景观人工湿地微生物群落结构的季节变化

Microbial Community Changes in Reed Constructed Wetland in Different Seasons

采用PCR-DGGE技术对梦清园人工芦苇湿地不同季节的细菌群落变化进行了研究。结果表明,随着水体流动和季节更替,人工湿地中优势细菌一直在变化。测序结果显示芽孢杆菌在系统中较占优势,4个季节里都可以检测出来。恶臭假单胞菌在春夏秋3季比较有优势,而冬天枯草芽孢杆菌比较适合在该芦苇湿地中生存。经湿地处理后,水体细菌群落的多样性下降,相似性升高,部分细菌被淘汰出水体,但适应的细菌生长较快,整体细菌数量上升。对底泥的研究中,随运行时间的增加,进水口与出水口的细菌相似性分别下降,且进水口的相似性下降要明显快于出水口。

The microbial community in the constructed wetland of Mengqing Park was studied with PCR-DGGE in different seasons.The results of DGGE showed that the microbial structures had significant changes in different seasons,with the dominating bacteria changed also.Bacillus had been detected in four seasons,and the Bacillus subtilis was the dominating bacteria in winter.The diversity of microbial community in effluent was lower than in influent,with the similarity increase.But the vigorous growth of dominating bac...