Fig. 2From: Utilization of nitrate stable isotopes of Chydorus sphaericus (OF Müller) to elucidate the hydrological characteristics of riverine wetlands in the Nakdong River, South Koreaδ15N (‰) of Chydorus sphaericus and NO3−-N levels of each water source (SW, surface water; R/G, rainfall/groundwater; S, sewage) and according to riparian connectivity, respectively, in a, b spring and c, d autumn. Bars and error bars represent an average of replicates (±SD)Back to article page