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| 喀斯特地区土壤微生物功能多样性对生态演替的响应——以贵州茂兰国家自然保护区为例 | |
| 引用本文： | 喻文强, 许超, 米屹东, 周民, 魏源, 张音波, 龙颖贤, 赵鑫, 赵妍, 李信茹. 喀斯特地区土壤微生物功能多样性对生态演替的响应——以贵州茂兰国家自然保护区为例[J]. 地质通报, 2020, 39(4): 574-581. |
| 作者姓名： | 喻文强 许超 米屹东 周民 魏源 张音波 龙颖贤 赵鑫 赵妍 李信茹 |
| 作者单位： | 1.中国环境科学研究院环境基准与风险评估国家重点实验室, 北京 100012; 2.华南环境科学研究所环境管理与政策研究中心, 广东 广州 510655; 3.河海大学环境学院, 江苏 南京 210098 |
| 基金项目： | 科技部科研院所专项《AM真菌-苎麻联合修复复合重金属污染土壤的技术研发》（编号：2014EG166135） |
| 摘 要： |  利用BIOLOG ECO微平板法研究了喀斯特地区土壤微生物功能多样性对生态演替的响应情况。在研究区选取具有代表性的4个不同群落演替阶段：原生乔木林、次生乔灌混合林、灌丛、草坡，同时选择一个非喀斯特森林样地作为对照，对选取的不同生态系统土壤的微生物功能多样性进行研究。结果发现，随着乔木林逆向演替到灌丛的过程，微生物活性有逐渐降低的趋势，功能多样性对生态演替响应灵敏，土壤微生物在喀斯特地区比非喀斯特地区总体表现出更高的活性和丰富度，但群落均匀度较低，结构不稳定。主成分分析显示，演替使微生物的代谢模式产生了明显的分异，起主要分异作用的碳源是糖类、羧酸类和聚合物类。颜色变化率和主成分分析综合表明，演替进行到草坡阶段，较大的环境变化可能使土壤微生物采取了r-策略（r-strategistis）。根据逆向演替过程中土壤微生物功能多样性的变化，灌丛阶段可以视为岩溶生态系统整个演替阶段的阈值。 |
| 关 键 词： | 喀斯特 生态演替 微生物功能多样性 BIOLOG |
| 收稿时间： | 2019-05-24 |
| 修稿时间： | 2019-09-29 |
The response of soil microbial functional diversity to ecological succession in karst area: A case study of Maolan National Nature Reserve in Guizhou Province |
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| YU Wenqiang, XU Chao, MI Yidong, ZHOU Min, WEI Yuan, ZHANG Yinbo, LONG Yingxian, ZHAO Xin, ZHAO Yan, LI Xinru. The response of soil microbial functional diversity to ecological succession in karst area: A case study of Maolan National Nature Reserve in Guizhou Province[J]. Geological Bulletin of China, 2020, 39(4): 574-581. | |
| Authors: | YU Wenqiang XU Chao MI Yidong ZHOU Min WEI Yuan ZHANG Yinbo LONG Yingxian ZHAO Xin ZHAO Yan LI Xinru |
| Affiliation: | 1.State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy ofEnvironmental Sciences, Beijing 100012, China; 2.Environmental Management and Policy Research Center, South China Institute of Environmental Sciences. MEP, Guangzhou 510655, Guangdong, China; 3.College of Environment, Hohai University, Nanjing 210098, Jiangsu, China |
| Abstract: | The BIOLOG ECO-plate method was used to study the response of soil microbial functional diversity to ecological succession in karst area.In the study area, four different community succession stages were selected to study the microbial function diversity of soil, i.e., virgin arbor-forests, secondary arbor-shrub mixed forests, shrub, and grass-land, and a non-karst forests plot was selected as a control.The results show that, with the ecological succession of arbor-forest to shrub process, the microbial activity exhibits gradual decreasing tendency.The functional diversity is sensitive to response to the ecological succession.Soil microbes show higher activity and richness in karst areas than in non-karst areas, but the community uniformity is lower and the structure is more unstable.Principal component analysis shows that the succession causes significant differentiation of the metabolic patterns of microorganisms, and the carbon sources that play a major role in differentiation are sugars, carboxylic acids and polymers.According to the average well color development (AWCD) and principal component analysis, the authors hold that larger environmental changes may cause the soil microorganisms to adopt the r strategistis when the succession progresses to the grass slope stage.According to the change of soil microbial functional diversity during the reverse succession, the shrub stage can be regarded as the threshold of the entire succession stage of the karst ecosystem. |
| Keywords: | karst ecological succession microbial functional BIOLOG |
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