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Articles | Volume 12, issue 6
Articles | Volume 12, issue 6
https://doi.org/10.5194/bg-12-1941-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/bg-12-1941-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
Articles | Volume 12, issue 6
Research article
 | 
24 Mar 2015
Research article |  | 24 Mar 2015

Riparian and in-stream controls on nutrient concentrations and fluxes in a headwater forested stream

S. Bernal, A. Lupon, M. Ribot, F. Sabater, and E. Martí

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Cited articles

Alexander, R. B., Böhlke, J. K., Boyer, E. W., David, M. B., Harvey, J. W., Mulholland, P. J., Seitzinger, S. P., Tobias, C. R., Tonitto, C., and Wollheim, W. M.:Dynamic modeling of nitrogen losses in river networks unravels the coupled effects of hydrological and biogeochemical processes, Biogeochemistry, 93, 91–116, 2009.
Asano, Y., Uchida, T. M., Mimasu, Y., and Ohte, N.: Spatial patterns of stream solute concentrations in a steep mountainous catchment with a homogeneous landscape, Water Resour. Res., 45, W10432, https://doi.org/10.1029/2008WR007466, 2009.
Àvila, A. and Rodà, F.: Changes in atmospheric deposition and streamwater chemistry over 25 years in undisturbed catchments in a Mediterranean mountain environment, Sci. Total Environ., 434, 18–27, 2012.
Baethgen, W. and Alley, M.: A manual volorimetric procedure for ammonium nitrogen in soil and plant Kjeldahl Digests, Commun. Soil Sci. Plan., 20, 961–969, 1989.
Bernal, S., von Schiller, D., Martí, E., and Sabater, F.: In-stream net uptake regulates inorganic nitrogen export from catchment under base flow conditions, J. Geophys. Res., 117, G00N05, https://doi.org/10.1029/2012JG001985, 2012.
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Terrestrial inputs are considered the major driver of longitudinal patterns of nutrient concentration. Yet we show that longitudinal trends result from hydrological mixing with terrestrial inputs and in-stream processes. We challenge the idea that nutrient concentrations decrease downstream when in-stream net uptake is high. Conversely, in-stream processes can strongly affect stream nutrient chemistry and fluxes even in the absence of consistent longitudinal trends in nutrient concentration.
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