Deciphering the stability of grassland productivity in response to rainfall manipulation experiments

Aim: Rainfall manipulation experiments are essential tools for deciphering mechanisms leading to variation in ecosystem stability across sites. Here, we gathered articles reporting results of experimental droughts on grasslands above-ground biomass: to identify which indices have been used to assess stability, to evaluate the overall grassland responses to drought, and to quantify the relative importance of drought characteristics and climatic conditions on explaining variation in stability. Location: Global Time period: 1989-2018 Major taxa studied: Grasslands Methods: We used meta-analysis approaches to evaluate overall grassland stability in terms of resistance, recovery and resilience, and multi-model inference to assess the relative importance of different moderators on explaining variability on those three stability properties. Results: Numerous indices of stability have been used, but they are inadequate for comparisons across sites. After applying standardized ind...研究目的：降雨调控实验是解析不同样点间生态系统稳定性变异机制的核心工具。本研究收集了报道草原地上生物量干旱实验结果的相关文献，旨在明确当前用于评估稳定性的各类指标，评估草原整体对干旱的响应特征，并量化干旱特征与气候条件在解释稳定性变异中的相对重要性。 研究区域：全球范围 时间跨度：1989年—2018年 研究类群：草原生态系统 研究方法：本研究采用元分析（meta-analysis）方法从抗性、恢复力与弹性三个维度评估草原整体稳定性，并通过多模型推断（multi-model inference）分析不同调节变量对上述三类稳定性特征变异的相对解释能力。 研究结果：当前已使用了多种稳定性评估指标，但这些指标难以实现不同样点间的横向比较。经标准化处理后……