FN Archimer Export Format
PT J
TI The Bouraké semi- enclosed lagoon (New Caledonia). A natural laboratory to study the life-long adaptation of a coral reef ecosystem to climate change-like conditions
BT 
AF Maggioni, Federica
   Pujo-Pay, Mireille
   Aucan, Jérôme
   Cerrano, Carlo
   Calcinai, Barbara
   Payri, Claude
   Benzoni, Francesca
   Letourneur, Yves
   Rodolfo-Metalpa, Riccardo
AS 1:1;2:2;3:1;4:3;5:3;6:1;7:4;8:1;9:1;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;
C1 UMR ENTROPIE (UR-IRD-IFREMER-CNRS-UNC), Centre IRD, BP A5, 98848 Nouméa cedex, New Caledonia
   LOMIC, Laboratoire d’Océanographie Microbienne, Laboratoire Arago, Banyuls sur Mer, France
   Department of Life and Environmental Sciences (DiSVA), Polytechnic University of Marche, Ancona, Italy
   Red Sea Research Center, Division of Biological and Environmental Science and Engineering, King Abdullah University of Science and Technology, 23955-6900 Thuwal, Saudi Arabia
C2 IRD, FRANCE
   UNIV PARIS 06, FRANCE
   UNIV MARCHE, ITALY
   KAUST, SAUDI ARABIA
UM ENTROPIE
IN WOS Cotutelle UMR
   DOAJ
   copubli-france
   copubli-europe
   copubli-univ-france
   copubli-int-hors-europe
IF 5.092
TC 19
UR https://archimer.ifremer.fr/doc/00693/80480/83620.pdf
   https://archimer.ifremer.fr/doc/00693/80480/88498.pdf
   https://archimer.ifremer.fr/doc/00693/80480/88499.pdf
   https://archimer.ifremer.fr/doc/00693/80480/88500.pdf
LA English
DT Article
CR SUPERNATURAL
   SUPERNATURAL 2020
BO Alis
AB According to current experimental evidence, coral reefs could disappear within the century if CO2 emissions remain unabated. However, recent discoveries of diverse and high cover reefs that already thrive under extreme conditions seem to contradict these projections. Volcanic CO2 vents, semi-enclosed lagoons and mangrove estuaries are unique study sites where one or more ecologically relevant parameters for life in the oceans are close or even worse than currently projected for the year 2100. These natural analogues of future conditions hold new hope for the future of coral reefs and provide unique natural laboratories to explore how reef species could keep pace with climate change. To achieve this, it is essential to characterize their environment as a whole, and accurately consider all possible environmental factors that may differ from what is expected in the future and that may possibly alter the ecosystem response. In this study, we focus on the semi-enclosed lagoon of Bouraké (New Caledonia, SW Pacific Ocean) where a healthy reef ecosystem thrives in warm, acidified and deoxygenated water. We used a multi-scale approach to characterize the main physical-chemical parameters and mapped the benthic community composition (i.e., corals, sponges, and macroalgae). The data revealed that most physical and chemical parameters are regulated by the tide, strongly fluctuate 3 to 4 times a day, and are entirely predictable. The seawater pH and dissolved oxygen decrease during falling tide and reach extreme low values at low tide (7.2 pHT and 1.9 mg O2 L−1 at Bouraké, vs 7.9 pHT and 5.5 mg O2 L−1 at reference reefs). Dissolved oxygen, temperature, and pH fluctuates according to the tide of up to 4.91 mg O2 L−1, 6.50 °C, and 0.69 pHT units on a single day. Furthermore, the concentration of most of the chemical parameters was one- to 5-times higher at the Bouraké lagoon, particularly for organic and inorganic carbon and nitrogen, but also for some nutrients, notably silicates. Surprisingly, despite extreme environmental conditions and altered seawater chemical composition, our results reveal a diverse and high cover community of macroalgae, sponges and corals accounting for 28, 11 and 66 species, respectively. Both environmental variability and nutrient imbalance might contribute to their survival under such extreme environmental conditions. We describe the natural dynamics of the Bouraké ecosystem and its relevance as a natural laboratory to investigate the benthic organism’s adaptive responses to multiple stressors like future climate change conditions. 
PY 2021
PD SEP
SO Biogeosciences
SN 1726-4170
PU Copernicus GmbH
VL 18
IS 18
UT 000697323300001
BP 5117
EP 5140
DI 10.5194/bg-18-5117-2021
ID 80480
ER

EF