FN Archimer Export Format
PT J
TI Modélisation écologique de la marée verte sur les côtes bretonnes
TI Ecological modelling of Ulva mass blooms on the Britanny coasts
BT 
AF Perrot, Thierry
   Menesguen, Alain
   Dumas, Franck
AS 1:1;2:2;3:2;
FF 1:;2:;3:;
C2 CEVA, FRANCE
   IFREMER, FRANCE
IF 0.129
TC 0
UR https://archimer.ifremer.fr/doc/00480/59150/61779.pdf
LA French
   English
DT Article
AB Every spring and summer, and for two decades, mass-blooms produced by a green alga of the genus Ulva, have been polluting some localities along the Brittany coasts. The main aspect of the nuisance lies in the stranding and further decomposition of large amounts of algae along recreational zones inducing visual and odoriferous pollution. Sites which are favourable to Ulva mass-blooms are shallow areas where water exchange with the open sea is slow (weak residual drift of water masses and long residence time). Drifting algae and nutrients are both trapped in these zones thus allowing Ulva thalli to be kept in good cultivation conditions. In collaboration with Ifremer, the so-called “MARS-ulve” ecological model (coupling the biochemical model ELISE with the hydrodynamical model MARS 2D) has been developed. The main goal of the ecological model is to establish quantitative quality objectives relative to nitrate and ammonia in the tributaries of the main bays of Brittany severely polluted by Ulva « green tide ». A specific capability of this model is to allow quantifying the relative contribution of each source of inorganic supply in the feeding of the green tide. A new numerical technique which allows assessing the proportion of nitrogen in the nitrogen pool of the ulvae has been coupled with the ecological model and applied in the St Brieuc bay. 
PY 2007
PD OCT
SO La Houille Blanche
SN 0018-6368
PU EDP Sciences
IS 5
BP 49
EP 55
DI 10.1051/lhb:2007059
ID 59150
ER

EF