…et al., 2008;Yang et al., 2008; Reyes and Vidal, 2015), seasonal variation (Tunçsiper et al., 2015, Reyes and Vidal, 2015; Gorra et al., 2014), pH value (Tao et al., 2012; He et al., 2012), and the presence and type of vegetation (Huett et al., 2005; Gottschall et al., 2007; Comin et al., 1997).