Research on the Characteristics of Benthic Diatom in the Longjiang River in Guangxi and Its Relationships with Heavy Metals Ions Pollution

Abstract

This paper performs sampling and analysis of benthic diatom communities in the Longjiang River in Guangxi province in both May and July. The positive correlation between dominant diatom communities and the contents of heavy metals in the water were obtained by analyzing water quality monitoring data. The major influencing factors of the heavy metal ion to the benthic diatom in the Longjiang River are the contents of Cd and Zn ions. Temperature does not have great influences on the dominant benthic diatom communities. According to the classification of ecological diatom communities, the diatom communities at various sampling points of the Longjiang River are the indicator species of polluted water. The significant correlations between the investigated diatom communities and water quality indicates that benthic diatom is very sensitive to heavy metals in water.