Calcification responses of subtropical corals to ocean acidification: a case study from Sesoko Island, Okinawa, Japan

Bell, Tomoko; Manullang, Cristiana; Kumagai, Naoki H.; Sakai, Kazuhiko; Suzuki, Atsushi; Iguchi, Akira

doi:10.3755/galaxea.g2020_s2o

Cited by 5 publications

(3 citation statements)

References 46 publications

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“…These results are consistent with coral species-specific responses to OA with respect to calcification. Relatively small effects of OA on some coral species were previously observed in aquaria experiments (Bell et al, 2022;Comeau et al, 2013;Ries et al, 2009) and recently reviewed (Bove et al, 2020;Cornwall et al, 2021;Leung et al, 2022).…”

Section: Coral Potential Resilience To Ocean Acidification: What Do W...mentioning

confidence: 79%

Corals adapted to extreme and fluctuating seawater pH increase calcification rates and have unique symbiont communities

Tanvet¹,

Camp

Sutton³

et al. 2022

Preprint

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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 (i.e., 7.23-8.06 pH units) from the semi-enclosed lagoon of Bouraké, New Caledonia, to corals adapted to more stable seawater pH (i.e., 7.90-8.18 pH units). 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 conditions (i.e., 8.11, 7.76, 7.54 pH units) and fluctuating pH conditions (i.e., between 7.56 and 8.07 pH units). Bouraké corals consistently exhibited higher growth rates than corals from the stable pH environment, with specific ITS2 intragenomic variant profiles. While OA generally decreased coral calcification by ca. 16%, Bouraké coralsshowed higher growth rates (21 to 93% increase, depending on species with all pH conditions pooled) than those from the stable pH environment. This superior performance coincided with divergent ITS2-like profiles with better consistency for both variable and low pH conditions. This response was not gained by corals from the more stable environment exposed to variable pH during the four-month experiment, suggesting that such a kind of plasticity is time dependent. Future long-term experiments should address the exposure duration required to confer fitness benefits for sustained calcification, hopefully fast enough to cope with the ongoing rapid OA.

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Section: Coral Potential Resilience To Ocean Acidification: What Do W...mentioning

confidence: 79%

Corals adapted to extreme and fluctuating seawater pH increase calcification rates and have unique symbiont communities

Tanvet¹,

Camp

Sutton³

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…We observed species‐specific responses to OA on corals from Bouraké although almost always (with one exception, A. tenuis at variable pH) showed higher calcification rates than their counterpart originating from the reference and maintained at the control pH condition. The marginal effect of OA observed in corals from Bouraké has been observed on some other coral species (e.g., Pocillopora damicornis ; Porites cylindrica; Siderastrea siderea ) in previous aquaria experiments (Aichelman et al, 2021 ; Bell et al, 2022 ; Brown et al, 2022 ; Comeau et al, 2013 , 2019 ) and has recently been the subject of meta‐analysis and reviews (Bove et al, 2020 ; Leung et al, 2022 ).…”

Section: Discussionmentioning

confidence: 70%

“…Porites cylindrica; Siderastrea siderea) in previous aquaria experiments (Aichelman et al, 2021;Bell et al, 2022;Brown et al, 2022;Comeau et al, 2013Comeau et al, , 2019 and has recently been the subject of meta-analysis and reviews (Bove et al, 2020;Leung et al, 2022).…”

Section: Coral Potential Resilience To Ocean Acidification: What Do W...mentioning

confidence: 99%

Corals adapted to extreme and fluctuating seawater pH increase calcification rates and have unique symbiont communities

Tanvet

Camp

Sutton

et al. 2023

Ecology and Evolution

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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 pHT (i.e., 7.23–8.06) from the semi‐enclosed lagoon of Bouraké, New Caledonia, to corals adapted to more stable seawater pHT (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 pHNBS conditions (8.11, 7.76, 7.54) and one fluctuating pHNBS regime (between 7.56 and 8.07). Bouraké corals consistently exhibited higher growth rates than corals from the stable pH environment. Interestingly, A. tenuis from Bouraké showed the highest growth rate under the 7.76 pHNBS condition, whereas for M. digitata, and Porites sp. from Bouraké, growth was highest under the fluctuating regime and the 8.11 pHNBS conditions, respectively. While OA generally decreased coral calcification by ca. 16%, Bouraké 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 Bouraké 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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Intraspecific variation in response to elevated pCO2 and temperature in the branching reef coral Acropora digitifera from different habitats

Manullang,

Tarigan,

Iguchi

et al. 2024

Coral Reefs

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Calcification responses of subtropical corals to ocean acidification: a case study from Sesoko Island, Okinawa, Japan

Cited by 5 publications

References 46 publications

Corals adapted to extreme and fluctuating seawater pH increase calcification rates and have unique symbiont communities

Corals adapted to extreme and fluctuating seawater pH increase calcification rates and have unique symbiont communities

Corals adapted to extreme and fluctuating seawater pH increase calcification rates and have unique symbiont communities

Intraspecific variation in response to elevated pCO2 and temperature in the branching reef coral Acropora digitifera from different habitats

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