FN Archimer Export Format
PT J
TI Corals adapted to extreme and fluctuating seawater pH increase calcification rates and have unique symbiont communities
BT 
AF TANVET, Clement
   Camp, Emma F.
   SUTTON, Jill
   Houlbrèque, Fanny
   THOUZEAU, Gerard
   Rodolfo-Metalpa, Roccardo
AS 1:1,2,3;2:4;3:2;4:1,3;5:2;6:1,3;
FF 1:;2:;3:;4:;5:;6:;
C1 Centre IRD Nouméa, UMR ENTROPIE (IRD, Université de la Réunion, Université de la Nouvelle-Calédonie, Ifremer), Nouméa, New Caledonia
   Univ Brest, CNRS, IRD, Ifremer, LEMAR, Plouzané, France
   Labex ICONA, International CO2 Natural Analogues Network, Shimoda, Japan
   Climate Change Cluster, University of Technology Sydney, Ultimo, New South Wales, Australia
C2 IRD, FRANCE
   UBO, FRANCE
   LABEX ICONA, JAPAN
   UNIV TECH SYDNEY, AUSTRALIA
UM LEMAR
   ENTROPIE
IN WOS Cotutelle UMR
   DOAJ
   copubli-france
   copubli-univ-france
   copubli-int-hors-europe
IF 2.6
TC 4
UR https://archimer.ifremer.fr/doc/00840/95149/102846.pdf
   https://archimer.ifremer.fr/doc/00840/95149/102847.docx
LA English
DT Article
DE ;adaptation;Bourake;calcification;coral;natural analogue;New Caledonia;ocean acidification;physiology;Symbiodiniaceae
AB 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. 
PY 2023
PD MAY
SO Ecology And Evolution
SN 2045-7758
PU Wiley Open Access
VL 13
IS 5
UT 000998314500001
DI 10.1002/ece3.10099
ID 95149
ER

EF