TY - JOUR T1 - Alexandrium minutum growth controlled by phosphorus An applied model A1 - Chapelle,Annie A1 - Labry,Claire A1 - Sourisseau,Marc A1 - Lebreton,Carole A1 - Youenou,Agnes A1 - Crassous,Marie-Pierre AD - IFREMER, F-29280 Plouzane, France. AD - GKSS Res Ctr Geesthacht Inst Coastal Res, D-21502 Geesthacht, Germany. UR - https://doi.org/10.1016/j.jmarsys.2010.05.012 DO - 10.1016/j.jmarsys.2010.05.012 KW - Toxic algal blooms KW - Alexandrium KW - Phosphorus uptake KW - Models KW - Competition KW - Northwest France N2 - Toxic algae are a worldwide problem threatening aquaculture public health and tourism Alexandrium a toxic dinoflagellate proliferates in Northwest France estuaries (i e the Penze estuary) causing Paralytic Shellfish Poisoning events Vegetative growth and in particular the role of nutrient uptake and growth rate are crucial parameters to understand toxic blooms With the goal of modelling in situ Alexandrium blooms related to environmental parameters we first try to calibrate a zero-dimensional box model of Alexandrium growth This work focuses on phosphorus nutrition Our objective is to calibrate Alexandrium minutum as well as Heterocapsa triquetra (a non-toxic dinoflagellate) growth under different rates of phosphorus supply other factors being optimal and constant Laboratory experiments are used to calibrate two growth models and three uptake models for each species Models are then used to simulate monospecific batch and semi continuous experiments as well as competition between the two algae (mixed cultures) Results show that the Droop growth model together with linear uptake versus quota can represent most of our observations although a power law uptake function can more accurately simulate our phosphorus uptake data We note that such models have limitations in non steady-state situations and cell quotas can depend on a variety of factors so care must be taken in extrapolating these results beyond the specific conditions studied (C) 2010 Elsevier BV All rights reserved Y1 - 2010/11 PB - Elsevier Science Bv JF - Journal Of Marine Systems SN - 0924-7963 VL - 83 IS - 3-4 SP - 181 EP - 191 ID - 12901 ER -