Publications des scientifiques de l'IRD

Benavides M., Houlbrèque Fanny, Camps M., Lorrain Anne, Grosso O., Bonnet Sophie. (2016). Diazotrophs : a non-negligible source of nitrogen for the tropical coral Stylophora pistillata. Journal of Experimental Biology, 219 (17), p. 2608-2612. ISSN 0022-0949.

Titre du document
Diazotrophs : a non-negligible source of nitrogen for the tropical coral Stylophora pistillata
Année de publication
2016
Type de document
Article référencé dans le Web of Science WOS:000384249800010
Auteurs
Benavides M., Houlbrèque Fanny, Camps M., Lorrain Anne, Grosso O., Bonnet Sophie
Source
Journal of Experimental Biology, 2016, 219 (17), p. 2608-2612 ISSN 0022-0949
Corals aremixotrophs: they are able to fix inorganic carbon through the activity of their symbiotic dinoflagellates and to gain nitrogen from predation on plankton and uptake of dissolved organic and inorganic nutrients. They also live in close association with diverse diazotrophic communities, inhabiting their skeleton, tissue and mucus layer, which are able to fix dinitrogen (N-2). The quantity of fixed N-2 transferred to the corals and its distribution within coral compartments as well as the quantity of nitrogen assimilated through the ingestion of planktonic diazotrophs are still unknown. Here, we quantified nitrogen assimilation via (i) N-2 fixation by symbiont diazotrophs, (ii) ingestion of cultured unicellular diazotrophs and (iii) ingestion of natural planktonic diazotrophs. We estimate that the ingestion of diazotrophs provides 0.76 Alpha +/- 0.15 mu g N cm(-2) h(-1), suggesting that diazotrophs represent a non-negligible source of nitrogen for scleractinian corals.
Plan de classement
Limnologie biologique / Océanographie biologique [034]
Description Géographique
NOUVELLE CALEDONIE ; ZONE TROPICALE
Localisation
Fonds IRD [F B010068211]
Identifiant IRD
fdi:010068211
Contact