FN Archimer Export Format
PT J
TI Comparing diatom and Alexandrium catenella/tamarense blooms in Thau lagoon: Importance of dissolved organic nitrogen in seasonally N-limited systems
BT 
AF COLLOS, Yves
   JAUZEIN, CECILE
   RATMAYA, Widya
   SOUCHU, Philippe
   ABADIE, Eric
   VAGUER, Andre
AS 1:1;2:1;3:2;4:3;5:4;6:1;
FF 1:;2:;3:PDG-ODE-LER-LERMPL;4:PDG-ODE-LITTORAL-LERMPL;5:PDG-ODE-LITTORAL-LERLR;6:;
C1 Univ Montpellier 2, CNRS, IRD, UMR 5119,CC093, F-34095 Montpellier 5, France.
   Diponegoro Univ, Jawa Tengah, Indonesia.
   IFREMER, Lab Environm Ressource Morbihan Pays De La Loire, F-44311 Nantes 03, France.
   IFREMER, Lab Environm Ressource Languedoc Roussillon, F-34203 Sete, France.
C2 UNIV MONTPELLIER, FRANCE
   UNIV DIPONEGORO, INDONESIA
   IFREMER, FRANCE
   IFREMER, FRANCE
SI NANTES
   SETE
SE Ecosym
   PDG-ODE-LER-LERMPL
   PDG-ODE-LITTORAL-LERMPL
   PDG-ODE-LITTORAL-LERLR
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
   copubli-int-hors-europe
   copubli-sud
IF 3.874
TC 20
UR https://archimer.ifremer.fr/doc/00194/30488/29758.pdf
LA English
DT Article
DE ;Alexandrium catenella/tamarense;Non classical blooms;Organic nitrogen;Ammonium;Growth rate
AB Diatom blooms in Thau lagoon are always related to rain events leading to inputs of inorganic nutrients such as phosphate, ammonium and nitrate through the watershed with time lags of about 1 week. In contrast, blooms of Alexandrium catenella/tamarense can occur following periods of 3 weeks without precipitation and no significant input of conventional nutrients such as nitrate and phosphate. Field results also indicate a significant drop (from 22–25 to 15–16 μM over 3 days) in dissolved organic nitrogen (DON) at the bloom peak, as well as a significant inverse relationship between A. catenella/tamarense cell density and DON concentrations that is not apparent for diatom blooms. Such dinoflagellate blooms are also associated with elevated (6–9 μM) ammonium concentrations, a curious feature also observed by other investigators, possibly the results of ammonium excretion by this organism during urea or other organic nitrogen assimilation.  The potential use of DON by this organism represents short cuts in the nitrogen cycle between plants and nutrients and requires a new model for phytoplankton growth that is different from the classical diatom bloom model. In contrast to such diatom blooms that are due to conventional (nitrate, phosphate) nutrient pulses, Alexandrium catenella/tamarense blooms on the monthly time scale are due to organic nutrient enrichment, a feature that allows net growth rates of about 1.3 d−1, a value higher than that generally attributed to such organisms.
PY 2014
PD JUN
SO Harmful Algae
SN 1568-9883
PU Elsevier Science Bv
VL 37
UT 000340322900011
BP 84
EP 91
DI 10.1016/j.hal.2014.05.008
ID 30488
ER

EF