FN Archimer Export Format
PT J
TI Influence of Freshwater Discharges on Biogeochemistry and Benthic Communities of a Coral Reef Ecosystem (La Réunion Island, Indian Ocean)
BT 
AF Tedetti, Marc
   Bigot, Lionel
   Turquet, Jean
   Guigue, Catherine
   Ferretto, Nicolas
   Goutx, Madeleine
   Cuet, Pascale
AS 1:1;2:2;3:3;4:1;5:1;6:1;7:2;
FF 1:;2:;3:;4:;5:;6:;7:;
C1 Aix-Marseille Univ., Université de Toulon, CNRS, IRD, MIO UM 110, Marseille, France
   UMR ENTROPIE, LabEx CORAIL, Université de La Réunion, La Réunion, France
   Centre Technique de Recherche et de Valorisation des Milieux Aquatiques (CITEB), La Réunion, France
C2 UNIV AIX MARSEILLE, FRANCE
   UNIV LA REUNION, FRANCE
   CITEB, FRANCE
UM ENTROPIE
IN WOS Cotutelle UMR
   DOAJ
   copubli-france
   copubli-univ-france
IF 5.247
TC 7
UR https://archimer.ifremer.fr/doc/00658/77030/78316.pdf
   https://archimer.ifremer.fr/doc/00658/77030/80841.docx
LA English
DT Article
DE ;coral reefs;La Reunion;Indian Ocean;eutrophication;groundwater;nutrients;organic matter;fluorescence
AB We investigated the influence of freshwater discharges on biogeochemistry and benthic communities of La Saline fringing reef, the largest coral reef system of La Réunion Island (France, Indian Ocean). Sampling was conducted in February–March 2012 along a land-ocean continuum, including rivers, groundwater, reef waters, and oceanic waters. Our results indicated the discharges of basalt groundwater (enriched in nitrates) in the southern part of the reef, and the discharges of sand groundwater and river waters (enriched in organic matter) in sites located northward. These discharges mainly impacted fore reef surface waters, while groundwater resurgences were more diffuse and not clearly detected in depth. We highlighted the relationship Si(OH)4/NO3– to identify basalt groundwater discharges. We also put forward the relationships humic-like fluorescence/NH4+ and tryptophan-like fluorescence/PO43– to identify sand groundwater discharges and wastewater pollutions, respectively. We observed the eutrophication of the southern part of the reef through higher phytoplankton biomasses, a massive presence of fleshy algal formations and a low coral coverage. The spatial homogeneity of the benthic community structures onto the entire slope contrasted with the spatial heterogeneity of chemical variables in water. This reflected the different spatial and temporal scales involved in biological and chemical processes in coral reef ecosystems. 
PY 2020
PD NOV
SO Frontiers In Marine Science
SN 2296-7745
PU Frontiers Media SA
VL 7
UT 000591646700001
DI 10.3389/fmars.2020.596165
ID 77030
ER

EF