highly significantP < 0.001
3.4 Several midstream stations showed lower pollution levels in JDS 3 than in JDS 2 A comparison between the midstream data from 2013 (JDS 3) and 2007 (JDS 2) revealed a similar pollution pattern (see ( Kirschner et al., 2009 )) and a highly significant correlation between the years (rho = 0.738; P < 0.001, n = 48).