Abstract Knowledge of the impacts of prescribed burning on ecosystem functions could help to improve forest management practices. However, relative to forest safety and aesthetic values, changes in soil properties and processes after prescribed burning are not well understood. This study aimed to quantify changes in soil microbial communities and greenhouse gas emissions following prescribed burning in a subtropical suburban forest. The soil microbial communities were determined with the Illumina sequencing methods. Carbon dioxide (CO2), nitrous oxide (N2O) and methane (CH4) emissions were quantified under three different soil water contents, and net greenhouse gas emissions were derived from emissions of the three gases after 7 days of incubation and expressed in CO2-equivalent. Prescribed burning had negligible impacts on soil bacterial and fungal community diversities but significantly changed soil microbial community structures. Compared to the unburnt soil, the relative abundances of Chloroflexi increased by 86% and 119% one month and three months after the prescribed burning, respectively. However, the relative abundances of Mortierellomycota decreased by 94% one month after prescribed burning. At different soil water contents, The CO2 and N2O emissions during a 7-day laboratory incubation did not differ consistently or significantly between the soils collected before/after the prescribed burning. Simultaneously, there were no significant changes in net greenhouse gas emissions from soil in association with the prescribed burning. The results revealed that relative to the unburned soils, prescribed burning caused minor alterations in net soil greenhouse gas fluxes, despite short-term evident changes in soil microbial community structures.

中文翻译：

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规定燃烧对城市森林土壤的影响：尽管微生物群落结构发生了明显变化，但温室气体净排放量的微小变化

摘要 了解规定的燃烧对生态系统功能的影响有助于改进森林管理实践。然而，相对于森林安全和美学价值，规定燃烧后土壤性质和过程的变化尚不清楚。本研究旨在量化亚热带郊区森林中规定的燃烧后土壤微生物群落和温室气体排放的变化。土壤微生物群落通过Illumina测序方法确定。二氧化碳 (CO2)、一氧化二氮 (N2O) 和甲烷 (CH4) 排放量在三种不同土壤含水量下进行量化，温室气体净排放量来自孵化 7 天后三种气体的排放量，并以 CO2 当量表示. 规定的燃烧对土壤细菌和真菌群落多样性的影响可以忽略不计，但显着改变了土壤微生物群落结构。与未燃烧的土壤相比，在规定的燃烧后 1 个月和 3 个月，Chloroflexi 的相对丰度分别增加了 86% 和 119%。然而，在规定的燃烧后一个月，Mortierellomycota 的相对丰度下降了 94%。在不同的土壤含水量下，在 7 天的实验室孵化期间，在规定的燃烧之前/之后收集的土壤之间的 CO2 和 N2O 排放没有一致或显着差异。同时，与规定的燃烧相关的土壤温室气体净排放量没有显着变化。结果表明，相对于未燃烧的土壤，