FN Archimer Export Format
PT J
TI Warm-adapted sponges resist thermal stress by reallocating carbon and nitrogen resources from cell turnover to somatic growth
BT 
AF Maggioni, Federica
   RAIMBAULT, Patrick
   Chateau, Olivier
   Pujo-Pay, Mireille
   Letourneur, Yves
   Rodolfo-Metalpa, Riccardo
AS 1:1;2:2;3:3;4:4;5:1;6:1;
FF 1:;2:;3:;4:;5:;6:;
C1 ENTROPIE, IRD, Université de la Réunion, CNRS, IFREMER, Université de Nouvelle-Calédonie, Nouméa, New Caledonia
   Aix-Marseille University, Mediterranean Institute of Oceanography (MIO), CNRS/INSU, IRD, Marseille, France
   Laboratory of Marine Biology and Ecology, Aquarium des Lagons, Nouméa, New Caledonia
   Sorbonne Université, CNRS, Laboratoire d'Océanographie Microbienne (LOMIC), Paris, France
C2 IRD, FRANCE
   UNIV AIX MARSEILLE, FRANCE
   AQUARIUM LAGONS, FRANCE
   UNIV SORBONNE, FRANCE
UM ENTROPIE
IF 4.5
TC 0
UR https://archimer.ifremer.fr/doc/00880/99224/109114.pdf
   https://archimer.ifremer.fr/doc/00880/99224/109115.docx
LA English
DT Article
AB Ocean warming will affect the functioning of coral reef ecosystems with unknown cascading effects. Any perturbation in the ability of sponges to recycle the dissolved organic matter released by primary producers and make it available to higher trophic levels, might have unknown consequences for the reef trophic chain. Biogeochemical processes were measured in the sponge Rhabdastrella globostellata from the semi-enclosed lagoon of Bouraké, where temperatures reach 33.8°C and fluctuates by 6.5°C on a daily basis, and from a control reef (28°C). Using 13C- and 15N-labeled coral mucus, we experimentally investigated to what extent high temperature affected the carbon (C) and nitrogen (N) resources allocation in the sponge tissue and detritus. Sponges from Bouraké maintained at 32°C incorporated more 13C- and 15N-labeled coral mucus in the tissue and showed less detritus release when compared with sponges maintained at 28°C. In contrast, at 32°C control sponges showed lower 13C- and 15N-labeled coral mucus incorporation in tissue and higher release of detritus. Our results suggest that sponges adapted to extreme temperatures of Bouraké were able to reallocate C and N resources from cell turnover to somatic growth and reduce tissue damage. In contrast, non-adapted sponges at the control reef lack this mechanism and underwent tissue disintegration, highlighting the lethal effect of future warming. The change in C and N allocation in adapted sponges suggests a potential adaptation mechanism that allows R. globostellata to survive under thermal stress, but it could alter the availability of essential sources of energy with unknown consequences on the future reef trophic interactions. 
PY 2024
PD APR
SO Limnology and oceanography
SN 0024-3590
PU ASLO
VL 69
IS 4
BP 976
EP 991
DI 10.1002/lno.12542
ID 99224
ER

EF