“…of P by acting as storage sites for particles (González-Sanchis, Murillo, Cabezas, Vermaat, & Comín, 2015;Kiedrzyńska et al, 2008;Maine, Suñe, & Bonetto, 2004). In contrast, other authors have shown that floodplains are P sources due to the exportation of the dissolved fraction (Almeida et al, 2015;Fisher & Acreman, 2004;Reavis & Haggard, 2016). The spatial dynamics of P also shows variable trends; while some studies have shown an increasing concentration from the main channel (MC) to the floodplain (Roberto, Santana, & Thomaz, 2009;Villar, de Cabo, Vaithiyanathan, & Bonetto, 1999); other studies have shown the opposite (González-Sanchis et al, 2015;Maine et al, 2004).…”