@article{fdi:010087676, title = {{S}ponge organic matter recycling : reduced detritus production under extreme environmental conditions}, author = {{M}aggioni, {F}. and {B}ell, {J}. {J}. and {P}ujo-{P}ay, {M}. and {S}haffer, {M}. and {C}errano, {C}. and {L}emonnier, {H}. and {L}etourneur, {Y}. and {R}odolfo-{M}etalpa, {R}iccardo}, editor = {}, language = {{ENG}}, abstract = {{S}ponges are a key component of coral reef ecosystems and play an important role in carbon and nutrient cycles. {M}any sponges are known to consume dissolved organic carbon and transform this into detritus, which moves through detrital food chains and eventually to higher trophic levels via what is known as the sponge loop. {D}espite the importance of this loop, little is known about how these cycles will be impacted by future environmental conditions. {D}uring two years (2018 and 2020), we measured the organic carbon, nutrient recycling, and photosynthetic activity of the massive {HMA}, photosymbiotic sponge {R}habdastrella globostellata at the natural laboratory of {B}ourak{\'e} in {N}ew {C}aledonia, where the physical and chemical composition of seawater regularly change according to the tide. {W}e found that while sponges experienced acidification and low dissolved oxygen at low tide in both sampling years, a change in organic carbon recycling whereby sponges stopped producing detritus (i.e., the sponge loop) was only found when sponges also experienced higher temperature in 2020. {O}ur findings provide new insights into how important trophic pathways may be affected by changing ocean conditions.}, keywords = {{S}ponge loop ; {O}rganic matter recycling ; {S}ponge metabolism ; {E}xtreme environments ; {B}ourak{\'e} ; {NOUVELLE} {CALEDONIE} ; {PACIFIQUE} {SUD}}, booktitle = {}, journal = {{M}arine {P}ollution {B}ulletin}, volume = {190}, numero = {}, pages = {114869 [12 p.]}, ISSN = {0025-326{X}}, year = {2023}, DOI = {10.1016/j.marpolbul.2023.114869}, URL = {https://www.documentation.ird.fr/hor/fdi:010087676}, }