Effects of low pH and feeding on calcification rates of the cold-water coral Desmophyllum dianthus
Cold-Water Corals (CWCs), and most marine calcifiers, are especially threatened by ocean acidification (OA) and the decrease in the carbonate saturation state of seawater. The vulnerability of these organisms, however, also involves other global stressors like warming, deoxygenation or changes in se...
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ftpubmed:oai:pubmedcentral.nih.gov:6942680 2023-05-15T17:51:47+02:00 Effects of low pH and feeding on calcification rates of the cold-water coral Desmophyllum dianthus Martínez-Dios, Ariadna Pelejero, Carles López-Sanz, Àngel Sherrell, Robert M. Ko, Stanley Häussermann, Verena Försterra, Günter Calvo, Eva 2020-01-02 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6942680/ https://doi.org/10.7717/peerj.8236 en eng PeerJ Inc. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6942680/ http://dx.doi.org/10.7717/peerj.8236 © 2020 Martínez-Dios et al. https://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited. CC-BY Marine Biology Text 2020 ftpubmed https://doi.org/10.7717/peerj.8236 2020-01-12T01:30:10Z Cold-Water Corals (CWCs), and most marine calcifiers, are especially threatened by ocean acidification (OA) and the decrease in the carbonate saturation state of seawater. The vulnerability of these organisms, however, also involves other global stressors like warming, deoxygenation or changes in sea surface productivity and, hence, food supply via the downward transport of organic matter to the deep ocean. This study examined the response of the CWC Desmophyllum dianthus to low pH under different feeding regimes through a long-term incubation experiment. For this experiment, 152 polyps were incubated at pH 8.1, 7.8, 7.5 and 7.2 and two feeding regimes for 14 months. Mean calcification rates over the entire duration of the experiment ranged between −0.3 and 0.3 mg CaCO(3) g(−1)d(−1). Polyps incubated at pH 7.2 were the most affected and 30% mortality was observed in this treatment. In addition, many of the surviving polyps at pH 7.2 showed negative calcification rates indicating that, in the long term, CWCs may have difficulty thriving in such aragonite undersaturated waters. The feeding regime had a significant effect on skeletal growth of corals, with high feeding frequency resulting in more positive and variable calcification rates. This was especially evident in corals reared at pH 7.5 (Ω(A) = 0.8) compared to the low frequency feeding treatment. Early life-stages, which are essential for the recruitment and maintenance of coral communities and their associated biodiversity, were revealed to be at highest risk. Overall, this study demonstrates the vulnerability of D. dianthus corals to low pH and low food availability. Future projected pH decreases and related changes in zooplankton communities may potentially compromise the viability of CWC populations. Text Ocean acidification PubMed Central (PMC) PeerJ 8 e8236 |
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PubMed Central (PMC) |
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English |
topic |
Marine Biology |
spellingShingle |
Marine Biology Martínez-Dios, Ariadna Pelejero, Carles López-Sanz, Àngel Sherrell, Robert M. Ko, Stanley Häussermann, Verena Försterra, Günter Calvo, Eva Effects of low pH and feeding on calcification rates of the cold-water coral Desmophyllum dianthus |
topic_facet |
Marine Biology |
description |
Cold-Water Corals (CWCs), and most marine calcifiers, are especially threatened by ocean acidification (OA) and the decrease in the carbonate saturation state of seawater. The vulnerability of these organisms, however, also involves other global stressors like warming, deoxygenation or changes in sea surface productivity and, hence, food supply via the downward transport of organic matter to the deep ocean. This study examined the response of the CWC Desmophyllum dianthus to low pH under different feeding regimes through a long-term incubation experiment. For this experiment, 152 polyps were incubated at pH 8.1, 7.8, 7.5 and 7.2 and two feeding regimes for 14 months. Mean calcification rates over the entire duration of the experiment ranged between −0.3 and 0.3 mg CaCO(3) g(−1)d(−1). Polyps incubated at pH 7.2 were the most affected and 30% mortality was observed in this treatment. In addition, many of the surviving polyps at pH 7.2 showed negative calcification rates indicating that, in the long term, CWCs may have difficulty thriving in such aragonite undersaturated waters. The feeding regime had a significant effect on skeletal growth of corals, with high feeding frequency resulting in more positive and variable calcification rates. This was especially evident in corals reared at pH 7.5 (Ω(A) = 0.8) compared to the low frequency feeding treatment. Early life-stages, which are essential for the recruitment and maintenance of coral communities and their associated biodiversity, were revealed to be at highest risk. Overall, this study demonstrates the vulnerability of D. dianthus corals to low pH and low food availability. Future projected pH decreases and related changes in zooplankton communities may potentially compromise the viability of CWC populations. |
format |
Text |
author |
Martínez-Dios, Ariadna Pelejero, Carles López-Sanz, Àngel Sherrell, Robert M. Ko, Stanley Häussermann, Verena Försterra, Günter Calvo, Eva |
author_facet |
Martínez-Dios, Ariadna Pelejero, Carles López-Sanz, Àngel Sherrell, Robert M. Ko, Stanley Häussermann, Verena Försterra, Günter Calvo, Eva |
author_sort |
Martínez-Dios, Ariadna |
title |
Effects of low pH and feeding on calcification rates of the cold-water coral Desmophyllum dianthus |
title_short |
Effects of low pH and feeding on calcification rates of the cold-water coral Desmophyllum dianthus |
title_full |
Effects of low pH and feeding on calcification rates of the cold-water coral Desmophyllum dianthus |
title_fullStr |
Effects of low pH and feeding on calcification rates of the cold-water coral Desmophyllum dianthus |
title_full_unstemmed |
Effects of low pH and feeding on calcification rates of the cold-water coral Desmophyllum dianthus |
title_sort |
effects of low ph and feeding on calcification rates of the cold-water coral desmophyllum dianthus |
publisher |
PeerJ Inc. |
publishDate |
2020 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6942680/ https://doi.org/10.7717/peerj.8236 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6942680/ http://dx.doi.org/10.7717/peerj.8236 |
op_rights |
© 2020 Martínez-Dios et al. https://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited. |
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CC-BY |
op_doi |
https://doi.org/10.7717/peerj.8236 |
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8 |
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e8236 |
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