Amphora ovalis pediculus 1 Aulacoseira granulata 1 Bacillariophyta 1 Cyclostephanos dubius Diatom assemblage 1 Diatom indices 1 Diatom trophic index 1 Epilithic diatom 1 Fragilaria crotonensis 1 Hydraulic retention 1 Hydraulic retention time 1 Land use 1 Melosira varians 1 Meteorological variables 1 Nakdong River 1 Nakdong river 1 Navicula gregaria 1 Navicula minima 1 Nitzschia amphibia 1 Nitzschia inconspicua 1 Nutrients 1 Phosphorus 1 Precipitation (chemical) 1 Rivers 1 South Korea 1 Varanidae 1 Water quality 1 Weir 1 Weirs 1 assembly rule 1