生物多样性 ›› 2026, Vol. 34 ›› Issue (4): 25276.  DOI: 10.17520/biods.2025276  cstr: 32101.14.biods.2025276

• 研究报告: 微生物多样性 • 上一篇    下一篇

不同海拔巴山冷杉林土壤微生物多样性及植物-微生物跨界生态网络关系

李劲1,2(), 程铭昊1,2, 张溢1,2, 刘峰3, 姜庆虎3, 叶基荣4, 陈展1, 张于光1,2,*()   

  1. 1 中国林业科学研究院森林生态环境与自然保护研究所, 北京 100091
    2 生物多样性保护国家林业和草原局重点实验室, 北京 100091
    3 中国科学院武汉植物园, 武汉 430074
    4 云南大学国际河流与生态安全研究院, 昆明 650500
  • 收稿日期:2025-07-16 接受日期:2025-11-27 出版日期:2026-04-20 发布日期:2026-05-28
  • 通讯作者: 张于光
  • 基金资助:
    神农架国家公园本底资源综合调查研究项目(SNJNP2023010);神农架金丝猴保育生物学湖北省重点实验室开放课题基金(SNJGKL2023010)

Soil microbial diversity and plant-microbe inter-kingdom ecological networks across an elevational gradient in Abies fargesii forests

Jin Li1,2(), Minghao Cheng1,2, Yi Zhang1,2, Feng Liu3, Qinghu Jiang3, Jirong Ye4, Zhan Chen1, Yuguang Zhang1,2,*()   

  1. 1 Ecology and Nature Conservation Institute, Chinese Academy of Forestry, Beijing 100091, China
    2 Key Laboratory of Biodiversity Conservation, State Forestry and Grassland Administration, Beijing 100091, China
    3 Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China
    4 Institute of International Rivers and Eco-security, Yunnan University, Kunming 650500, China
  • Received:2025-07-16 Accepted:2025-11-27 Online:2026-04-20 Published:2026-05-28
  • Contact: Yuguang Zhang
  • Supported by:
    Project of Baseline Resources Survey in Shennongjia National Park(SNJNP2023010);the Open Project Fund of Hubei Provincial Key Laboratory for Conservation Biology of Shennongjia Snub-nosed Monkeys(SNJGKL2023010)

摘要:

土壤微生物是森林生态系统的重要组成部分, 在维系生态系统物质循环与能量流动等过程中发挥着关键作用。本研究以神农架国家公园候选区巴山冷杉(Abies fargesii)林为对象, 旨在揭示土壤微生物群落沿海拔梯度的变化规律及其驱动机制, 并解析植物-微生物跨界生态网络(inter-kingdom ecological networks, IDENs)特征。采用高通量测序, 并构建IDENs, 综合分析不同海拔巴山冷杉林土壤微生物多样性、群落结构及其与植物群落的关联。结果表明, 随海拔升高, 土壤全氮、土壤有机碳和年均降水量(mean annual precipitation, MAP)显著增加, 而土壤全磷、速效钾、植物物种丰富度以及植物Shannon指数显著降低(P<0.05); 细菌Shannon指数与丰富度指数随海拔升高显著下降(P<0.05), 真菌多样性无显著差异; 细菌优势菌门中, 仅酸杆菌门及其优势属(酸杆菌门亚群Gp2、Gp1和Gp3)相对丰度随海拔升高显著增加(P<0.05); 真菌优势菌门随海拔变化无显著差异, 但属水平红菇属(Russula)相对丰度显著升高、丝盖伞属(Inocybe)显著下降(P<0.05); 偏Mantel分析表明, 年均气温(mean annual temperature, MAT)与MAP是驱动土壤微生物群落变化的主要因子; 典范对应分析(canonical correspondence analysis, CCA)进一步显示, MAP与植物多样性对细菌和真菌群落结构影响最显著。IDENs子网络指标显示, 模块度、连通性和嵌套性随海拔升高显著上升(P<0.05), 高山杜鹃(Rhododendron lapponicum)和四蕊槭(Acer stachyophyllum subsp. betulifolium)等植物是模块枢纽的主要组成部分, 巴山冷杉在植物-真菌IDENs中占据网络枢纽的重要地位。本研究揭示了不同海拔巴山冷杉林土壤微生物群落结构及其主要影响因素, 识别了植物-微生物IDENs的关键特征, 可为理解森林生态系统中植物-微生物互作关系提供科学参考。

关键词: 巴山冷杉, 土壤微生物群落, 海拔梯度, 植物-微生物跨界生态网络, 神农架国家公园候选区

Abstract

Aims: The objectives of this study were to investigate the elevational patterns and driving factors of soil microbial diversity and community composition in Abies fargesii forests in Shennongjia National Park candidate area, and to analyze the relationships between soil microbial communities and plant communities along the elevational gradient.
Methods: This study was conducted in A. fargesii forests in Shennongjia National Park candidate area. Soil samples were collected along an elevational gradient. High-throughput sequencing was used to analyze the diversity and community composition of soil bacterial and fungal communities. In addition, inter-kingdom ecological networks (IDENs) were constructed to examine the characteristics of soil microbial communities and their relationships with plant communities across different elevations.
Results: With increasing elevation, total nitrogen, soil organic carbon, and mean annual precipitation (MAP) significantly increased, whereas soil total phosphorus (TP), available potassium (AK), plant richness, and the plant Shannon index significantly decreased (P<0.05). Bacterial Shannon index and richness significantly declined with increasing elevation (P<0.05), while fungal diversity indices showed no significant change. Among dominant bacterial phyla, the relative abundance of Acidobacteriota, particularly subgroups Gp2, Gp1, and Gp3, increased significantly with increasing elevation (P<0.05). Dominant fungal phyla showed no significant elevational trends, but Russula increased and Inocybe decreased at the genus level (P<0.05). Partial Mantel tests indicated that mean annual temperature (MAT) and MAP were the main drivers of microbial community variation, and canonical correspondence analysis (CCA) further showed that MAP and plant diversity significantly shaped bacterial and fungal community structures. Network modularity, connectance, and nestedness increased significantly along the elevational gradient (P<0.05). Rhododendron lapponicum and Acer stachyophyllum subsp. betulifolium were the main plant components of module hubs in the plant-microbe IDENs, whereas A. fargesii occupied a central position as a network hub in the plant-fungal IDENs.
Conclusion: Soil microbial communities in A. fargesii forests exhibit clear elevational patterns. With increasing elevation, bacterial diversity decreases significantly, whereas fungal diversity remains relatively stable. MAT, MAP, and plant diversity are important drivers shaping microbial community structure. In addition, the connectance and modularity of plant-microbe IDENs increase significantly with increasing elevation. Plants act as network hub species and, together with key microbial taxa involved in decomposition and nutrient cycling, jointly maintain the structural and functional stability of plant-microbe interaction networks.

Key words: Abies fargesii, soil microbial community, elevational gradient, plant-microbe inter-kingdom ecological networks, Shennongjia National Park candidate area