A Chemical Survey of the Mississippi Estuary

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Abstract
A “snap shot” survey of the Mississippi estuary was made during a period of low river discharge, when the estuarine mixing zone was within the deltaic channels. Concentrations of H+, Ca2+, inorganic phosphorus and inorganic carbon suggest that the waters of the river and the low salinity (5‰). The phytoplankton abundance (measured as chlorophylla) increased as the depth of the mixed layer decreased in a manner consistent with that expected for a light-limited ecosystem. Fluxes of NO3 −+NO2 − and soluble inorganic phosphorus to the Gulf of Mexico were estimated to be 3.4±0.2×103 g N s−1 and 1.9±0.2 g P s−1 respectively, at the time of this study.

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