Corals adapted to extreme and fluctuating seawater pH increase calcification rates and have unique symbiont communities
Ocean acidification (OA) is a severe threat to coral reefs mainly by reducing their calcification rate. Identifying the resilience factors of corals to decreasing seawater pH is of paramount importance to predict the survivability of coral reefs in the future. This study compared corals adapted to v...
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ftird:oai:ird.fr:fdi:010088099 2024-09-15T18:28:04+00:00 Corals adapted to extreme and fluctuating seawater pH increase calcification rates and have unique symbiont communities Tanvet, C. Camp, E. F. Sutton, J. /Houlbrèque, Fanny Thouzeau, G. /Rodolfo-Metalpa, Riccardo NOUVELLE CALEDONIE 2023 https://www.documentation.ird.fr/hor/fdi:010088099 EN eng https://www.documentation.ird.fr/hor/fdi:010088099 oai:ird.fr:fdi:010088099 Tanvet C., Camp E. F., Sutton J., Houlbrèque Fanny, Thouzeau G., Rodolfo-Metalpa Riccardo. Corals adapted to extreme and fluctuating seawater pH increase calcification rates and have unique symbiont communities. 2023, 13 (5), p. e10099 [21 p.] adaptation Bourake calcification coral natural analogue New Caledonia ocean acidification physiology Symbiodiniaceae text 2023 ftird 2024-08-15T05:57:40Z Ocean acidification (OA) is a severe threat to coral reefs mainly by reducing their calcification rate. Identifying the resilience factors of corals to decreasing seawater pH is of paramount importance to predict the survivability of coral reefs in the future. This study compared corals adapted to variable pH(T) (i.e., 7.23-8.06) from the semi-enclosed lagoon of Bourake, New Caledonia, to corals adapted to more stable seawater pH(T) (i.e., 7.90-8.18). In a 100-day aquarium experiment, we examined the physiological response and genetic diversity of Symbiodiniaceae from three coral species (Acropora tenuis, Montipora digitata, and Porites sp.) from both sites under three stable pH(NBS) conditions (8.11, 7.76, 7.54) and one fluctuating pH(NBS) regime (between 7.56 and 8.07). Bourake corals consistently exhibited higher growth rates than corals from the stable pH environment. Interestingly, A. tenuis from Bourake showed the highest growth rate under the 7.76 pH(NBS) condition, whereas for M. digitata, and Porites sp. from Bourake, growth was highest under the fluctuating regime and the 8.11 pH(NBS) conditions, respectively. While OA generally decreased coral calcification by ca. 16%, Bourake corals showed higher growth rates than corals from the stable pH environment (21% increase for A. tenuis to 93% for M. digitata, with all pH conditions pooled). This superior performance coincided with divergent symbiont communities that were more homogenous for Bourake corals. Corals adapted to variable pH conditions appear to have a better capacity to calcify under reduced pH compared to corals native to more stable pH condition. This response was not gained by corals from the more stable environment exposed to variable pH during the 100-day experiment, suggesting that long-term exposure to pH fluctuations and/or differences in symbiont communities benefit calcification under OA. Text Ocean acidification IRD (Institute de recherche pour le développement): Horizon |
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Open Polar |
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IRD (Institute de recherche pour le développement): Horizon |
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language |
English |
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adaptation Bourake calcification coral natural analogue New Caledonia ocean acidification physiology Symbiodiniaceae |
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adaptation Bourake calcification coral natural analogue New Caledonia ocean acidification physiology Symbiodiniaceae Tanvet, C. Camp, E. F. Sutton, J. /Houlbrèque, Fanny Thouzeau, G. /Rodolfo-Metalpa, Riccardo Corals adapted to extreme and fluctuating seawater pH increase calcification rates and have unique symbiont communities |
topic_facet |
adaptation Bourake calcification coral natural analogue New Caledonia ocean acidification physiology Symbiodiniaceae |
description |
Ocean acidification (OA) is a severe threat to coral reefs mainly by reducing their calcification rate. Identifying the resilience factors of corals to decreasing seawater pH is of paramount importance to predict the survivability of coral reefs in the future. This study compared corals adapted to variable pH(T) (i.e., 7.23-8.06) from the semi-enclosed lagoon of Bourake, New Caledonia, to corals adapted to more stable seawater pH(T) (i.e., 7.90-8.18). In a 100-day aquarium experiment, we examined the physiological response and genetic diversity of Symbiodiniaceae from three coral species (Acropora tenuis, Montipora digitata, and Porites sp.) from both sites under three stable pH(NBS) conditions (8.11, 7.76, 7.54) and one fluctuating pH(NBS) regime (between 7.56 and 8.07). Bourake corals consistently exhibited higher growth rates than corals from the stable pH environment. Interestingly, A. tenuis from Bourake showed the highest growth rate under the 7.76 pH(NBS) condition, whereas for M. digitata, and Porites sp. from Bourake, growth was highest under the fluctuating regime and the 8.11 pH(NBS) conditions, respectively. While OA generally decreased coral calcification by ca. 16%, Bourake corals showed higher growth rates than corals from the stable pH environment (21% increase for A. tenuis to 93% for M. digitata, with all pH conditions pooled). This superior performance coincided with divergent symbiont communities that were more homogenous for Bourake corals. Corals adapted to variable pH conditions appear to have a better capacity to calcify under reduced pH compared to corals native to more stable pH condition. This response was not gained by corals from the more stable environment exposed to variable pH during the 100-day experiment, suggesting that long-term exposure to pH fluctuations and/or differences in symbiont communities benefit calcification under OA. |
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Text |
author |
Tanvet, C. Camp, E. F. Sutton, J. /Houlbrèque, Fanny Thouzeau, G. /Rodolfo-Metalpa, Riccardo |
author_facet |
Tanvet, C. Camp, E. F. Sutton, J. /Houlbrèque, Fanny Thouzeau, G. /Rodolfo-Metalpa, Riccardo |
author_sort |
Tanvet, C. |
title |
Corals adapted to extreme and fluctuating seawater pH increase calcification rates and have unique symbiont communities |
title_short |
Corals adapted to extreme and fluctuating seawater pH increase calcification rates and have unique symbiont communities |
title_full |
Corals adapted to extreme and fluctuating seawater pH increase calcification rates and have unique symbiont communities |
title_fullStr |
Corals adapted to extreme and fluctuating seawater pH increase calcification rates and have unique symbiont communities |
title_full_unstemmed |
Corals adapted to extreme and fluctuating seawater pH increase calcification rates and have unique symbiont communities |
title_sort |
corals adapted to extreme and fluctuating seawater ph increase calcification rates and have unique symbiont communities |
publishDate |
2023 |
url |
https://www.documentation.ird.fr/hor/fdi:010088099 |
op_coverage |
NOUVELLE CALEDONIE |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
https://www.documentation.ird.fr/hor/fdi:010088099 oai:ird.fr:fdi:010088099 Tanvet C., Camp E. F., Sutton J., Houlbrèque Fanny, Thouzeau G., Rodolfo-Metalpa Riccardo. Corals adapted to extreme and fluctuating seawater pH increase calcification rates and have unique symbiont communities. 2023, 13 (5), p. e10099 [21 p.] |
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