利用T-RFLP技术对温榆河微生物群落结构研究

利用T-RFLP技术(综合运用PCR技术、DNA限制性酶切技术和DNA序列自动分析技术)对温榆河不同尺度、不同时期的微生物群落结构进行了研究.从微生物的种类数、物种丰度、优势菌落、群落结构稳定性等方面特征着手,找出其优势群落;利用两种多样性指数(香侬一威勒多样性指数、辛普森多样性指数)探讨各种微生物群落结构的多样性以及同一群落随时间而发生的变化;比较了微生物指标与水质指标COD之间的变化关系.结果表明,温榆河不同尺度、不同时期的微生物具有明显变化,说明季节性变化对水体中微生物群落产生了明显的影响;T-RF67bp、151bp、440bp、481bp、488bp所代表的微生物群落体现其为优势种群; T-RF为135bp、151bp、440bp的微生物群落对于外界反映最敏感,验证其有可能能作为环境变化的指示性生物;微生物指标与COD呈现明显的正相关.

Study of micro-ecosystem of the Wenyu River by terminal restriction fragment length polymorphism analysis

The micro-ecology of Wenyu River in different scales and periods was researched by T-RFLP method.We found its dominant communities based on several factors: the number of species,species abundance,dominant colonies,the stability of community structure of the micro-organisms,etc.And then we studied the diversity of every microbial community structures,as well as the variation over different times of the same one community.Finally,we examined the relevance between the microbial indicators and water quality ob...