FN Archimer Export Format
PT J
TI Divergent Capacity of Scleractinian and Soft Corals to Assimilate and Transfer Diazotrophically Derived Nitrogen to the Reef Environment
BT 
AF PUPIER, Chloe A.
   BEDNARZ, Vanessa N.
   GROVER, Renaud
   FINE, Maoz
   MAGUER, Jean-Francois
   FERRIER-PAGES, Christine
AS 1:1,2;2:1;3:1;4:3,4;5:5;6:1;
FF 1:;2:;3:;4:;5:;6:;
C1 Ctr Sci Monaco, Marine Dept, Monaco, Monaco.
   Sorbonne Univ, Coll Doctoral, Paris, France.
   Bar Ilan Univ, Mina & Everard Goodman Fac Life Sci, Ramat Gan, Israel.
   Interuniv Inst Marine Sci Eilat, Elat, Israel.
   UBO, Inst Univ Europeen Mer, UMR 6539, CNRS,IRD,IFREMER,Lab Environm Marin LEMAR, Plouzane, France.
C2 CTR SCI MONACO, MONACO
   UNIV PARIS 06, FRANCE
   UNIV BAR ILAN, ISRAEL
   INTERUNIV INST MARINE SCI EILAT, ISRAEL
   UBO, FRANCE
UM LEMAR
IN WOS Cotutelle UMR
   DOAJ
   copubli-france
   copubli-univ-france
   copubli-int-hors-europe
IF 4.235
TC 9
UR https://archimer.ifremer.fr/doc/00512/62370/66644.pdf
LA English
DT Article
DE ;dinitrogen fixation;diazotrophs;scleractinian corals;soft corals;Red Sea
AB Corals are associated with dinitrogen (N-2)-fixing bacteria that potentially represent an additional nitrogen (N) source for the coral holobiont in oligotrophic reef environments. Nevertheless, the few studies investigating the assimilation of diazotrophically derived nitrogen (DDN) by tropical corals are limited to a single scleractinian species (i.e., Stylophora pistillata). The present study quantified DDN assimilation rates in four scleractinian and three soft coral species from the shallow waters of the oligotrophic Northern Red Sea using the N-15(2) tracer technique. All scleractinian species significantly stimulated N, fixation in the coral-surrounding seawater (and mucus) and assimilated DDN into their tissue. Interestingly, N-2 fixation was not detected in the tissue and surrounding seawater of soft corals, despite the fact that soft corals were able to take up DDN from a culture of free-living diazotrophs. Soft coral mucus likely represents an unfavorable habitat for the colonization and activity of diazotrophs as it contains a low amount of particulate organic matter, with a relatively high N content, compared to the mucus of scleractinian corals. In addition, it is known to present antimicrobial properties. Overall, this study suggests that DDN assimilation into coral tissues depends on the presence of active diazotrophs in the coral's mucus layer and/or surrounding seawater. Since N is often a limiting nutrient for primary productivity in oligotrophic reef waters, the divergent capacity of scleractinian and soft corals to promote N-2 fixation may have implications for N availability and reef biogeochemistry in scleractinian versus soft coral-dominated reefs. 
PY 2019
PD AUG
SO Frontiers In Microbiology
SN 1664-302X
PU Frontiers Media Sa
VL 10
IS 1860
UT 000480707500002
DI 10.3389/fmicb.2019.01860
ID 62370
ER

EF