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DOI码：10.3389/fmicb.2023.1105723

发表刊物：Frontiers in Microbiology

关键字：climate change, carbon cycle, soil microbial activity, microbial decomposition model, soilrespiration (CO2)

摘要：Soil microorganisms are critical biological indicators for evaluating soil health andplay a vital role in carbon (C)-climate feedback. In recent years, the accuracy ofmodels in terms of predicting soil C pools has been improved by considering theinvolvement of microbes in the decomposition process in ecosystem models, butthe parameter values of these models have been assumed by researchers withoutcombining observed data with the models and without calibrating the microbialdecomposition models. Here, we conducted an observational experiment from April2021 to July 2022 in the Ziwuling Mountains, Loess Plateau, China, to explore themain influencing factors of soil respiration (R S) and determine which parameterscan be incorporated into microbial decomposition models. The results showedthat the R S rate is significantly correlated with soil temperature (TS) and moisture(MS), indicating that T S increases soil C loss. We attributed the non-significantcorrelation between R S and soil microbial biomass carbon (MBC) to variations inmicrobial use efficiency, which mitigated ecosystem C loss by reducing the abilityof microorganisms to decompose organic resources at high temperatures. Thestructural equation modeling (SEM) results demonstrated that TS, microbial biomass,and enzyme activity are crucial factors affecting soil microbial activity. Our studyrevealed the relations between TS, microbial biomass, enzyme activity, and RS, whichhad important scientific implications for constructing microbial decompositionmodels that predict soil microbial activity under climate change in the future. Tobetter understand the relationship between soil dynamics and C emissions, it willbe necessary to incorporate climate data as well as RS and microbial parameters intomicrobial decomposition models, which will be important for soil conservation andreducing soil C loss in the Loess Plateau (PDF) Soil temperature, microbial biomass and enzyme activity are the critical factors affecting soil respiration in different soil layers in Ziwuling Mountains, China. Available from: https://www.researchgate.net/publication/368580836_Soil_temperature_microbial_biomass_and_enzyme_activity_are_the_critical_factors_affecting_soil_respiration_in_different_soil_layers_in_Ziwuling_Mountains_China [accessed Jan 05 2024].

论文类型：文章

是否译文：否

发表时间：2023-02-16

收录刊物：SCI

第一作者：Ruosong Qu

通讯作者：Kefeng Wang

合写作者：Guanzhen Liu

合写作者：Ming Yue

合写作者：Gangsheng Wang

合写作者：Changhui Peng

合写作者：Xiaoping Gao