FN Archimer Export Format
PT J
TI Subtropical coastal microbiome variations due to massive river runoff after a cyclonic event
BT 
AF MEYNENG, Mathisse
   LEMONNIER, Hugues
   LE GENDRE, Romain
   ANTYPAS, Florence
   ANSQUER, Dominique
   SERGHINE, Joelle
   SCHMITT, Sophie
   SIANO, Raffaele
AS 1:1;2:2;3:2;4:2;5:2;6:1;7:1;8:1;
FF 1:PDG-ODE-DYNECO-PELAGOS;2:PDG-RBE-LEADNC;3:PDG-RBE-LEADNC;4:PDG-RBE-LEADNC;5:PDG-RBE-LEADNC;6:PDG-ODE-DYNECO-PELAGOS;7:PDG-ODE-DYNECO-PELAGOS;8:PDG-ODE-DYNECO-PELAGOS;
C1 IFREMER, DYNECO, BP70, Plouzané, France
   French Institute for Research in the Science of the Sea (IFREMER), Research Institute for Development (IRD), University of New Caledonia, University of Reunion, CNRS, UMR 9220 ENTROPIE, Nouméa, New Caledonia
C2 IFREMER, FRANCE
   IFREMER, FRANCE
SI BREST
   NOUMEA
   SAINT VINCENT
SE PDG-ODE-DYNECO-PELAGOS
   PDG-RBE-LEADNC
UM ENTROPIE
IN WOS Ifremer UPR
   WOS Ifremer UMR
IF 7.9
TC 0
UR https://archimer.ifremer.fr/doc/00875/98690/108196.pdf
   https://archimer.ifremer.fr/doc/00875/98690/108197.docx
   https://archimer.ifremer.fr/doc/00875/98690/108198.docx
   https://archimer.ifremer.fr/doc/00875/98690/108199.xlsx
LA English
DT Article
DE ;Microbial dynamics;Environmental DNA;Extreme events;River runoff;Land-sea continuum;New Caledonia
AB Background Coastal ecosystem variability at tropical latitudes is dependent on climatic conditions. During the wet, rainy season, extreme climatic events such as cyclones, precipitation, and winds can be intense over a short period and may have a significant impact on the entire land‒sea continuum. This study focused on the effect of river runoff across the southwest coral lagoon ecosystem of Grand Terre Island of New Caledonia (South Pacific) after a cyclonic event, which is considered a pulse disturbance at our study site. The variability of coastal microbiomes, studied by the metabarcoding of V4 18S (protists) and V4–V5 16S (bacteria) rDNA genes, after the cyclone passage was associated with key environmental parameters describing the runoff impact (salinity, organic matter proxies, terrestrial rock origin metals) and compared to community structures observed during the dry season. Results Microbiome biodiversity patterns of the dry season were destructured because of the runoff impact, and land-origin taxa were observed in the coastal areas. After the rainy event, different daily community dynamics were observed locally, with specific microbial taxa explaining these variabilities. Plume dispersal modeling revealed the extent of low salinity areas up to the coral reef area (16 km offshore), but a rapid (< 6 days) recovery to typical steady conditions of the lagoon's hydrology was observed. Conversely, during the same time, some biological components (microbial communities, Chl a) and biogeochemical components (particulate nickel, terrigenous organic matter) of the ecosystem did not recover to values observed during the dry season conditions. Conclusion The ecosystem resilience of subtropical ecosystems must be evaluated from a multidisciplinary, holistic perspective and over the long term. This allows evaluating the risk associated with a potential continued and long-term disequilibrium of the ecosystem, triggered by the change in the frequency and intensity of extreme climatic events in the era of planetary climatic changes. 
PY 2024
PD JAN
SO Environmental Microbiome
SN 2524-6372
PU BMC
VL 19
IS 1
UT 001154742200001
DI 10.1186/s40793-024-00554-9
ID 98690
ER

EF