Diversity of Macroalgae and some Water Quality Parameters in Huay Tham Khae Reservoir, Trakan Phuet Phon District, Ubon Ratchathani Province

Abstract

This research was conducted to study macroalgae diversity and some water quality parameters in Huay Tham Khae Reservoir, Trakan Phuet Phon District, Ubon Ratchathani Province. The samples were collected from March to September 2013 in 3 seasons at different 10 stations in triplicate. Water samples were analyzed for some water quality parameters. The results showed that the dominant macroalgae species were Spirogyra sp. 1; this was followed by Spirogyra sp. 2, Oedogonium sp. 1, Microspora sp. and Spondylosium sp. The average observed values of water quality parameters were air temperature of 29.3°C, water temperature of 28.0°C, pH 6.56, DO of 7.95 mg/l, BOD5 of .02 mg/l, Secchi depth of 109.2 cm, conductivity of 47.94 μs/cm, alkalinity of 25.58 mg/l, chlorophyll a content of 5.4 μg/l, orthophosphate content of 0.024 mg/l, nitrate content of 0.039 mg/l, total coliform bacteria of 300 MPN/100 ml and fecal coliform bacteria of 208.05 MPN/100 ml. The water quality in Huay Tham Khae Reservoir was classified
as oligo-mesotrophic and categorized as class 2 to 3 of standard surface water. The result of PCA revealed that Spirogyra sp. 2 was positively correlated with chlorophyll a.