Data/hora: 12/06/2024 13:40:35

Provedor de dados: 	5	
País: 	France	
Título: 	Patterns in nutrient limitation and chlorophyll a along an anthropogenic eutrophication gradient in French Mediterranean coastal lagoons	
Autores: 	Souchu, Philippe; Bec, Beatrice; Smith, Val H.; Laugier, Thierry; Fiandrino, Annie; Benau, Laurent; Orsoni, Valerie; Collos, Yves; Vaquer, Andre.	
Data: 	2010-04	
Ano: 	2010	
Resumo: 	A cross-ecosystem comparison of data obtained from 20 French Mediterranean lagoons with contrasting eutrophication status provided the basis for investigating the variables that best predict chlorophyll a (Chl a) concentrations and nutrient limitation of phytoplankton biomass along a strong nutrient enrichment gradient. Summer concentrations of dissolved inorganic nitrogen (DIN) and phosphorus (DIP) comprised only a small fraction of total nitrogen (TN) and total phosphorus (TP). On the basis of inorganic nutrient concentrations, the most oligotrophic lagoons appeared to be phosphorus-limited, with a tendency towards the development of nitrogen limitation as eutrophication increased, as evidenced by decreasing DIN:DIP ratios. A weak but significantly positive relationship was found between dissolved silicate (DSi) and Chl a, reflecting DSi accumulation in the water column along the trophic state gradient and implying a progressive shift away from potential Si limitation of phytoplankton growth. Observed concentrations of Chl a were far better explained by TN and TP than by DIN and DIP concentrations, suggesting that a total nutrient based approach is likely to be the most appropriate for managing eutrophication in Mediterranean lagoons and other coastal waters. These results give credence to the idea that marine and freshwater environments respond in a similar fashion to nutrient enrichment.	
Tipo: 	Text	
Idioma: 	Inglês	
Identificador: 	http://archimer.ifremer.fr/doc/00003/11444/8002.pdf

DOI:10.1139/F10-018	
Editor: 	National Research Council Canada	
Relação: 	http://archimer.ifremer.fr/doc/00003/11444/	
Formato: 	application/pdf	
Fonte: 	Canadian Journal Of Fisheries And Aquatic Sciences (0706-652X) (National Research Council Canada), 2010-04 , Vol. 67 , N. 4 , P. 743-753	
Fonte: 	2010 National Research Council Canada