/articles/10562.xml https://peerj.com/articles/10562.html en eng PeerJ https://creativecommons.org/licenses/by/4.0/ PeerJ volume 8, page e10562 ISSN 2167-8359 journal-article 2020 crpeerj https://doi.org/10.7717/peerj.10562 2024-07-30T04:13:45Z Anthropogenic emission of CO 2 into the atmosphere has been increasing exponentially, causing ocean acidification (OA) and ocean warming (OW). The “business-as-usual” scenario predicts that the atmospheric concentration of CO 2 may exceed 1,000 µatm and seawater temperature may increase by up to 3 °C by the end of the 21 st century. Increases in OA and OW may negatively affect the growth and survival of reef corals. In the present study, we separately examined the effects of OW and OA on the corals Acropora digitifera and Montipora digitata , which are dominant coral species occurring along the Ryukyu Archipelago, Japan, at three temperatures (28 °C, 30 °C, and 32 °C) and following four pCO 2 treatments (400, 600, 800, and 1,000 µatm) in aquarium experiments. In the OW experiment, the calcification rate ( p = 0.02), endosymbiont density, and maximum photosynthetic efficiency ( Fv/Fm ) (both p < 0.0001) decreased significantly at the highest temperature (32 °C) compared to those at the lower temperatures (28 °C and 30 °C) in both species. In the OA experiment, the calcification rate decreased significantly as pCO 2 increased ( p < 0.0001), whereas endosymbiont density, chlorophyll content, and Fv/Fm were not affected. The calcification rate of A. digitifera showed greater decreases from 30 °C to 32 °C than that of M. digitata . The calcification of the two species responded differently to OW and OA. These results suggest that A. digitifera is more sensitive to OW than M. digitata , whereas M. digitata is more sensitive to OA. Thus, differences in the sensitivity of the two coral species to OW and OA might be attributed to differences in the endosymbiont species and high calcification rates, respectively. Article in Journal/Newspaper Ocean acidification PeerJ Publishing PeerJ 8 e10562 |
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crpeerj |
language |
English |
description |
Anthropogenic emission of CO 2 into the atmosphere has been increasing exponentially, causing ocean acidification (OA) and ocean warming (OW). The “business-as-usual” scenario predicts that the atmospheric concentration of CO 2 may exceed 1,000 µatm and seawater temperature may increase by up to 3 °C by the end of the 21 st century. Increases in OA and OW may negatively affect the growth and survival of reef corals. In the present study, we separately examined the effects of OW and OA on the corals Acropora digitifera and Montipora digitata , which are dominant coral species occurring along the Ryukyu Archipelago, Japan, at three temperatures (28 °C, 30 °C, and 32 °C) and following four pCO 2 treatments (400, 600, 800, and 1,000 µatm) in aquarium experiments. In the OW experiment, the calcification rate ( p = 0.02), endosymbiont density, and maximum photosynthetic efficiency ( Fv/Fm ) (both p < 0.0001) decreased significantly at the highest temperature (32 °C) compared to those at the lower temperatures (28 °C and 30 °C) in both species. In the OA experiment, the calcification rate decreased significantly as pCO 2 increased ( p < 0.0001), whereas endosymbiont density, chlorophyll content, and Fv/Fm were not affected. The calcification rate of A. digitifera showed greater decreases from 30 °C to 32 °C than that of M. digitata . The calcification of the two species responded differently to OW and OA. These results suggest that A. digitifera is more sensitive to OW than M. digitata , whereas M. digitata is more sensitive to OA. Thus, differences in the sensitivity of the two coral species to OW and OA might be attributed to differences in the endosymbiont species and high calcification rates, respectively. |
author2 |
Japan Society for the Promotion of Science Environment Research and Technology Development Fund University of the Ryukyus President’s Research Award for Leading Scientists |
format |
Article in Journal/Newspaper |
author |
Manullang, Cristiana Millyaningrum, Intan Herwindra Iguchi, Akira Miyagi, Aika Tanaka, Yasuaki Nojiri, Yukihiro Sakai, Kazuhiko |
spellingShingle |
Manullang, Cristiana Millyaningrum, Intan Herwindra Iguchi, Akira Miyagi, Aika Tanaka, Yasuaki Nojiri, Yukihiro Sakai, Kazuhiko Responses of branching reef corals Acropora digitifera and Montipora digitata to elevated temperature and pCO 2 |
author_facet |
Manullang, Cristiana Millyaningrum, Intan Herwindra Iguchi, Akira Miyagi, Aika Tanaka, Yasuaki Nojiri, Yukihiro Sakai, Kazuhiko |
author_sort |
Manullang, Cristiana |
title |
Responses of branching reef corals Acropora digitifera and Montipora digitata to elevated temperature and pCO 2 |
title_short |
Responses of branching reef corals Acropora digitifera and Montipora digitata to elevated temperature and pCO 2 |
title_full |
Responses of branching reef corals Acropora digitifera and Montipora digitata to elevated temperature and pCO 2 |
title_fullStr |
Responses of branching reef corals Acropora digitifera and Montipora digitata to elevated temperature and pCO 2 |
title_full_unstemmed |
Responses of branching reef corals Acropora digitifera and Montipora digitata to elevated temperature and pCO 2 |
title_sort |
responses of branching reef corals acropora digitifera and montipora digitata to elevated temperature and pco 2 |
publisher |
PeerJ |
publishDate |
2020 |
url |
http://dx.doi.org/10.7717/peerj.10562 https://peerj.com/articles/10562.pdf https://peerj.com/articles/10562.xml https://peerj.com/articles/10562.html |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
PeerJ volume 8, page e10562 ISSN 2167-8359 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.7717/peerj.10562 |
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PeerJ |
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8 |
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e10562 |
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1810469685419835392 |