pH is the measurement of acidity and alkalinity of water bodies with accordance to the concentration of hydrogen ions that are present in the water. pH values lower than 7 is indicated as acidic while values higher than 7 is alkaline. pH also have influence on the toxicity level of several nutrients such as ammonia concentration,
which will turn toxic to aquatic organism in low pH. pH values were observed changing from slightly alkaline to alkaline condition in the surface and bottom layers in the mangroves areas.
Nutrient loadings from human induced activities and the decompositions of dead aquatic organisms will produce ammonia, which induced alkaline condition.
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