Divergent responses and roles of soil bacterial and fungal communities in shrub encroachment: A meta-analysis

IF 5.4 1区农林科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY

Catena Pub Date : 2025-03-12 DOI:10.1016/j.catena.2025.108926

Yingjie Zhu , Liming Lai , Jihua Zhou , Qiaoe Chen , Yanpeng Yue , Ganggang Yang , Hui Du , Yuanrun Zheng

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Abstract

Aims

Shrub encroachment, a global phenomenon, not only alters aboveground biodiversity but also affects belowground soil microbial community structure and composition. This study aims to investigate the effects of shrub encroachment on soil microbial communities and explore the underlying mechanisms.

Methods

A meta-analysis of 180 sets of observational data from 69 published studies worldwide was conducted to assess the influence of shrub encroachment on soil microbial communities and their response mechanisms.

Results

Shrub encroachment significantly increased soil total PLFA (3.8 %), with no significant change in fungal biomass. Shrub encroachment increased both bacterial and fungal diversity, with a stronger influence on fungal diversity (7.2 %) than on bacterial diversity (4.3 %). Moreover, the effects of shrub encroachment on soil microorganisms differed across climate zones, seasons, and soil depths. Structural equation modeling suggested that bacterial diversity increased with soil organic carbon and decreased with soil water content under shrub encroachment, whereas decreasing pH significantly enhanced fungal diversity.

Conclusions

This study demonstrated that shrub encroachment significantly influenced soil microbial communities, leading to changes in microbial diversity and composition. Soil physical and chemical properties and climatic factors jointly regulate the effects of shrub encroachment on soil microbial communities.

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来源期刊

Catena 环境科学-地球科学综合

CiteScore

10.50

自引率

9.70%

发文量

816

审稿时长

54 days

期刊介绍： Catena publishes papers describing original field and laboratory investigations and reviews on geoecology and landscape evolution with emphasis on interdisciplinary aspects of soil science, hydrology and geomorphology. It aims to disseminate new knowledge and foster better understanding of the physical environment, of evolutionary sequences that have resulted in past and current landscapes, and of the natural processes that are likely to determine the fate of our terrestrial environment. Papers within any one of the above topics are welcome provided they are of sufficiently wide interest and relevance.