生态学杂志2024，Vol.43Issue(6)：1681-1690,10.DOI:10.13292/j.1000-4890.202406.045
增温对青藏高原高寒草甸土壤微生物群落的影响
The impact of warming on soil microbial communities in an alpine meadow of the Qinghai-Tibet Plateau
摘要
Abstract
How climate warming impacts soil microbial diversity and composition has long been a focal point in the research area of biodiversity and ecosystem function.However,the extent to which different levels of warming affect soil microbial communities in alpine meadow ecosystems remains largely unknown.We conducted a field experiment with different warming levels(W1,W2 and W3 respectively represented a gradual increase in temperature)in an alpine meadow of Yushu,Qinghai Province,and investigated soil microbial communities using high-throughput sequencing.The results showed that:(1)Climate warming significantly increased soil bacterial α-diversity and β-diversity.Specifically,the Shannon index of soil bacteria was increased by 2.70％,3.87％,and 8.73％under the W1,W2,and W3 treatments,respectively,while the Chao1 index of soil bacteria was increased significantly by 17.82％under the W3 treatment(P＜0.05).(2)Acidobacteria and Proteobacteria were the dominant bacterial phyla,while Ascomycota and Basidiomycota were the dominant fungal phyla.As temperature increased,the abun-dance of bacterial taxa increased,whereas the fungal population decreased.(3)Functional prediction of bacteria and fungi based on the PICRUSt and FUNGuild databases revealed changes in the potential metabolic functions of bacteria and ecological functions of fungi after climate warming.Functional genes with relative abundances excee-ding 2％under different warming levels included Biosynthesis of ansamycins,Biosynthesis of vancomycin group,and Valine,leucine,and isoleucine biosynthesis pathways.Warming increased relative abundances of uncategorized saprotrophic fungi and arbuscular mycorrhizal fungi.These findings demonstrate that climate warming would alter soil microbial community diversity,composition,and function in alpine meadows of the Qinghai-Tibet Plateau.关键词
青藏高原/高寒草甸/气候变暖/土壤微生物群落/功能性预测Key words
Qinghai-Tibet Plateau/alpine meadow/climate warming/soil microbial community/functional predic-tion引用本文复制引用
向雪梅,德科加,林伟山,冯廷旭,李菲,魏希杰..增温对青藏高原高寒草甸土壤微生物群落的影响[J].生态学杂志,2024,43(6):1681-1690,10.基金项目
国家重点研发计划课题(2022YFD1602302)和青海省科技厅项目(K9922050)资助. （2022YFD1602302）
