Horizon / Plein textes La base de ressources documentaires de l'IRD

IRD

 

Publications des scientifiques de l'IRD

Biscere T., Rodolfo-Metalpa Riccardo, Lorrain Anne, Chauvaud L., Thebault J., Clavier J., Houlbrèque Fanny. (2015). Responses of two scleractinian corals to cobalt pollution and ocean acidification. Plos One, 10 (4), e0122898 [18 p.]. ISSN 1932-6203

Fichier PDF disponiblehttp://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers16-04/010064138.pdf[ PDF Link ]

Lien direct chez l'éditeur doi:10.1371/journal.pone.0122898

Titre
Responses of two scleractinian corals to cobalt pollution and ocean acidification
Année de publication2015
Type de documentArticle référencé dans le Web of Science WOS:000352477800170
AuteursBiscere T., Rodolfo-Metalpa Riccardo, Lorrain Anne, Chauvaud L., Thebault J., Clavier J., Houlbrèque Fanny.
SourcePlos One, 2015, 10 (4), p. e0122898 [18 p.]. p. e0122898 [18 p.] ISSN 1932-6203
RésuméThe effects of ocean acidification alone or in combination with warming on coral metabolism have been extensively investigated, whereas none of these studies consider that most coral reefs near shore are already impacted by other natural anthropogenic inputs such as metal pollution. It is likely that projected ocean acidification levels will aggravate coral reef health. We first investigated how ocean acidification interacts with one near shore locally abundant metal on the physiology of two major reef-building corals: Stylophora pistillata and Acropora muricata. Two pH levels (pH(T) 8.02; pCO(2) 366 mu atm and pH(T) 7.75; pCO(2) 1140 mu atm) and two cobalt concentrations (natural, 0.03 mu g L-1 and polluted, 0.2 mu g L-1) were tested during five weeks in aquaria. We found that, for both species, cobalt input decreased significantly their growth rates by 28% while it stimulated their photosystem II, with higher values of rETR(max) (relative Electron Transport Rate). Elevated pCO(2) levels acted differently on the coral rETR(max) values and did not affect their growth rates. No consistent interaction was found between pCO(2) levels and cobalt concentrations. We also measured in situ the effect of higher cobalt concentrations (1.06 +/- 0.16 mu g L-1) on A. muricata using benthic chamber experiments. At this elevated concentration, cobalt decreased simultaneously coral growth and photosynthetic rates, indicating that the toxic threshold for this pollutant has been reached for both host cells and zooxanthellae. Our results from both aquaria and in situ experiments, suggest that these coral species are not particularly sensitive to high pCO(2) conditions but they are to ecologically relevant cobalt concentrations. Our study reveals that some reefs may be yet subjected to deleterious pollution levels, and even if no interaction between pCO(2) levels and cobalt concentration has been found, it is likely that coral metabolism will be weakened if they are subjected to additional threats such as temperature increase, other heavy metals, and eutrophication.
Plan de classementPollution [038] ; Ecologie, systèmes aquatiques [036]
Descr. géo.NOUVELLE CALEDONIE
LocalisationFonds IRD [F B010064138]
Identifiant IRDfdi:010064138
Lien permanenthttp://www.documentation.ird.fr/hor/fdi:010064138

Export des données

Disponibilité des documents

Télechargment fichier PDF téléchargeable

Lien sur le Web lien chez l'éditeur

Accès réservé en accès réservé

HAL en libre accès sur HAL


* PDF Link :

    à télécharger pour citer/partager ce document sur les réseaux sociaux académiques


Accès aux documents originaux :

Le FDI est labellisé CollEx

Accès direct

Bureau du chercheur

Site de la documentation

Espace intranet IST (accès réservé)

Suivi des publications IRD (accès réservé)

Mentions légales

Services Horizon

Poser une question

Consulter l'aide en ligne

Déposer une publication (accès réservé)

S'abonner au flux RSS

Voir les tableaux chronologiques et thématiques

Centres de documentation

Bondy

Montpellier (centre IRD)

Montpellier (MSE)

Cayenne

Nouméa

Papeete

Abidjan

Dakar

Niamey

Ouagadougou

Tunis

La Paz

Quito