Experimental removal and addition of leaf litter inputs reduces nitrate production and loss in a lowland tropical forest

Environmental perturbations such as changes in land use, climate, and atmospheric carbon dioxide concentrations may alter organic matter inputs to surface soils. While the carbon (C) cycle response to such perturbations has received considerable Electronic supplementary material The online version of this article (doi:10.1007/sl0533-012-9793-l) contains supplementary material, which is available to authorized users. W. R. W ieder • P. G. Taylor • D. R. Nemergut • E.-L. Hinckley • S. R. Weintraub • M. Martin • A. R. Townsend Institute for Arctic and Alpine Research; Department of Ecology and Evolutionary Biology, University of Colorado, Boulder, CO 80309, USA e-mail: philip.taylor @ Colorado.edu