FN Archimer Export Format
PT J
TI Benthic metabolism over the emersion - Immersion alternation in sands colonized by the invasive Manila clam Ruditapes philippinarum
BT 
AF MIGNE, Aline
   TRIGUI, Rima Jihane
   DAVOULT, Dominique
   DESROY, Nicolas
AS 1:1;2:2;3:1;4:2;
FF 1:;2:;3:;4:PDG-ODE-LITTORAL-LERBN;
C1 Sorbonne Univ, UPMC Univ Paris 06, CNRS, UMR AD2M 7144,Stn Biol, F-29680 Roscoff, France.
   IFREMER, Lab Environm Ressources Bretagne Nord, Stn Dinard, F-35800 Dinard, France.
C2 UNIV PARIS 06, FRANCE
   IFREMER, FRANCE
SI DINARD
SE PDG-ODE-LITTORAL-LERBN
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
IF 2.611
TC 5
UR https://archimer.ifremer.fr/doc/00412/52327/53100.pdf
LA English
DT Article
DE ;Benthic fluxes;Benthos;Inorganic carbon;Nutrients;Suspension-feeding bivalve;Tidal flats;France;Western English Channel
AB The effect of an invasive infaunal suspension-feeding bivalve, the Manila clam Ruditapes philippinarum, on benthic inorganic carbon and nutrient fluxes was examined through in situ incubations. Measurements were performed in spring and summer on a tidal sandflat of the Rance estuary (south part of the Western English Channel) colonized by the Manila clam after its deliberate introduction in the 1990's. Benthic inorganic carbon fluxes were measured using light and dark benthic chambers both at emersion and immersion. Benthic nutrient fluxes were measured using dark benthic chambers at immersion. Inorganic carbon (IC) and ammonium sediment release under darkness at immersion reached 5.60 mmol m−2 h−1 and 441 μmol m−2 h−1 respectively for a clam density of 291 ind m−2. The sediment IC-release under darkness was lower during emersion than during immersion, probably due to the reduced activity of infauna at low tide. Under ambient light, a sediment IC-uptake was systematically measured at emersion, indicating a net autotrophy under the condition of measurements (125 < surface PAR < 1670 μmol m−2 s−1), while either sediment IC-uptake or release was measured at immersion according to light variation (20 < underwater PAR < 990 μmol m−2 s−1). The highest gross community primary production, calculated from highest IC-fluxes at light (i.e. net community production) and highest IC-fluxes at dark (i.e. community respiration), was similar at emersion and immersion and reached 6.2 mmolC m−2 h−1. These results suggest that the metabolic activity of the invasive Manila clam Ruditapes philippinarum contributes to increase inorganic C and ammonium sediment release. These regenerated nutrients may support microphytobenthic production which appeared particularly high on this intertidal sand flat 
PY 2018
PD JAN
SO Estuarine Coastal And Shelf Science
SN 0272-7714
PU Academic Press Ltd- Elsevier Science Ltd
VL 200
UT 000424308600033
BP 371
EP 379
DI 10.1016/j.ecss.2017.11.030
ID 52327
ER

EF