土壤自养固碳微生物研究进展与热点分析

Analysis on Progress and Hotspots of Research on Carbon Dioxide Fixation by Autotrophic Microorganisms in Soils

随着全球气候变暖加剧,减少大气中二氧化碳(CO_(2))排放量、提高陆地生态系统碳储量已成为全球关注的焦点。土壤中存在大量自养微生物,具有将大气中CO_(2)转化成有机物质的能力,对提高土壤碳吸收和碳储量有重要意义。探究土壤自养固碳微生物研究的发展与趋势,展示其知识结构和知识演化过程,可为后续研究提供参考和启示。采用VOSviewer软件对1991—2023年发表在Web of Science核心合集数据库中的文献进行分析,通过分析发文量、作者合作共现、机构合作、国家分布、关键词共现及关键词聚类和演变趋势等,系统梳理土壤自养固碳微生物研究的现状与发展趋势。结果表明,土壤自养固碳微生物研究在2016年后蓬勃发展,中国和美国学者是重要的研究力量;中国为发文量最多的国家,中国科学院为发文量最多的研究机构。热门的研究方向为自养微生物固碳潜力、固碳途径、功能种群及其固碳过程的调控机制等。在系统阐述土壤自养固碳微生物研究发展态势基础上,提出未来可能的重要研究方向,有助于该研究的发展。

With intensification of global warming,reducing atmospheric CO_(2) emissions and improving carbon storages in terrestrial ecosystems have become focuses of global attention.Autotrophic microorganisms with abilities to convert atmospheric CO_(2) into organic matters are widely presented in soils,and play important roles in improving carbon absorption and storages in soils.Exploring developments and trends of research on carbon dioxide fixation by autotrophic microorganisms in soils and demonstrating knowledge structure and knowledge evolution process in the research can provide references and insights for subsequent studies.VOSviewer software was used to analyze literature in Web of Science core collection database from 1991 to 2023.Number of publications,author co-occurrence,institution cooperation,country distribution,key word co-occurrence,key word clustering and evolution trends were analyzed to systematically sort out current status and development trends of research on carbon dioxide fixation by autotrophic microorganisms in soils.Results showed that research on carbon dioxide fixation by autotrophic microorganisms in soils flourished after 2016.Chinese and American scholars were important research forces.China was country with the largest number of publications,and Chinese Academy of Sciences was research institution with the largest number of publications.Popular research directions were carbon fixation potentials,carbon fixation pathways,functional groups and carbon fixation process regulating mechanisms of autotrophic microorganisms.Based on systematic elaboration of development trends of research on carbon dioxide fixation by autotrophic microorganisms in soils,important research directions in the future were proposed,which could contribute to development of the research.