“…Moreover diatoms have distinct ecological tolerances (Bahls, 1993) and short generation time (Zalack et al, 2010;Tan et al, 2014b), making them suitable indicator organisms for water quality changes over short time scales. Diatoms have been employed as water quality indicators in Europe (Kelly et al 1998;Prygiel et al, 1999), North America (Stevenson and Pan, 1999;Lowe and Pan, 1996;Winter and Duthie, 2000;Lavoie et al, 2006Lavoie et al, , 2014, South America (Lobo et al, 1996;Bere and Tundisi, 2011), Australia (Chessman et al, 1999;John, 2000), Asia (Lobo et al, 1995;Rothfritz et al, 1997) and, to a lesser extent, Africa (Bellinger et al, 2006;Ndirutu et al, 2006;Taylor et al, 2007a, b;Bere et al, 2014;Mangadze et al, 2015).…”