Multi-year distribution patterns of nutrients within the Neuse River Estuary, North Carolina

Abstract

Concentrations of dissolved species decreased down-estuary, although internal sources of both ammonium and filterable reactive phosphorus were apparent. Particulate species demonstrated maxima in the upper estuary associated with autochthonous production. The relative isolation of the estuary from ocean inputs and long flushing times of freshwater promotes nonconservative mixing of nutrient species. Average flushing time for the estuary was 51 d, providing an extended period for substantial recycling. Distribution patterns reflect the dominance of biological and chemical activity except when large freshets cause rapid movement of water to the lower estuary and out into Pamlico Sound. -from Authors