Articles | Volume 18, issue 11
Biogeosciences, 18, 3421–3444, 2021
https://doi.org/10.5194/bg-18-3421-2021
Biogeosciences, 18, 3421–3444, 2021
https://doi.org/10.5194/bg-18-3421-2021
Research article
10 Jun 2021
Research article | 10 Jun 2021

Seasonality of nitrogen sources, cycling, and loading in a New England river discerned from nitrate isotope ratios

Veronica R. Rollinson et al.

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Cited articles

Amundson, R., Austin, A. T., Schuur, E. A. G., Yoo, K., Matzek, V., Kendall, C., Uebersax, A., Brenner, D., and Baisden, W. T.: Global patterns of the isotopic composition of soil and plant nitrogen, Global Biogeochem. Cy., 17, https://doi.org/10.1029/2002GB001903, 2003. 
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We measured nutrients and the naturally occurring nitrogen (N) and oxygen (O) stable isotope ratios of nitrate discharged from a New England river over an annual cycle, to monitor N loading and identify dominant sources from the watershed. We uncovered a seasonality to loading and sources of N from the watershed. Seasonality in the nitrate isotope ratios also informed on N cycling, conforming to theoretical expectations of riverine nutrient cycling.
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