The diversity and composition of natural communities are rapidly changing due to anthropogenic disturbances. Magnitude of this compositional reorganization varies across the globe, but reasons behind the variation remain largely unknown. Disturbances induce temporal turnover by stimulating species colonizations, causing local extinctions, altering dominance structure, or all of these. We test which of these processes drive temporal community changes, and whether they are constrained by natural environmental gradients. Moreover, we assess to what degree identity shifts translate to changes in dominance structure.

中文翻译：

---

扰动后生物多样性的时间变化沿环境梯度变化

由于人为干扰，自然群落的多样性和组成正在迅速变化。这种成分重组的幅度在全球范围内各不相同，但是造成这种变化的原因仍然未知。干扰会通过刺激物种定殖，引起局部灭绝，改变优势结构或所有这些来诱导时间更新。我们测试了这些过程中的哪些驱动了社区的暂时变化，以及它们是否受到自然环境梯度的约束。此外，我们评估了身份变化在多大程度上转化为优势结构的变化。