Nitrous oxide (N2O) fluxes and their relationships with water-sediment characteristics in a hyper-eutrophic shallow lake, China

Journal Article (Journal Article)

Nitrous oxide (N O) fluxes were measured in hyper-eutrophic Meiliang Bay of Lake Taihu by the static chamber method for two years. The lake was an important source of atmospheric N O. Large temporal variations were recorded for N O fluxes, ranging from -278 to 2101 μg N O m h in the littoral zone and from -177 to 164 μg N O m h in the pelagic zone, with the highest N O emissions observed during the algal bloom. Wide spatial variation in N O fluxes occurred in the littoral zone responding to water-sediment variables, while such variation was not found in the pelagic zone. In the infralittoral zone, the redox condition, temperature and nitrogen (N) sources controlled the N O fluxes, whereas the influences of these parameters on N O fluxes were weak in the pelagic zone. This difference indicated that N cycling was more intensive in the littoral zone than in the pelagic zone. A multiple linear regression model against principal components indicated that water-column denitrification and the carbon (C) and N contents of the sediment affected the N O exchange in the infralittoral zone. Water-column inorganic N content affected the consumption of atmospheric N O significantly in both zones. Copyright 2007 by the American Geophysical Union. 2 2 2 2 2 2 2 2 2 2 2 -2 -1 -2 -1

Full Text

Duke Authors

Cited Authors

  • Wang, H; Yang, L; Wang, W; Lu, J; Yin, C

Published Date

  • March 28, 2007

Published In

Volume / Issue

  • 112 / 1

International Standard Serial Number (ISSN)

  • 0148-0227

Digital Object Identifier (DOI)

  • 10.1029/2005JG000129

Citation Source

  • Scopus