Preprints
https://doi.org/10.5194/egusphere-2022-240
https://doi.org/10.5194/egusphere-2022-240
 
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16 Jun 2022
16 Jun 2022

Early life stages of a Mediterranean coral are vulnerable to ocean warming and acidification

Chloe Carbonne1, Steeve Comeau1, Phoebe T. W. Chan1, Keyla Plichon1,2, Jean-Pierre Gattuso1,3, and Núria Teixidó1,4 Chloe Carbonne et al.
  • 1Sorbonne Université, CNRS, Laboratoire d’Océanographie de Villefranche, 181 chemin du Lazaret, 06230 Villefranche-sur-mer, France
  • 2MSc MARRES, Université Côte d’Azur, Sophia Antipolis Campus, 06103 Nice, France
  • 3Institute for Sustainable Development and International Relations, Sciences Po, 27 rue Saint Guillaume, F-75007 Paris, France
  • 4Stazione Zoologica Anton Dohrn, Ischia Marine Centre, Department of Integrated Marine Ecology, Punta San Pietro, 80077, Ischia (Naples), Italy

Abstract. The ability of coral populations to recover from disturbance depends on larval dispersion and recruitment. While ocean warming and acidification effects on adult corals are well documented, information on early life stages is comparatively scarce. Here, we investigate whether ocean warming and acidification can affect the larval and juvenile development of the Mediterranean azooxanthellate coral Astroides calycularis. Larvae and juveniles were raised for 9 months at ambient (23 °C) and warm (26 °C) temperatures and ambient (8.0) and low pH (7.7, on the total scale). The timing of the larvae metamorphosis, growth of the juvenile polyp, and skeletal characteristics of the 9-month-old polyps were monitored. Settlement and metamorphosis were more successful and hastened under a warm temperature. In contrast, low pH delayed the metamorphosis and affected growth of the recruits by reducing the calcified area of attachment to the substrate, as well as by diminishing the skeleton volume and the number of septa. However, skeleton density was higher under low pH and ambient temperature. The warm temperature and low pH treatment had a negative impact on the survival, settlement, and growth of recruits. This study provides evidence of the threat that represents ocean warming and acidification for the larval recruitment and the growth of recruits of A. calycularis.

Journal article(s) based on this preprint

12 Oct 2022
| Highlight paper
Early life stages of a Mediterranean coral are vulnerable to ocean warming and acidification
Chloe Carbonne, Steeve Comeau, Phoebe T. W. Chan, Keyla Plichon, Jean-Pierre Gattuso, and Núria Teixidó
Biogeosciences, 19, 4767–4777, https://doi.org/10.5194/bg-19-4767-2022,https://doi.org/10.5194/bg-19-4767-2022, 2022
Short summary

Chloe Carbonne et al.

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2022-240', Anonymous Referee #1, 12 Jul 2022
    • AC1: 'Reply on RC1', Chloe Carbonne, 02 Aug 2022
  • RC2: 'Comment on egusphere-2022-240', Anonymous Referee #2, 18 Jul 2022
    • AC2: 'Reply on RC2', Chloe Carbonne, 02 Aug 2022

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2022-240', Anonymous Referee #1, 12 Jul 2022
    • AC1: 'Reply on RC1', Chloe Carbonne, 02 Aug 2022
  • RC2: 'Comment on egusphere-2022-240', Anonymous Referee #2, 18 Jul 2022
    • AC2: 'Reply on RC2', Chloe Carbonne, 02 Aug 2022

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision
ED: Publish subject to minor revisions (review by editor) (10 Aug 2022) by Andrew Thurber
AR by Chloe Carbonne on behalf of the Authors (10 Aug 2022)  Author's response    Author's tracked changes    Manuscript
ED: Publish as is (12 Aug 2022) by Andrew Thurber

Journal article(s) based on this preprint

12 Oct 2022
| Highlight paper
Early life stages of a Mediterranean coral are vulnerable to ocean warming and acidification
Chloe Carbonne, Steeve Comeau, Phoebe T. W. Chan, Keyla Plichon, Jean-Pierre Gattuso, and Núria Teixidó
Biogeosciences, 19, 4767–4777, https://doi.org/10.5194/bg-19-4767-2022,https://doi.org/10.5194/bg-19-4767-2022, 2022
Short summary

Chloe Carbonne et al.

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The requested preprint has a corresponding peer-reviewed final revised paper. You are encouraged to refer to the final revised version.

Carbonne et al. identified the concurrent impact of Ocean Acidification as well as ocean warming on larval survivorship of corals. The study focuses on more temperate corals and also demonstrates the impact of lowered ocean pH on larval settlement and growth afterwards. This nicely designed experiment and the conclusive results advance our understanding of human's biogeochemical footprint on important taxa in marine systems.
Short summary
For the first time, our study highlights the synergistic and additive effects a 9-month warming and acidification combined stress on the early life stages of a Mediterranean azooxanthellate coral, Astroides calycularis. Our results predict a decrease of dispersion, settlement, post-settlement growth and survival under future global change and that larvae and recruits of A. calycularis are stages of interest for this Mediterranean coral resistance, resilience and conservation.