Gradients of Anthropogenic Nutrient Enrichment Alter N Composition and DOM Stoichiometry in Freshwater Ecosystems

National Science Foundation (NSF) through the Long-Term Ecological Research Network Office (LNO), National Center for Ecological Analysis and Synthesis (NCEAS), University of California-Santa Barbara [1545288]; NSFNational Science Foundation (NSF) [1556603]; New Hampshire Agricultural Experiment Station; USDA National Institute of Food and Agriculture McIntire-Stennis Project [1006760, 1016163]; Natural Environment Research Council, UK Large Grant [NE/K010689/1]