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| Study on soil bacterial community under sealed CO2 leakage scenarios by high-throughput sequencing technology |
| Received:June 22, 2016 |
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| KeyWord:geological storage of CO2;CO2 leakage;maize;physiological characteristics;high-throughput sequencing;soil bacterial community |
| Author Name | Affiliation | E-mail | | ZHANG Hui-hui | Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region, Ministry of Education, School of Environmental Science and Engineering, Chang'an University, Xi'an 710054, China | | | LI Chun-rong | Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region, Ministry of Education, School of Environmental Science and Engineering, Chang'an University, Xi'an 710054, China | changanl@163.com | | WANG Wen-ke | Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region, Ministry of Education, School of Environmental Science and Engineering, Chang'an University, Xi'an 710054, China | | | DENG Hong-zhang | Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region, Ministry of Education, School of Environmental Science and Engineering, Chang'an University, Xi'an 710054, China | | | ZHANG Hui | Center for Hydrogeology and Environmental Geology Survey, China Geological Survey, Baoding 071051, China | | | HAN Feng | Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region, Ministry of Education, School of Environmental Science and Engineering, Chang'an University, Xi'an 710054, China | |
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| Abstract: |
| The CO2 geological storage technology carries a risk of the sealed CO2 leakage due to the complexity of the storage process, which might affect soil ecosystem. The response of maize to the leakage scenarios of sealed CO2 was studied by an artificial CO2 release system,and the bacterial community and genetic diversity in soils were analyzed by high-throughput sequencing technology. The results showed that:Maize adapted to 30×104 μL·L-1 CO2 scenarios; but more than 40×104 μL·L-1 CO2 showed a stress on some physiological indexes of maize leaves and so on. There were a total of 70948 OTUs for four soil samples by high-throughput sequencing technology, but only 3.32% of OTUs were common under different CO2 leakage scenarios. Changes in soil bacterial diversity and richness were related to CO2 leakage levels. Proteobacteria, Bacteroidetes, and Acidobacteria etc. were dominant species in soils. A significant increase in relative abundance of Acidobacteria under 40×104 μL·L-1 CO2 concentration suggested that it might be an indicator bacteria for the impact of sealed CO2 leakage on soil ecosystem. Overall, CO2 leakage would affect crop growth and soil microbial community, and changes in microbial diversity might affect functions of agro-ecosystem. This study is important for the establishment of geological CO2 sequestration leakage coping technology. |
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