Modeling continuous cultures of microalgae colimited by nitrogen and phosphorus - Université Pierre et Marie Curie Accéder directement au contenu
Article Dans Une Revue Journal of Theoretical Biology Année : 2010

Modeling continuous cultures of microalgae colimited by nitrogen and phosphorus

Résumé

It is well documented that the combination of low nitrogen and phosphorus resources can lead to situations where colimitation of phytoplankton growth arises, yet the underlying mechanisms are not fully understood. Here, we propose a Droop-based model built on the idea that colimitation by nitrogen and phosphorus arises from the uptake of nitrogen. Indeed, since N-porters are active systems, they require energy that could be related to the phosphorus status of the cell. Therefore, we assumed that N uptake is enhanced by the P quota. Our model also accounts for the biological observations that uptake of a nutrient can be down-regulated by its own internal quota, and succeeds in describing the strong contrast for the non-limiting quotas under N-limited and P-limited conditions that was observed on continuous cultures with and with . Our analysis suggests that, regarding the colimitation concept, N and P would be better considered as biochemically dependent rather than biochemically independent nutrients.
Fichier principal
Vignette du fichier
PEER_stage2_10.1016%2Fj.jtbi.2010.04.018.pdf (1.3 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-00608413 , version 1 (13-07-2011)

Identifiants

Citer

Gaël Bougaran, Olivier Bernard, Antoine Sciandra. Modeling continuous cultures of microalgae colimited by nitrogen and phosphorus. Journal of Theoretical Biology, 2010, 265 (3), pp.443. ⟨10.1016/j.jtbi.2010.04.018⟩. ⟨hal-00608413⟩
156 Consultations
253 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More