FN Archimer Export Format
PT J
TI Atmospherically-promoted photosynthetic activity in a well-mixed ecosystem: Significance of wet deposition events of nitrogen compounds
BT 
AF BOULART, C
   FLAMENT, Pierre
   GENTILHOMME, V
   DEBOUDT, K
   MIGON, C
   LIZON, F
   SCHAPIRA, M
   LEFEBVRE, Alain
AS 1:1;2:2;3:1;4:2;5:3;6:1;7:1;8:4;
FF 1:;2:PDG-DRO-OS;3:;4:;5:;6:;7:;8:PDG-DOP-LER-LERBL;
C1 Univ Littoral Cote Opale, CNRS, FRE 2816, ELICO,Maison Rech Environm Nat, F-62930 Wimereux, France.
   Univ Lille 1, CNRS, Stn Marine Wimereux, FRE 2816,ELICO, F-62930 Wimereux, France.
   Univ Paris 06, CNRS, INSU, Lab Oceanog Villefranche, F-06238 Villefranche Sur Mer, France.
   IFREMER, Lab Environm Littoral & Ressources Aquacoles, F-62321 Boulogne, France.
C2 UNIV LITTORAL COTE D'OPALE, FRANCE
   UNIV LILLE, FRANCE
   UNIV PARIS 06, FRANCE
   IFREMER, FRANCE
SI BREST
   BOULOGNE
SE PDG-DRO-OS
   PDG-DOP-LER-LERBL
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
IF 1.733
TC 14
UR https://archimer.ifremer.fr/doc/2006/publication-2007.pdf
LA English
DT Article
DE ;Strait of Dover;Nutrient cycles;River plumes;Atmospheric deposition;Coastal zone;Primary production
AB Wet atmospheric deposition of dissolved N, P and Si species is studied in well-mixed coastal ecosystem to evaluate its potential to stimulate photosynthetic activities in nutrient-depleted conditions. Our results show that, during spring, seawater is greatly depleted in major nutrients: Dissolved Inorganic Nitrogen (DIN), Dissolved Inorganic Phosphorus (DIP) and Silicic acid (Si), in parallel with an increase of phytoplanktonic biomass. In spring (March-May) and summer (June-September), wet atmospheric deposition is the predominant source (> 60%, relative to riverine contribution) for nitrates and ammonium inputs to this N-limited coastal ecosystem. During winter (October-February), riverine inputs of DIN predominate (> 80%) and are annually the most important source of DIP (> 90%). This situation allows us to calculate the possibility for a significant contribution to primary production in May 2003, from atmospheric deposition (total input for DIN approximate to 300 kg km(-2) month(-1)). Based on usual Redfield ratios and assuming that all of the atmospheric-derived N (AD-N) in rainwater is bioavailable for phytoplankton growth, we can estimate new production due to AD-N of 950 mg C m(-2) month(-1), during this period of depletion in the water column. During the same episode (May 2003), photosynthetic activity rate. considered as gross primary production, was estimated to approximately 30300 mg C m(-2) month(-1). Calculation indicates that new photosynthetic activity due to wet atmospheric inputs of nitrogen could be up to 3%. (c) 2006 Elsevier Ltd. All rights reserved.
PY 2006
PD SEP
SO Estuarine, Coastal and Shelf Science
SN 0272-7714
PU Elsevier
VL 69
IS 3-4
UT 000240947300014
BP 449
EP 458
DI 10.1016/j.ecss.2006.04.021
ID 2007
ER

EF