FN Archimer Export Format
PT J
TI Manganese, iron and phosphorus cycling in an estuarine mudflat, Loire, France
BT 
AF THIBAULT DE CHANVALON, A.
   MOURET, A.
   KNOERY, Joel
   GESLIN, E.
   PERON, O.
   METZGER, E.
AS 1:1,2;2:1;3:2;4:1;5:3;6:1;
FF 1:;2:;3:PDG-RBE-BE-LBCM;4:;5:;6:;
C1 Univ Nantes, Univ Angers, LPG, BIAF,CNRS,UMR 6112, F-49045 Angers, France.
   IFREMER, LBCM, Rue Ile Yeu, F-44300 Nantes, France.
   Univ Nantes, CNRS, EMN, Lab Subatech,Grp Radiochim,IN2P3, 4 Rue Alfred Kastler,BPe 20722, F-44307 Nantes 3, France.
C2 UNIV ANGERS, FRANCE
   IFREMER, FRANCE
   UNIV NANTES, FRANCE
SI NANTES
SE PDG-RBE-BE-LBCM
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
IF 1.888
TC 18
UR https://archimer.ifremer.fr/doc/00354/46525/46291.pdf
LA English
DT Article
DE ;Flood deposition;Ascorbat extraction;Transient diagenesis;Savitzky Golay filter;RiOMars
AB The sampling of surface sediment from two sites of a mudflat of the Loire Estuary during four contrasting seasons has led to new information about geochemical cycling under transient diagenesis fuelled by flood deposition. Based on stocks of reactive iron-oxides and manganese-oxides (ascorbate-extracted) and pore water concentrations, the progressive evolution of flood deposits is described. Three major steps are observed: at first, there is no manganese, iron and phosphorus release into pore water within the flood-deposited layer. Then, during a period of approximately 1 month, Mn oxides are consumed while the dissolved Mn concentration increases. Simultaneously, the Fe oxide-rich layer from flood deposition prevents (or at least limits) phosphorus release into pore water as shown by the increasing P/Fe ratio of the ascorbate extractions. During spring and summer, Fe oxides are reductively dissolved until complete depletion results. This period also corresponds to the saturation of Fe oxides by phosphorus and probably maximum P release to the water column. The site located closer to the shore showed higher density of benthic faunas leading to more intense bioirrigation. The importance of bioturbation on the year scale for biogeochemical processes is discussed according to both bioirrigation and biomixing processes.
PY 2016
PD DEC
SO Journal Of Sea Research
SN 1385-1101
PU Elsevier Science Bv
VL 118
UT 000390826000008
BP 92
EP 102
DI 10.1016/j.seares.2016.10.004
ID 46525
ER

EF