Zhang Feng, Li Yaoming, Ji Baoming, Dong Shikui
School of Grassland Science, Beijing Forestry University, Beijing, China.
Front Plant Sci. 2024 Jun 20;15:1427850. doi: 10.3389/fpls.2024.1427850. eCollection 2024.
Arbuscular mycorrhizal fungi (AMF) are pivotal in plant resource acquisition, mediating plant interactions, and influencing soil carbon dynamics. However, their biogeographical distribution in Tibetan alpine grasslands remains understudied.
In this research, we examined the distribution pattern of AMF communities and their key determinants along a 2000-km transect across the Tibetan plateau, encompassing 7 alpine meadows and 8 alpine steppes.
Our findings indicate that AMF community diversity and composition exhibit similarities between alpine meadows and alpine steppes, primarily influenced by latitude and evapotranspiration. At the genus level, predominated in both alpine meadow (36.49%±2.67%) and alpine steppe (41.87%±2.36%) soils, followed by (27.14%±3.69%, 32.34%±3.28%). Furthermore, a significant decay relationship of AMF community was observed over geographical distance. Null model analyses revealed that random processes predominantly (>50%) drove the assembly of AMF communities.
In summary, our study elucidates the spatial distribution pattern of AMF in Tibetan plateau grasslands and underscores the significant influence of geographical and climatic factors on AMF community dynamics.
丛枝菌根真菌（AMF）在植物资源获取、介导植物相互作用以及影响土壤碳动态方面起着关键作用。然而，它们在青藏高原高寒草原的生物地理分布仍未得到充分研究。
在本研究中，我们沿着一条跨越青藏高原2000公里的样带，对7个高寒草甸和8个高寒草原的AMF群落分布模式及其关键决定因素进行了研究。
我们的研究结果表明，高寒草甸和高寒草原的AMF群落多样性和组成具有相似性，主要受纬度和蒸散量影响。在属水平上， 在高寒草甸（36.49%±2.67%）和高寒草原（41.87%±2.36%）土壤中均占主导地位，其次是 （分别为27.14%±3.69%、32.34%±3.28%）。此外，观察到AMF群落随地理距离呈现显著的衰减关系。零模型分析表明，随机过程（>50%）在AMF群落组装中起主要作用。
总之，我们的研究阐明了青藏高原草原AMF的空间分布模式，并强调了地理和气候因素对AMF群落动态的重大影响。
