“…Dissolved nitrogen (N) entering an ecosystem through wet deposition (e.g., precipitation) is subject to many fates driven by a watershed's hydrology (Burt & McDonnell, 2015) and capacity for solute biogeochemical processing (Aber et al., 1998; Monteith et al., 2023). Wet deposition N, including nitrate (NO 3 − ), ammonium (NH 4 + ), and dissolved organic N (DON), can be immediately discharged to rivers via surface and sub‐surface flow paths during storm events (Baron et al., 2013; Kirker & Toran, 2023; Whitehead et al., 2009), temporarily stored in saturated soil pore water (Bastviken et al., 2006; Dunne, 1978), exchanged within soil clay minerals (Robertson et al., 1999), and subjected to plant uptake (Bernal et al., 2012; Lovett et al., 2000) or to microbially mediated biogeochemical transformations (Jenkinson et al., 1985). The biogeochemical fate of wet deposition N also depends on its form.…”