The stress-gradient hypothesis (SGH) postulates that species interactions shift from negative to positive with increasing abiotic stress. Interactions between species are increasingly being recognized as important drivers of species distributions, but it is still unclear whether stress-induced changes in interactions affect continental-to-global scale species distributions. Here, we tested whether associations of vascular plant species in dry grasslands in Europe follow the SGH along a climatic water deficit (CWD) gradient across the continent.

中文翻译：

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有条件的爱？欧洲草原干旱敏感物种的共现模式与胁迫梯度假说一致


胁迫梯度假说（SGH）假设，随着非生物胁迫的增加，物种相互作用从负向转变为正向。物种之间的相互作用越来越被认为是物种分布的重要驱动因素，但目前尚不清楚压力引起的相互作用变化是否会影响大陆到全球范围内的物种分布。在这里，我们测试了欧洲干燥草原中维管植物物种的关联是否遵循 SGH 沿着整个大陆的气候缺水 (CWD) 梯度。