Considerable Bacterial Community Structure Coupling with Extracellular Electron Transfer at Karst Area Stone in Yunnan,China |
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| Authors: | Guiping Ren Yingchun Yan Manyi Sun Xiao Wang Xiaolei Wu Yan Li |
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| Institution: | 1. The Key Laboratory of Orogenic Belts and Crustal Evolution;2. Beijing Key Laboratory of Mineral Environmental Function, School of Earth and Space Sciences, Peking University, Beijing, China;3. Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu, China;4. College of Engineering, Peking University, Beijing, China |
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| Abstract: | Nearly all karst stones have partial dark and light color sections under the same condition. In this study, 24662 operational taxonomic units (OTUs) were examined from karst stones surface samples. Dark samples showed higher abundance of 18,115 OTUs (73.5%) and containing clustered bacterial communities, as indicated by the results of principal component and cluster analyses. Additionally, heatmap analysis showed microorganisms distinction between different color samples and 19 genera of electroactive microorganisms gathered in the dark samples. Furthermore, iron manganese oxides were detected as the main mineral composition difference. Notably, dark samples exhibited remarkable photoelectrochemical activity in response to visible light. Under sunlight, both microorganisms and minerals displayed close relationship with extracellular electron transfer process, which enhanced the understanding for microorganism-–mineral interactions in natural karst environments. |
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| Keywords: | Bacterial community electroactive microorganisms iron-manganese oxides karst |
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