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| Knowledge Map Construction in Soil Microbiology Research: Hotspot Clustering and Paradigm Evolution (1999~2024) |
| MA Ya-Ran1, GAO Ya-Miao1, NAN Xiong-Xiong2, ZHU Li-Zhen2, WANG Fang1,2,* |
1 School of Geography and Planning/China-Arab Joint International Research Laboratory for Featured Resources and Environmental Governance in Arid Regions, Ningxia University, Yinchuan 750021, China;
2 National Key Laboratory of Efficient Production of Forest Resources, Yinchuan 750004, China |
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Abstract Soil microorganisms play a pivotal role in biogeochemical cycles. Understanding the evolution of research paradigms in this field is essential to advancing ecological theory and facilitating sustainable agriculture. To delineate the research trajectory and emerging frontiers of soil microbiology, this study compiled a comprehensive dataset encompassing 28 000 Chinese and English publications (1999~2024) from the WOS (Web of Science) core collection and China National Knowledge Infrastructure (CNKI). Using multi-metric analysis and knowledge mapping tools (VOSviewer and CiteSpace), keyword co-occurrence clustering, burst detection, and timeline analysis were conducted. The results indicated the following: (1) Global knowledge output in this field expanded substantially, with English-language literature growing at an average annual rate of 6.85%, while Chinese publications experienced accelerated growth since 2020. (2) Research hotspots clustered around 5 major thematic areas: Nutrient cycling, pollution remediation, community characteristics, environmental dynamics, and climate regulation. (3) Keyword burst analysis identified a three-stage paradigm shift: An initial focus on diversity characterization (1999~2010), a transition to metagenome-driven exploration (2011~2018), and a recent emphasis on interaction networks and multifunctional mechanisms (2019~2024). Future research should prioritize multi-scale dynamic monitoring of soil microbiomes, the mechanisms of functional redundancy under global change, and AI-enabled modeling of microbial interaction networks. The developed "hotspot-trend-frontier" analytical framework provides theoretical and methodological support for optimizing research strategies in soil microbiology and guiding ecological restoration practices.
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Received: 16 September 2025
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Corresponding Authors:
*fangwang0820@nxu.edu.cn
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