【摘要】 以无震时期细菌群落及水文化学元素信息为背景,阐明有感地震时的泉水细菌群落映震特征.2010年12月—2011年4月,乌鲁木齐周边先后发生了MS3.1和MS3.6两次有感地震.本文采用末端限制性片段长度多态性法(T-RFLP)分析了该时间段内乌鲁木齐10号泉中细菌群落结构、多样性、稳定性、优势类群及特殊类群变化特征.结果表明,水文地球化学指标对有感地震不敏感,泉水细菌群落结构稳定,地震对其优势类群及多样性影响均不显著,但无震时期部分类群(以82,170,176,462bp为代表)在前后两次地震中丰度变化趋势相似,即震前有小幅上升,震后1—12天内出现极大值,之后丰度逐渐恢复至较低水平,且表现出与震级、震中距具有一定相关性.这表明部分泉水细菌对有感地震映震灵敏.更多还原

【Abstract】 The bacterial community structures and hydrogeochemical parameters in aseismic times provide the backdrop for illustrating the response of bacterial community to moderate and strong earthquakes.Water samples were collected from December 2010 to April 2011,during which period two felt earthquakes of MS3.1 and MS3.6 successively occurred near Urumqi.A terminal restriction fragment length polymorphism(T-RFLP) technique was used to analyze the bacterial community structures,diversity,stability and variations of the dominant groups and peculiar species under the seismic action.The results show that some peculiar species abundance generally appeared to vary in similar manners during the pre-and post-earthquake periods,hydrogeochemical parameters were insensitive to the earthquakes,bacterial community structures were stable and earthquakes did not significantly affect the dominant groups and their diversity.The abundance of peculiar species slightly increased in pre-earthquake times,the maximum value appeared within 1 to 12 days after the earthquakes,and then declined to a lower level.Besides,the variations were correlated to earthquake magnitude and epicenter distance.The results suggest that some bacterial species could sensitively respond to earthquakes.更多还原