The aim was to test whether the responses of C:N:P stoichiometry in plant–soil–microorganism systems to precipitation changes support the prediction of the double asymmetry model, which predicts ecological processes (i.e. aboveground productivity, soil microbial community, and soil respiration) are more sensitive to increased precipitation (R+) than decreased precipitation (R−) under normal precipitation changes, whereas more sensitive to R− than R+ under extreme precipitation changes.

中文翻译：

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陆地 C:N:P 化学计量对降水变化的不对称响应

目的是测试植物-土壤-微生物系统中 C:N:P 化学计量对降水变化的响应是否支持双不对称模型的预测，该模型预测生态过程（即地上生产力、土壤微生物群落和土壤呼吸) 在正常降水变化下对降水增加 (R+) 比降水减少 (R-) 更敏感，而在极端降水变化下对 R- 比 R+ 更敏感。