Soil nitrogen availability drives the response of soil microbial biomass to warming

文献类型： 外文期刊

第一作者： Li, Shucheng

作者： Li, Shucheng;Tang, Shiming;Jin, Ke;Chen, Hongyang

作者机构：

关键词： Meta-analysis; Soil microbial biomass; Warming; Soil nitrogen availability; Soil moisture

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：9.8； 五年影响因子：9.6 ）

ISSN： 0048-9697

年卷期： 2024 年 917 卷

页码：

收录情况： SCI

摘要： Although soil microbial biomass responses to experimental warming have been extensively studied, the mechanisms through which elevated temperatures influence soil microbial biomass remain unclear. In this study, we performed a global meta -analysis to quantify the global pattern of soil microbial biomass in response to warming. Our findings suggest that global warming effect is not apparent when all the data are pooled together, while warming does increase microbial biomass under specific conditions (Delta C-degrees >= 2(degrees)C). This constructive influence is particularly accentuated under certain circumstances, including high precipitation levels (>800 mm), short treatment durations (<1 year), and within agricultural ecosystems. More importantly, our findings suggest that the impact of global warming on soil microbial biomass is largely mediated by changes in soil nitrogen availability. These findings underscore the pivotal role of nitrogen availability in modulating the response of soil microbial biomass to warming, while also emphasizing the intricate influence between multiple factors such as temperature, duration, and precipitation in shaping the patterns of warming effects.

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