文献类型：期刊文献

英文题名：Soil microbial community co-occurrence network structure and its drivers in arid mountainous areas

作者：Zhou, Ziyuan[1,6] Wang, Genzhu[5] Wu, Mengyao[4] Ma, Wenchang[1,2,3] Li, Xuebin[1,4] Chen, Yinglong[7] Chen, Lin[1,2,3] Pang, Danbo[1,2,3]

第一作者：Zhou, Ziyuan;周子渊

通信作者：Chen, L[1];Pang, DB[1]

机构：[1]Ningxia Univ, Breeding Base State Key Lab Land Degradat & Ecol R, 489 Helan West Rd, Yinchuan 750021, Peoples R China;[2]Ningxia Univ, Key Lab Restorat & Reconstruct Degraded Ecosyst No, Minist Educ, Yinchuan 750021, Peoples R China;[3]Ningxia Univ, Sch Ecol & Environm, Yinchuan 750021, Peoples R China;[4]Ningxia Univ, Coll Forestry & Prataculture, Yinchuan 750021, Peoples R China;[5]China Inst Water Resources & Hydropower Res, Inst Sediment Res, Beijing 100038, Peoples R China;[6]Chinese Acad Forestry, Expt Ctr Forestry North China, Beijing 102300, Peoples R China;[7]Univ Western Australia, Perth, WA 6009, Australia

年份：2026

卷号：218

外文期刊名：APPLIED SOIL ECOLOGY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001656142300001)】；

基金：This work was funded by the National Natural Science Foundation of China (32201631, 32371964, 32360423) , the Key Research and Development Project of Ningxia Hui Autonomous Region (2023BEG02049, 2024AAC01004, 2024AAC03101) .

语种：英文

外文关键词：Mountain ecosystems; Arid zones; Soil microbial community; Different elevations; Community stability

摘要：Soil microbial communities are a key component of mountain ecosystems in arid zones. However, their changing patterns along altitudinal gradients remain unclear, hindering the understanding of mountain soil ecosystems in arid areas. In this study, soil samples were collected from the western slope of Helan Mountain, northwest China at different elevations (1800-3000 m), and plant diversity, soil physicochemical properties, soil microorganisms were measured at various elevations to further investigate the regulation of soil microbial communities. The results showed that the species richness (Chao1 index) of soil bacterial and fungal communities exhibited a generally similar pattern, they were lower in the desert steppe at low elevations, significantly increased in the arboreal forest at mid-elevations, and then gradually decreased as elevation increased toward the alpine meadow. Random forest models identified soil pH, soil organic carbon (SOC), elevation as the strongest predictors of bacterial Alpha diversity (Chao1: R-2 = 0.18, Shannon: R-2 = 0.20; P < 0.001) and community composition (R-2 = 0.67, P < 0.001). In contrast, fungal richness (Chao1) was mainly driven by soil water content (SWC), elevation, SOC (R-2 = 0.35, P < 0.001), while fungal diversity (Shannon) was governed by SWC, SOC and elevation (R-2 = 0.12; P < 0.001). Across vegetation types, fungal community composition mirrored bacterial patterns and was primarily controlled by elevation, SOC, SWC, total phosphorus, bulk density and ammonium nitrogen (R-2 = 0.69; P < 0.001). Bacterial co-occurrence networks were highly modular in the arboreal woodland (Modularity >0.9), with strong positive correlations between core bacterial phyla (Positive links >60 %), contributing to community stability. Core taxa such as Ascomycota and Basidiomycota dominated the network structure and community stability in fungal co-occurrence networks. Changes in elevation, vegetation type, and soil factors significantly affected the topology of the co-occurrence network, and the interaction characteristics of bacterial and fungal co-occurrence networks differed. This study deepens the understanding of soil microbial communities in mountainous areas of arid zones and contributes to the sustainable development and conservation of ecosystems in this region.