Table 14. 1st dominant species status by survey site in Yeouicheon

Site March July September November
1st dominnant species (pollution index) DI 1st dominnant species (pollution index) DI 1st dominnant species (pollution index) DI 1st dominnant species (pollution index) DI
Up stream Asellus (2.3) 0.69 Asellus (2.3) 0.46 Baetis fuscatus (1.8) 0.56 Turbellaria (0.7) 0.38
Seawon bridge Asellus (2.3) 0.71 Asellus (2.3) 0.85 Baetis fuscatus (1.8) 0.66 Asellus (2.3) 0.62
Yeoui bridge Chironomidae (3.4) 0.81 Asellus (2.3) 0.71 Baetis fuscatus (1.8) 0.89 Asellus (2.3) 0.92