Trends in stream nitrogen concentrations for forested reference catchments across the USA

A Argerich¹, S L Johnson², S D Sebestyen³, C C Rhoades⁴, E Greathouse¹, J D Knoepp⁵, M B Adams⁶, G E Likens^7,8, J L Campbell⁹, W H McDowell¹⁰, F N Scatena¹¹ and G G Ice¹²

Published 12 March 2013 • © 2013 IOP Publishing Ltd
Environmental Research Letters, Volume 8, Number 1 Citation A Argerich et al 2013 Environ. Res. Lett. 8 014039 DOI 10.1088/1748-9326/8/1/014039