Biodiversity has widely been documented to enhance local community stability but whether such stabilizing effects of biodiversity extend to broader scales remains elusive. Here, we investigated the relationships between biodiversity and community stability in natural plant communities from quadrat (1 m²) to plot (400 m²) and regional (5−214 km²) scales and across broad climatic conditions, using an extensive plant community dataset from the National Ecological Observatory Network. We found that plant diversity provided consistent stabilizing effects on total community abundance across three nested spatial scales and climatic gradients. The strength of the stabilizing effects of biodiversity increased modestly with spatial scale and decreased as precipitation seasonality increased. Our findings illustrate the generality of diversity–stability theory across scales and climatic gradients, which provides a robust framework for understanding ecosystem responses to biodiversity and climate changes.

生物多样性已被广泛记录以增强当地社区的稳定性，但生物多样性的这种稳定作用是否扩展到更广泛的范围仍然难以捉摸。^{在这里，我们研究了从样方 (1 m 2} ) 到地块 (400 m ² ) 和区域 (5−214 km ² )的自然植物群落中生物多样性与群落稳定性之间的关系) 尺度和广泛的气候条件，使用来自国家生态观测站网络的广泛植物群落数据集。我们发现植物多样性在三个嵌套空间尺度和气候梯度上对总群落丰度提供了一致的稳定作用。生物多样性稳定效应的强度随着空间尺度的增加而适度增加，并随着降水季节性的增加而减弱。我们的研究结果说明了跨尺度和气候梯度的多样性-稳定性理论的普遍性，这为理解生态系统对生物多样性和气候变化的反应提供了一个强有力的框架。