This study was conducted to assess the natural radiation intensity of radon observed from ‘G’ islands and its effects against Bacillus pumilus, predominantly found throughout the field survey. The physicochemical properties and microbial characteristics were simultaneously investigated and compared. From these studies, it was confirmed that the areal distribution of radon concentration varied from 920 Bq/m³ to 3367 Bq/m³ depending on the soil depth, lithology, or geophysicochemical properties (including pH, moisture content, and grain size) inherently subject to each location. Particularly, the slightly acidic (pH < 6) and low-fertility soil with a higher level of radon concentration exceeding 3000 Bq/m³ had a considerably low level of bacterial density. In contrast, the fertile soil of a relatively middle level of radon radioactivity revealed a much larger bacterial community density, dominated by Bacillus spp., Pseudomonas sp., Paenarthrobacter sp., and Microbacterium sp. Furthermore, the monitored metabolic activity and growth of Bacillus pumilus against the various radon exposure conditions clearly indicated that radon could be considered as the potential ecological risk to natural environmental habitats of microbial soil biota.

这项研究的目的是评估从“ G”岛观察到的ra的自然辐射强度及其对短小芽孢杆菌的影响，这些辐射主要在整个田野调查中发现。同时对理化特性和微生物特性进行了研究和比较。从这些研究中，可以确定ra浓度的面积分布从920 Bq / m ³到3367 Bq / m ³不等，这取决于土壤的深度，岩性或地球物理化学性质（包括pH，水分含量和粒度）。取决于每个位置。特别是，酸含量高（超过3000 Bq / m ³）的弱酸性（pH <6）和低肥力土壤细菌密度很低。相比之下，of放射性水平相对中等的肥沃土壤显示出更大的细菌群落密度，主要由芽孢杆菌属，假单胞菌属，潘氏杆菌属和微杆菌属所主导。此外，针对各种ra暴露条件监测的短小芽孢杆菌的代谢活性和生长清楚地表明，could可被视为对微生物土壤生物的自然环境栖息地的潜在生态风险。