Indirect influence of soil enzymes and their stoichiometry on soil organic carbon response to warming and nitrogen deposition in the Tibetan Plateau alpine meadow

• DOI: 10.3389/fmicb.2024.1381891
• Publication Date: 2024-04-17T05:23:56Z
• Authors: Xiang Xuemei; De Kejia; Lin Weishan; Feng Tingxu; Li Fei; Wei Xijie
• Keywords: Soil carbon; Deposition; Nitrogen Cycle; Carbon fibers; Stoichiometry

Despite extensive research on the impact of warming and nitrogen deposition soil organic carbon components, response mechanisms microbial community composition enzyme activity to remain poorly understood. This study investigated effects components in Tibetan Plateau alpine meadow elucidated regulatory characteristics, including community, activity, stoichiometry, components. Results indicated that both significantly increased carbon, readily oxidizable dissolved biomass carbon. The interaction between influenced with reaching maximum values W0N32 treatment, while peaked W3N32 treatment. Warming also Cellobiohydrolase, β-1,4-N-acetylglucosaminidase, leucine aminopeptidase, alkaline phosphatase. decreased C: N ratio C:P but N:P ratio, had opposite effect. bacterial Chao1 index Shannon under conditions, particularly N32 whereas there were no significant changes fungal addition. Structural equation modeling revealed directly by negative positive deposition. Furthermore, altered composition, specifically Gemmatimonadota Nitrospirota , resulting a phosphatase β-xylosidase, ratios. In summary, meadows primarily depend communities, stoichiometric characteristics.