Data/hora: 10/06/2024 13:41:47

Provedor de dados: | Institutional Archive of Ifreme (ArchiMer)
País: | France
Título: | Modeling continuous cultures of microalgae colimited by nitrogen and phosphorus
Autores: | Bougaran, Gael; Bernard, Olivier; Sciandra, Antoine.
Data: | 2010-08
Ano: | 2010
Palavras-chave: | Colimitation; Phytoplankton; Mathematical model; Quota.
Resumo: | 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 Selenastrum minutum and with Isochrysis affinis galbana. Our analysis suggests that, regarding the colimitation concept. N and P would be better considered as biochemically dependent rather than biochemically independent nutrients. (C) 2010 Elsevier Ltd. All rights reserved.
Tipo: | Text
Idioma: | Inglês

Identificador:

http://archimer.ifremer.fr/doc/00011/12216/9060.pdf

DOI:10.1016/j.jtbi.2010.04.018

Editor: | Academic Press Ltd- Elsevier Science Ltd
Relação: | http://archimer.ifremer.fr/doc/00011/12216/
Formato: | application/pdf
Fonte: | Journal Of Theoretical Biology (0022-5193) (Academic Press Ltd- Elsevier Science Ltd), 2010-08 , Vol. 265 , N. 3 , P. 443-454
Fonte: | 2010 Elsevier B.V. All rights reserved.