Correlation of Environmental Factors with Bacterial Community Structure and Function of River Water Flowing Through Urban Areas in Upper Reaches of Baiyangdian Lake
Due to the importance of bacterial for aquatic ecological environment,the study of the bacterial commu-nity structure and function can provide technical support for water ecological pollution monitoring and controlling.Based on high-throughput sequencing of bacterial communities and monitoring of environmental factors of urban area in the upper reaches of Baiyangdian Lake,the impact of urban environmental factors on water quality was analyzed,and the relationship between the bacterial community structure and dynamic changes of some indicative pollutants was systematically explored.The results indicated that the urban area had a significant impact on the eco-logical environment,and obvious different water quality levels were observed between the upstream,middle and downstream of an urban area upper reaches of Baiyangdian Lake.The various pollutants from the city not only affected the bacterial community structure,but also reduced the population of high abundance bacterial and increased the diversity of bacterial communities in heavily polluted watersheds.Furthermore,they were also closely related to the nitrate and phosphate metabolism functions of bacterial communities.It was also noticed that the bacterial community structure and some nitrogen and phosphorus metabolism functions in the downstream have shown a trend of returning to that of the upstream,given the various pollutants imposed in the urban area.In addition,the high abundance Flavobacterium was greatly inhibited by various bacterial communities and pollutants,with a strong correlation with NO3--N pollutants as verified in this research.The study on the correlation between the structure and function of bacterial communities and the dynamic changes of environmental factors before and after flowing through the urban area provides a theoretical basis for ecological environment protection and pollution control in the Baiyangdian basin.
Baiyangdian Lakeupper reachesflowing through urban areasbacterial communitystructure and functiondynamic changes
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