(a) Ordination of the samples corresponding to the different sampling periods and creeks, (b) scores of diatoms relative abundance and environmental variables, along the redundancy analysis axes. Environmental variables: T: temperature, EC: specific conductance, DO: dissolved oxygen, NO3: nitrate-nitrogen, PO4: orthophosphate, TP: total phosphorus (blue: 1st station, yellow: 2nd station, purple: 3rd station, red: 4th station, dark green: 5th station, green: 6th station, orange: 7th station, black: 8th station). Full names and codes of species were given in Table 3.