中文摘要：

地调查被进行在三座峡水库的水水平变化地区的土壤学习全部的 culturable 细菌(TCB ) 和它与甲基水银(MeHg ) 的关系的时间、空间的分发特征。不同高度(170180， 170175， 165170 和 160165 ? m ) 在里面 Zhenxi (地点 1 ) ， Shibaozhai (地点 2 ) 和 Tujing (地点 3 ) ，重庆，中国被选择为采样地点。结果显示 TCB 没在顶有重要差别( 010 ?厘米)并且潜水艇( 1020 ?厘米)非淹没的区域的土壤( 175180 ? m )，但是在水水平变化地区显示出重要差别(< 175 ? m ，建议水铺平变化在 TCB 上有重要效果。而且，，在地点 1 和 2 的各种各样的高度的土壤的 TCB 为地点 3 有重要差别，这差别不是重要的。并且在地点 2 的 TCB 的差别在地点 1 比那大得多。这些结果建议为在主流和支流的土壤的 TCB 有重要差别。另外，在 1020 的土壤的 TCB ? 厘米与 MeHg 水平有重要或高度重要的积极关联(r ?? 0.762， P ?? 0.048 ) ，因此，我们假设可以有一些氧气的微生物，在水银 methylation 起主导的作用。

英文摘要：

Field investigations were conducted to study the temporal and spatial distribution characteristics of total culturable bacteria （TCB） and its relationship with methylmercury （MeHg） in the soils of the water level fluctuation zone of the Three Gorges Reservoir. Different altitudes （170-180, 170-175, 165-170 and 160-165 m） in Zhenxi （Site 1）, Shibaozhai （Site 2） and Tujing （Site 3）, Chongqing, China were chosen as sampling sites. Results indicated that TCB did not have significant difference in the top （0-10 cm） and sub （10-20 cm） soil of the non-inundated area （175-180 m）, but showing a significant difference in the water level fluctuation zone （〈175 m, suggesting that water level fluctuation had an important effect on TCB.Moreover, TCB in soils of various altitudes of Site 1 and 2 had significant difference, while for Site 3, this difference was not significant. And the difference of TCB in Site 2 was much greater than that in Site 1. These results suggested that there were significant differences for TCB in soils of mainstream and tributaries. In addition, TCB in soils of 10-20 cm had significant or highly significant positive correlations with MeHg level （r ≥ 0.762, P ≤ 0.048）, thus we assumed that there may be some aerobic microorganisms playing dominant roles in mercury methylation.