Abstract
Patterns of phosphorus (P; dissolved and particulate) and nitrate (NO3) delivery were compared between times of base flow and events in a stream draining a small agroforestry catchment in Galicia, northwest Spain. Nutrient concentrations were low during base flow, and only nitrate shows a clear seasonal pattern. In general, particulate phosphorus (PP) was the dominant fraction of the total P. Particulate P concentrations increased significantly during storms, with maximum concentrations occurring on the rising limb of the hydrograph (clockwise hysteresis). The rapid response of PP suggests a near‐stream source of PP during events. The surface runoff is the mainly route to transport PP to the stream, whereas for the dissolved phosphorus (DP) and NO3 the subsurface path is also important.
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