Carbon‐Fixing Bacterial Network Complexity Mediates Soil Multifunctionality in a Panax notoginseng ‐ Pinus armandii Agroforestry System
Bibliographic Data
| ID | 22420889 |
|---|---|
| Authors | Jingying Hei (0009-0009-8777-6197, College of Landscape Architecture and Horticulture Southwest Forestry University Kunming China), Rui Rui (College of Landscape Architecture and Horticulture Southwest Forestry University Kunming China), Shu Wang (0009-0009-1730-2316, College of Landscape Architecture and Horticulture Southwest Forestry University Kunming China), Wang Shu (0000-0002-2282-468X, Southwest Forestry University, corresponding author), Xiahong He (Key Laboratory of in‐Forest Resource Protection and Utilization in Yunnan Province Southwest Forestry University Kunming China, corresponding author) |
| Year | 2026 |
| Publication date | 2026-07-10 |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | Land Degradation and Development (JOURNAL) |
| Journal identifiers | ISSN: 1085-3278 • E-ISSN: 1099-145X |
| Publisher | Wiley (PUBLISHER • GB) |
| DOI | 10.1002/ldr.70801 |
| OpenAlex | W7167937285 |
| Language | EN |
| References cited | 81 |
Autotrophic carbon‐fixing bacteria (CFB) are central contributors to soil carbon sequestration and biogeochemical carbon cycling in agroforestry ecosystems and can act as reliable biological indicators for evaluating agroforestry ecosystem sustainability. However, how the conversion of monoculture Pinus armandii (MP) to Panax notoginseng (Sanqi)‐ Pinus armandii agroforestry (SPA) system affects CFB communities and soil multifunctionality remains largely unclear. Here, we quantified the variations in CFB abundance, community diversity, and composition across MP and SPA systems using quantitative real‐time polymerase chain reaction (qPCR) and high‐throughput sequencing technology. The results demonstrated that the SPA system significantly reduced CFB abundance but increased β‐diversity in Sanqi and P. armandii soils, respectively. For Sanqi rhizosphere soil, CFB α‐diversity was also remarkably elevated, with Shannon and Chao1 indices increasing by 20.18% and 28.57%, respectively. Main effect analysis showed that seasonal dynamics explained the majority of the variation in CFB abundance ( η 2 = 0.27), while Sanqi introduction dominated the variation associated with CFB β‐diversity ( η 2 = 0.92). The abundance of Bradyrhizobium was markedly enriched in Sanqi rhizosphere soil rather than P. armandii soil. Furthermore, the SPA system increased the CFB network complexity by 9.10% in pine soil and 29.37% in Sanqi soil and improved the CFB network stability in pine soil. Structural equation modeling (SEM) showed that soil multifunctionality was closely associated with CFB network complexity. Overall, our study provides novel insights into the regulatory role of CFB in maintaining soil ecosystem functions during the transition from the MP to the SPA system.
Autotroph · Carbon sequestration · Ecosystem · Forest ecology · Monoculture · Rhizosphere · Soil carbon · Microbial Community Ecology and Physiology · Mycorrhizal Fungi and Plant Interactions · Soil Carbon and Nitrogen Dynamics
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| Highly cited | No |
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