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Linkages Between Organic Matter Mineralization and Denitrification in Eight Riparian Wetlands by Sybil P. Seitzinger is a Environmental Science article available to read on EtoBox.

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Denitrification (N, production) and oxygen consumption rates were measured at ambient field nitrate concentrations during summer in sediments from eight wetlands (mixed hardwood swamps, cedar swamps, heath dominated shrub wetland, herbaceous peatland, and a wetland lacking live vegetation) and two streams. The study sites included wetlands in undisturbed watersheds and in watersheds with considerable agricultural and/or sewage treatment effluent input. Denitrification rates measured in intact cores of water-saturated sediment ranged from 5 20 to 260 pmol N ma h-r among the three undisturbed wetlands and were less variable (180 to 260 Fmol N mm2 h-') among the four disturbed wetlands. Denitrification rates increased when nitrate concentrations in the overlying water were increased experimentally (1 up to 770 PM), indicating that nitrate was an important factor controlling denitrification rates. However, rates of nitrate uptake from the overlying water were not a good predictor of denitrification rates because nitrification in the sediments also supplied nitrate for denitrification. Regardless of the dominant vegetation, pH, or degree of disturbance, denitrification rates were best c

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Author

Sybil P. Seitzinger

Publisher

Springer Netherlands; Springer-Verlag; Kluwer Academic Publishers; Springer Science and Business Media LLC (ISSN 0923-9820)

Published

1994

Language

EN

Field

Environmental Science (Physical Sciences)