FN Archimer Export Format
PT J
TI Carbon and Nitrogen Acquisition in Shallow and Deep Holobionts of the Scleractinian Coral S. pistillata
BT 
AF EZZAT, Leila
   FINE, Maoz
   MAGUER, Jean-Francois
   GROVER, Renaud
   FERRIER-PAGES, Christine
AS 1:1;2:2,3;3:4;4:1;5:1;
FF 1:;2:;3:;4:;5:;
C1 Marine Department, Scientific Centre of Monaco, Monaco, Monaco
   The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, Israel
   The Interuniversity Institute for Marine Sciences, Eilat, Israel
   Laboratoire de l'Environnement Marin, UMR 6539, UBO/Centre Nationnal de la Recherche Scientifique/IRD/IFREMER, Institut Universitaire Européen de la Mer, Plouzané, France
C2 CENTRE SCI MONACO, MONACO
   UNIV BAR ILAN, ISRAEL
   INTERUNIV INST MARINE SCI EILAT, ISRAEL
   UBO, FRANCE
UM LEMAR
IN DOAJ
IF 5.247
TC 41
UR https://archimer.ifremer.fr/doc/00602/71414/69897.pdf
   https://archimer.ifremer.fr/doc/00602/71414/69898.pdf
LA English
DT Article
DE ;light acclimation;carbon isotopes;nitrogen isotopes;clades;nitrate;ammonium;scleractinian coral;mesophotic coral
AB Reef building corals can host different symbiont genotypes (clades), and form distinct holobionts in response to environmental changes. Studies on the functional significance of genetically different symbionts have focused on the thermal tolerance rather than on the nutritional significance. Here, we characterized the nitrogen and carbon assimilation rates, the allocation patterns of these nutrients within the symbiosis, and the trophic condition of two distinct holobionts of Stylophora pistillata: one associated with Symbiodinium Glade A in shallow reefs and the other one associated with Glade C in mesophotic reefs. The main findings are that: (1) Glade C-symbionts have a competitive advantage for the acquisition of carbon at low irradiance compared to Glade A-symbionts: (2) light is however the primary factor that determines the positive relationship between the amount of carbon fixed in photosynthesis by the symbionts and the amount of carbon translocated to the host; and (3) by contrast, the dominant Symbiodinium type preferentially determines a negative relationship between rates of coral feeding and nitrogen assimilation, although light still plays a relevant role in this relationship. Clade C-holobionts had indeed higher heterotrophic capacities, but lower inorganic nitrogen assimilation rates than clade A-holobionts, at all light levels. Broadly, our results show that the assimilation and translocation rates of inorganic carbon and nitrogen are Glade and light -dependent. In addition, the capacity of S. pistillata to form mesophotic reefs in the Red Sea relies on its ability to select Symbiodinium Glade C, as this symbiont type is more efficient to fix carbon at low light. 
PY 2017
SO Frontiers In Marine Science
SN 2296-7745
VL 4
IS 102
UT 000457690600102
DI 10.3389/fmars.2017.00102
ID 71414
ER

EF