Variations and Relationship between Water Qualities and Macrobenthos in Pattani River Yala Municipalty Yala Province

Abstract

The extent to which water quality affects macrobenthos is very important category for predicting water quality. The objectives of this study were to evaluate the variations and relationship between water qualities and macrobenthos in Pattani River at Yala Municipality, Amphur Muang, Yala Province. Water samples were collected every month. A total of water samples collected twelve times from six stations of the land used were analyzed for possible pollutants and macrobenthos diversity. It was found that dissolved oxygen demand was 6.14 + 0.08 mg/L, biochemical oxygen demand was 0.892 + 0.12 mg/L, temperature was 26.82 + 0.49 0C, pH was 7.25 + 0.55, turbidity was 9.57 + 3.11 NTU, cholorophyll-a was 26.52 + 13.64 g/L. Comparison of pollutant and macrobentos quantity by seasonal change showed that they were significant affected by seasonal change. DO, turbidity, NH-N and suspended sediment but temperature, pH, BOD, NO2-N, NO3-N, species of macrobenthos and density of macrobentos were not significant affected by seasonal change. The relationship of water quality that affected macrobentos in Pattani River in the area of Yala Municipality was not found. Water quality of this investigated area is acceptable and free of pollutions but it should be closely monitored.