La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Long-Term Variability of Nutrients and Chlorophyll in the Chesapeake Bay: A Retrospective Analysis, 1985-2008
Auteurs :	M. Bala Krishna Prasad, Auteur ; Mathew R. P. Sapiano, Auteur ; Clarissa R. Anderson, Auteur ; Wen Long, Auteur ; Raghu Murtugudde, Auteur
Type de document :	Article
Dans :	Estuaries and Coasts (33(5) SEP 2010)
Article en page(s) :	1128-1143
Résumé :	A retrospective analysis of freshwater discharge, riverine dissolved nutrient loads, dissolved nutrients, and chlorophyll in the Chesapeake Bay from 1985 to 2008 is presented. It is evident that each field displays an interannual variability averaged over the Bay. The N and P loads peaked in 1997 and have fluctuated with a decreasing trend since early 2004. Dissolved nutrient concentrations in the Bay appear to be largely controlled by riverine nutrient loads. The temporal variability of chlorophyll is positively correlated with nutrient loads and concentrations. Over the study period, N:P (DIN:DIP) molar ratios were consistently higher than the Redfield ratio (N:P=16:1) and strongly correlated with river discharge (R(2)=0.68, p16:1), and N is the limiting nutrient in summer and early autumn (N:P

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